"The Weather Research and Forecasting (WRF) Model is a next-generation mesoscale numerical weather prediction system designed to serve both operational ... ...

The Weather Research and Forecasting (WRF) Model is a ... serve both operational forecasting and atmospheric research needs. ...

... However, the WRF temperature ensembles stay more coherent until the end of ... from an operational forecasting aspect, a larger ensemble spread is ...

The Weather Research and Forecasting (WRF) model is a next-generation mesoscale numerical weather prediction system designed to serve operational ...

The Weather Research and Forecast (WRF) project is a multi-institutional effort to develop an advanced mesoscale forecast and data assimilation system that is accurate, efficient, and scalable across a range of scales and over a host of computer platforms. The first release, WRF 1.0, was November 30, 2000, with ...

Using the recently developed Weather Research and Forecasting (WRF) 3DVAR and the WRF model, numerical experiments are conducted for the initialization and simulation of typhoon Rusa (2002). The observational data used in the WRF 3DVAR are conventional Global Telecommunications System (GTS) data and Korean ...

BMT ARGOSS operates the WRF atmosphere model for regional weather forecasts and long-term historical analyses across the globe. Operational forecasts for the Netherlands are provided to an energy company to obtain power output forecasts up to 5 days ahead. The ...

Oct 4, 2007 ... Coupled WRF-GCE-LIS. The WRF is a next-generation mesoscale forecast model and assimilation system that will be used to advance the ...

... Accession Number : ADA443014. Title : Weather Research and Forecasting (WRF) Results Over New Mexico. Descriptive Note : Final rept. ...

Sunday 11 September 2011 WRF Users' Overview WRF 3.3 Release Information WRF ARW Users' Page WRF NMM Users' Page Home Working Groups User Resources Projects Events Real-time...

During the past decade, both research and operational numerical weather prediction (NWP) models, e.g. Weather Research and Forecast (WRF) model, have started using more complex microphysical schemes originally developed from high-resolution cloud resolving models (CRMs) with a 1-2 km or less horizontal resolutions. ...

The Weather Research and Forecast (WRF) model is a new model development effort undertaken jointly by the National Center for Atmospheric Research (NCAR), the National Oceanic and Atmospheric Administration (NOAA), and a number of collaborating institutions and university scientists. The model is intended for use by operational NWP and ...

The Hawaiian Islands consist of large terrain changes over short distances, which results in a variety of microclimates in a very small region. Some islands have rainforests within a few miles of deserts; some have 10,000+ feet summits only a few miles away from the coastline. Because of this, weather models must be run at a much finer resolution to accurately forecast weather ...

The Hawaiian Islands consist of large terrain changes over short distances, which results in a variety of microclimates in a very small region. Some islands have rainforests within a few miles of deserts; some have 10,000+ feet summits only a few miles away from the coastline. Because of this, weather models must be run at a much finer resolution to accurately forecast weather ...

There have been very few mesoscale modelling studies of the Indian monsoon, with focus on the verification and intercomparison of the operational real time forecasts. With the exception of Das et al (2008), most of the studies in the literature are either the case studies of tropical cyclones and thunderstorms or the sensitivity studies involving physical ...

Aug 24, 2010 ... With these hallmarks, the WRF model is unique in the history of numerical weather prediction in the U.S. View entire text. Related URL ...

This module provides insights on how to best use WRF mesoscale model guidance in the forecast process. Using two cases in southwest Asia where AFWA WRF is currently in use, it examines improvements offered by the WRF for forecasting fronts, topographic impacts, precipitation type, and hazards ...

We have been able to successfully predict the atmospheric effects and concentrations of smoke downwind from Alaska wildfires. The so-called UAFSmoke system includes detection of wild fire location and area using data from the Alaska Interagency Coordination Center and thermal anomalies from the MODIS instrument. Fire emissions are derived from above ground biomass fuel load data in one-kilometer ...

Forecasts of available wind energy resources at high spatial resolution enable users to site wind turbines in optimal locations, to forecast available resources for integration into power grids, to schedule maintenance on wind energy facilities, and to define design criteria for next-generation turbines. This array of research needs implies that an ...

During the past decade, both research and operational numerical weather prediction models [e.g. the Weather Research and Forecasting Model (WRF)] have started using more complex microphysical schemes originally developed for high-resolution cloud resolving models (CRMs) with 1-2 km or less horizontal resolutions. ...

This service provides weather forecasts based on WRF (Weather Research & Forecasting) NWP model. The model is configured for territory of Ukraine (and ...

This service provides weather forecasts based on WRF (Weather Research & Forecasting) NWP model. The model is configured for territory of Ukraine (and ...

This service provides weather forecasts based on WRF (Weather Research & Forecasting) NWP model. The model is configured for territory of Ukraine (and ...

High resolution characterization of the lower atmosphere is an important aspect of infrasound propagation modeling of local and regional sources. Rawinsonde weather balloons can be used to obtain such information, but may be impractical or unavailable at the time and location of interest, and do not capture spatial variability that may be important over regional ranges. In this study, we explore ...

Community climate models have enabled development of specific environmental forecast systems. The University of Alaska (UAF) smoke group was created to adapt a smoke forecast system to the Alaska region. The US Forest Service (USFS) Missoula Fire Science Lab had developed a smoke forecast system based on the Weather Research and ...

In the last decade the progress in satellite precipitation estimation and the advance in precipitation assimilation techniques proved to have positive impact on the quality of atmospheric analyses and forecasts. Direct assimilation of rain-affected radiances presents new challenge to optimal utilization of satellite precipitation observations in numeric weather and climate ...

This study assesses the forecasts of the environment from the convection-allowing WRF models run for the 2008 NOAA/HWT Spring Experiment and how they compare to current operational models. Understanding the nature of the performance characteristics of convectionallowing models is important for the continued development of ...

This paper introduces a relocation scheme for tropical cyclone (TC) initialization in the Advanced Research Weather Research and Forecasting (ARW- WRF) model and demonstrates its application to 70 forecasts of Typhoons Sinlaku (2008), Jangmi (2008), and L...

This report establishes automated methods of obtaining and archiving initialization and time-dependent lateral condition data for the Weather Research and Forecast (WRF) mesoscale model. The data includes Eta forecast data, MADIS surface data, and upper-a...

... Title : Average Forecast Errors Using MM5 and WRF Over Complex Terrain: Utah, July/August 2003 and January/February 2004. ...

Weather Research & Forecasting. (WRF) Model. Visualization Tools. Workflow Tool. Modeling Guru (social networking tool). Sunday, March 21, 2010 ...

Accurate forecasting of available energy is crucial for the efficient management and use of wind power in the national power grid. With energy output critically dependent upon wind strength there is a need to reduce the errors associated wind forecasting. The objective of this research is to get the best possible wind forecasts for the ...

To aid in improving model parameterizations of clouds and convection, we examine the capability of models, using explicit convection, to simulate the life cycle of tropical cloud systems in the tropical warm pool. The cloud life cycle is determined using a satellite cloud tracking algorithm (Boer and Ramanathan, J. Geophys. Res., 1997), and the statistics are compared to those of simulations using ...

To aid in improving model parameterizations of clouds and convection, we examine the capability of models, using explicit convection, to simulate the life cycle of tropical cloud systems in the vicinity of the ARM Tropical Western Pacific sites. The cloud life cycle is determined using a satellite cloud tracking algorithm (Boer and Ramanathan, 1997), and the statistics are compared to those of ...

Daily Weather Briefing Rest of March 5: Highs in the low 80's F and scattered cloudiness along and Forecasted Regional Meteorological Conditions #12;Missing clouds 3 km WRF forecast 9 km WRF forecast 21 UTC 4 March (3 pm 4 March local time) 21 h forecast 4 March ...

Forecasting wind power is highly desired for power grid operation, and it is extremely challenging as well because of the sporadic temporal nature of atmospheric winds. Power companies must anticipate the magnitude and timing of wind power in order to balance their power load. Numerical weather prediction (NWP) models such as WRF are ...

The NASA Short-term Prediction Research and Transition (SPoRT) Center focuses on the transition of unique observations and research capabilities to the operational weather community, with a goal of improving short-term forecasts on a regional scale. Advances in research computing have lead to �Climate in a Box� systems, with hardware configurations ...

Higher resolution runs forecasted a slightly further inland progression of the sea breeze; Addition of MODIS SSTs improved forecast in northern Mobile Bay ...

with WRF. Recent Reports of Interest: NAS Report (2006), "Completing the Forecast: Characterizing and Communicating Uncertainty for Better Decisions Using Weather and...

NCEP HiResWindow Forecast Page The NCEP High-Resolution Window Forecast System (HIRESW) consists of daily runs of the WRF versions of the non-hydrostatic, hybrid vertical...

the country and around the world to study the formation of dangerous hurricanes and tornadoes, shifts are sufficient or, if they are not, how to improve the model to better capture what happens in the real world. Understanding proteins--which ones perform which duties, how they operate, and what happens when they fail

The number of wind farms situated in cold climate regions increases, e.g. in Sweden the installation of 30 TWh is planned in areas where temperatures are low and frequent icing occurs. The wind potential in cold climate regions is high but especially icing is a limiting factor. Thus, better knowledge about icing climatologies and wind power forecasts considering icing would ...

The commercial organisation MeteoGroup uses high resolution modelling for multiple purposes. MeteoGroup uses the Weather Research and Forecasting Model (WRF�1). WRF is used in the operational environment of several MeteoGroup companies across Europe. It is also used in hindcast studies, for example hurricane ...

Wind turbine micrositing, operational wind power forecasting, and turbine design require high-resolution simulations of atmospheric flow over complex terrain. We are developing large-eddy simulations (LES) for wind energy applications using the Weather Research and Forecasting (WRF) model. Grid nesting is used to ...

A nudging-based four-dimensional data assimilation (FDDA) system is being developed for the Weather Research and Forecasting (WRF) Model. This effort represents a collaboration between The Pennsylvania State University (i.e., Penn State), the National Center for Atmospheric Rese...

Nov 18, 2010 ... Hines, K.M., D.H. Bromwich, M. Barlage, and A.G. Slater (2009), Arctic land simulations with Polar WRF., American Meteorological Society 10th ...

Jun 9, 2006 ... Numerical model weather forecast output for the United States based on the WRF model. NASA Global Hydrology and Climate Center.

Jun 9, 2006 ... Numerical model weather forecast output for the United States based on the WRF model. NASA Global Hydrology and Climate Center.

Jun 9, 2006 ... Numerical model weather forecast output for the United States based on the WRF model. NASA Global Hydrology and Climate Center.

to the WRF-NMM - Replace NEXRAD Level II.5 data in Eta 3DVAR with NEXRAD Level II radial wind data in GSI - GSI uses background errors based on WRF-NMM forecasts; Eta 3DVAR...

A fully coupled "online" Weather Research and Forecasting/Chemistry (WRF/Chem) model has been developed. The air quality component of the model is fully consistent with the meteorological component; both components use the same transport scheme (mass and scalar preserving), the s...

This presentation describes modifications that were made to the Community Multiscale Air Quality (CMAQ) Modeling System's Meteorology-Chemistry Interface Processor (MCIP) to ingest a new meteorological model, the Weather Research and Forecasting (WRF) Model. This presentation al...

In collaboration with Xcel Energy and Vasaila Inc., the National Center for Atmospheric Research (NCAR) conducts modeling study to evaluate the existing and the enhanced intensive observation systems for wind power nowcasting and short-range forecasting at a northern Colorado wind farm. The NCAR WRF (Weather Research and Forecasting ...

Planetary Boundary Layer (PBL) dynamics is crucial in providing accurate air quality forecasts and is very useful in assessing air-transport models. In particular, incorrect determination of PBL dynamics can lead to imprecise surface particulate matter (PM) monitoring since aerosols are usually well mixed within the PBL during the convective heating period. However, PBL ...

Accurate short-term forecasts of wind resources are required for efficient wind farm operation and ultimately for the integration of large amounts of wind-generated power into electrical grids. Siemens Energy Inc. and Lawrence Livermore National Laboratory, with the University of Colorado at Boulder, are collaborating on the design of an ...

The accurate prediction of air quality using numerical models involves correctly simulating both the meteorology and chemical processes. With the recent increases in computing power, complex three-dimensional air quality models have become a cost effective tool to study physical processes and their interaction with air chemistry, as well as different model formulations to treat the formation and ...

In Northeast China (NEC), snowfalls usually occur during winter and early spring, from mid-October to late March, and strong snowfalls rarely occur in middle spring. During 12-13 April 2010, an exceptionally strong snowfall occurred in NEC, with 26.8 mm of accumulated water-equivalent snow over Harbin, the capital of the most eastern province in NEC. In this study, the major features of the ...

On February 20, 2010, Madeira Island was struck by a violent rain storm, which led to a major flash flood leading to more than 50 casualties and an estimated property loss above 1G�. The storm was not well forecasted by the Institute of Meteorology, based on the global ECMWF forecast. However, the operational ...

The Advanced Hurricane WRF (AHW) has been used for real-time prediction and retrospective research simulations of Atlantic basin tropical cyclones since 2003. Verification of the intensity and track errors of the AHW forecasts has shown that 12 km and 4 km simulations perform as well as, and occasionally superior to, the National Hurricane Center official ...

LAPS & STMAS TopoGrabber WRF Domain Wizard Realtime Products Forecasts Analyses On-the-Fly Analyses/Forecasts Verification STMAS LAPS FAB You are here: Home -> Web Products ->...

LAPS & STMAS TopoGrabber WRF Domain Wizard Realtime Products Forecasts Analyses On-the-Fly Analyses/Forecasts Verification STMAS LAPS FAB You are here: Home -> Web Products ->...

Simulated evolution of climate and weather is sensitive to the specification of their initial state. Small errors in the initial state could lead the forecast into a different direction. It is essential to estimate the impact of the uncertainty in initial conditions on the forecast accuracy. For limited-area or regional forecasting, ...

With increasing demand for more accurate atmospheric simulations for wind turbine micrositing, for operational wind power forecasting, and for more reliable turbine design, simulations of atmospheric flow with resolution of tens of meters or higher are required. These time-dependent large-eddy simulations (LES), which resolve individual atmospheric eddies ...

Contemporary atmospheric numerical models contain a large number of physical parameterization schemes in order to represent the various atmospheric processes that take place in sub-grid scales. The choice of the proper combination of such schemes is a challenging task for research and particularly for operational purposes. This choice becomes a very important decision in cases ...

The significant improvement to weather forecast skill due to directly assimilating the satellite-observed radiance data was witnessed. Chinese Meteorological Administration has developed a three dimensional data assimilation system (Grapes 3Dvar), and with the radiance data directly assimilated by RTTOV as observation operator. On 27 May 2008, China has ...

Objective verification is an important and basic instrument to evaluate and analyze the quality of meteorological model outputs. In particular it is a valuable tool for assessing QPF (Quantitative Precipitation Forecast) quality with respect to severe weather events. On the other hand objective verification allows a better understanding of models� behaviour in different ...

Objective verification is an important and basic instrument to evaluate and analyze the quality of meteorological model outputs. In particular it is a valuable tool for assessing QPF (Quantitative Precipitation Forecast) quality with respect to severe weather events. On the other hand objective verification allows a better understanding of models' behaviour in different ...

Wind energy is one form of clean energy that is expected to play a significant role in power generation in many countries. Accurate wind forecasts are essential for balancing wind energy production and hence ensuring reliable grid operations, as well as for reducing the cost of wind power integration. One of the most effective ways to improve weather ...

For many hydrological applications, dynamic downscaling from global analyses has been used to provide local scale information on spatial and temporal distribution of precipitation and other associated environmental parameters. In the near future the NASA Global Precipitation Measurement (GPM) Mission will provide new sources of precipitation observations with unprecedented spatial and temporal ...

In recent decades,much progress has been made in producing skillful seasonal forecasts for the cool season in the western United States, largely because climate interannual variability tied to atmospheric teleconnection responses of ENSO and Pacific decadal variability can be resolved by global models and are present in the recent historical record as statistically robust ...

... the National Center for Atmospheric Research (NCAR) and ... A typical upper-air temperature result is shown ... the other two stations resulted when ...

At the minimum, all offices will define at least two significant weather seasons . National Weather Service. NWS Instruction 20-101 ...

Digital filtering, Nonhydrostatic dynamics modification, New default moisture advection WRF-Chem updates Huricane vortex idealized case Timeline The timeline for the...

Sunday 11 September 2011 Introduction WRF Administration Presentations Publications Development Teams Directory: by Group Directory: Alphabetical The DTC Home Working Groups User...

Keywords: SPoRT, AIRS, data assimilation, numerical weather prediction, quality control, forecast improvement, satellite-retrieved profiles, ADAS, WRF ...

Numerical prediction of an antarctic severe wind event with the Weather Research and Forecasting (WRF) model. MONTHLY WEATHER REVIEW, 135(9), 3134-3157. ...

Simulations of Hurricane Katrina using the Weather Research and Forecasting ( WRF) model on a 9 kin grid over the Gulf of Mexico and the Southeast United ...

... with a small closed off low over NW Africa and the ... and the inclusion of an upper boundary condition ... Finally, forecasts were initialized identically ...

... with a small closed off low over NW Africa and the ... and the inclusion of an upper boundary condition ... Finally, forecasts were initialized identically ...

Used for forecaster awareness, to brief leadership, and to ... Daily performance statistics critical to model confidence. Identify and prioritize model ...

The Weather Research and Forecasting (WRF) model allows users to choose among ... In addition, SMG needed to be able to define the pressure levels for the ...

WINDSOR - LAPS / STMAS Page Welcome to our ESRL study of the Windsor, CO tornado of May 22, 2008. Milestones Compare the accuracy of WRF forecasts initialized at different times to...

The Pleim-Xiu land surface model, Pleim surface layer scheme, and Asymmetric Convective Model (version 2) are now options in version 3.0 of the Weather Research and Forecasting model (WRF) Advanced Research WRF (ARW) core. These physics parameterizations were developed for the f...

Numerical models with a fine grid can be a useful tool for investigation of urban forecast which provide input to air dispersion and pollution model. Simulation for urban forecast may be conducted using CFD model or mesoscale model. A small domain of the CFD model limits for the study of larger scale forcing to the urban environment. Improvement of ...

Improving our understanding and forecasting of hurricane track and intensity - particularly sudden intensification and weakening - remains a challenge for the operational and research communities, and a significant amount of work remains to be done in validating hurricane forecast models, understanding their sensitivities and improving ...

The goal of this work is to improve warm season forecasts in the North American Monsoon Region. To do this, we are dynamically downscaling warm season CFS (Climate Forecast System) reforecasts from 1982-2005 for the contiguous U.S. using the Weather Research and Forecasting (WRF) regional climate model. CFS is the ...

An operational turbulence forecast system for commercial and aviation use is described that is based on an ensemble of turbulence diagnostics derived from standard NWP model outputs. In the U. S. this forecast product is named GTG (Graphical Turbulence Guidance) and has been described in detail in Sharman et al., WAF 2006. Since ...

of WRF/Chem-MADRID at 24-km over New England (CMAS 2007) � Implementation of CB05-KPP in WRF/Chem-MADRID and operational at NCSU � 2004: Incorporation of MADRID into WRF/Chem � 2005: Testing, application, evaluation-MTEM Sectional Binary Sectional Dynamic with ASTEEM Same as MADE/SORGAM Resistance transfer ...

The Antarctic Mesoscale Prediction System (AMPS) project provides real-time high-resolution numerical weather forecasts for the Antarctic. One important area of potential improvement in AMPS forecasts remains the prediction of low-level moisture and cloud cover. Previous studies have demonstrated the benefits of assimilating zenith tropospheric delay (ZTD) ...

General Circulation Models (GCMs) have proven to be an effective tool to simulate many aspects of large-scale and global climate. However, their applicability to climate impact studies is limited by their capabilities to resolve regional scale situations. In this sense, dynamical downscaling techniques are an appropriate alternative to estimate high resolution regional climatologies. In this ...

A web portal is being developed to facilitate painless interaction with the Weather Research and Forecasting (WRF) model. Named VolksWRF - or, the People's WRF - this system is intended to provide opportunities for research and education in numerical weather prediction. VolksWRF has been ...

During the third week of January 2010 a series of heavy-rainfall-producing systems apparently related to an atmospheric river (AR) swept into California during the Hydrometeorological Testbed (HMT) winter exercise. As part of this exercise, an experimental regional ensemble Weather Research and Forecasting (WRF) numerical modeling system developed at ...

An operational forecast was developed for the break-up of coastal landfast sea ice in the Chukchi Sea off of Barrow, Alaska. The break-up process was systematically analyzed from 2000 to 2009 based on local observations of snow and ice conditions, climate records, image sequences obtained from web cameras, coastal X-band marine RADAR, and satellite imagery ...

Current seasonal climate forecasts and climate change projections of the North American monsoon are based on the use of course-scale information from a general circulation model. The global models, however, have substantial difficulty in resolving the regional scale forcing mechanisms of precipitation. This is especially true during the period of the North American Monsoon in ...

With increasing demand for more accurate atmospheric simulations for wind turbine micrositing, for operational wind power forecasting, and for more reliable turbine design, simulations of atmospheric flow with resolution of tens of meters or higher are required. These time-dependent large-eddy simulations (LES) account for complex terrain and resolve ...

Even though grass fires are associated with smaller scales and lower intensities than forest fires, due to their very high spread rates, they can present a serious threat not only to firefighters but to communities located within grassland environments. This threat may be attributed to both the natural grass fires as well as prescribed grass burns that run out of control. Due to lack of in situ ...

Simulations of a squall line system which occurred on 12 August 2004 near Munich, Germany are performed using a fine grid version of the Weather Research and Forecasting (WRF) model with five different microphysical schemes. Synthetic dual polarization observations are created from the model output and compared with detailed observations gathered by the ...

Development of the 4-dimensional component (4D-Var) of WRF variational data assimilation system (WRF- Var) has been on going for a few years. The WRF 4D-Var system is consisted of WRF-Var, WRF and WRF+ (adjoint and tangent linear model), which lets the ...

Tropical cyclones are a serious concern for the nation, causing significant risk to life, property and economic vitality. The National Oceanic and Atmospheric Administration (NOAA) National Weather Service has a mission of issuing tropical cyclone forecasts and warnings, aimed at protecting life and property and enhancing the national economy. In the last 10 years, the errors ...

Modern optical and infrared astronomical sites are getting used to a flexible way of operation, namely queue modes, allowing astronomical observations in the most appropriate weather conditions for each specific observing scientific program. The forecast of weather conditions is then a mandatory issue to plan in advance the observations queue for each ...

The remarkable 2004 Atlantic hurricane season featured six "major" hurricanes (according to the Saffir-Simpson (SS) intensity scale), four of which directly impacted the state of Florida (Charley, Frances, Ivan, Jeanne) within a six-week period. Of these, Hurricane Ivan distinguished itself with impressive statistics in terms of lifespan (22 days), maximum intensity (SS category 5), damage (est. ...

The unified Non-hydrostatic Multi-scale Model on the B grid (NMMB) is being developed at NCEP as a part of the National Environmental Modeling System (NEMS). The finite-volume horizontal differencing employed in the model preserves important properties of differential operators and conserves a variety of basic and derived dynamical and quadratic quantities. Among these, ...

LAPS & STMAS TopoGrabber WRF Domain Wizard Realtime Products Forecasts Analyses On-the-Fly Analyses/Forecasts Verification STMAS LAPS FAB You are here: Home -> Web Products ->...

Nov 20, 2009 ... Create WRF forecasts of LTG threat (1-24 h), based on .... n3 (short expt), 2.5 at t=16 hr, 6.7 at t=16 hr. n4, 7.1 at t=29 hr ...

Model. Forecast. @ T2. SOS. Client. WNS. Notify modelers of WRF analysis. ARPS Data ... SPoRT Server. SMART Server. SMART Server. VAST Server. VAST Server ...

The ability of the Weather Research and Forecast (WRF) atmospheric model to forecast wind speed over the Nysted wind park was investigated as a function of time. It was found that in the time period we considered (August 1-19, 2008), the model is able to ...

Analyses On-the-Fly Analyses/Forecasts Verification Staff Projects LAPS LAPS Observation Simulation System Satellite Products WRF Modeling Ensemble Modeling WFO-Advanced Support...

... ES) US Army Research Laboratory 2800 Powder Mill Road Adelphi ... forecast values of surface temperature, dew-point temperature, wind speed, and ...

: The commonly used approach ("offline") AQ-Forecast Chemical, Aerosol, Removal modules Weather model Weather Data Analysis & Assimilation Weather-Forecast Biogenic and Anthropogenic emissions Air quality model #12;WRF/Chem: Online coupling of modeling systems WRF/Chem: Online coupling of modeling systems ...

Low visibility(<1000m)/fog is very hazardous to air/land traffic and is beeing particularly emphasized at National Weather Service(NWS) of NOAA and in NextGen, a future Air Traffic Management System of Federal Aviation Administration (FAA), United States. As of now however, fog forecast is still not operational guidance from National Centers for ...

After a few years of experimental setup, model refinement and parameters calibration, a distributed flood forecasting system for the Tuscany region was promoted to operational use in early 2008. The hydrologic core of the system, MOBIDIC, is a fully distributed soil moisture accounting model, with sequential assimilation of hydrometric data. The model is ...

This presentation will give an overview of the principles, algorithms, and features of the coupled atmosphere-wildland fire software WRF-Fire. WRF-Fire consists of a fire-spread model, based on a modified Rothermel's formula implemented by the level-set method, coupled with the Weather Research and Forecasting model ...

A new physically-based methodology for probable maximum precipitation (PMP) estimation is developed over the American River Watershed (ARW) using the Weather Research and Forecast (WRF-ARW) model. A persistent moisture flux convergence pattern, called Pineapple Express, is analyzed for 42 historical extreme precipitation events, and it is found that ...

Dramatic improvement in tropical cyclone track forecasts have occurred through advancements in high quality observations, high speed computers and improvements in dynamical models. Similar advancements now need to be made for tropical cyclone intensity, structure and rainfall prediction. The Weather Research Forecasting Model (WRF) is ...

Coastal Carolina University (CCU) students in Computer Science participated in a project to set up an operational weather forecast for the local community. The project involved the construction of two computing clusters and the automation of daily forecasting. Funded by NSF-MRI, two high-performance clusters were successfully ...

The verification of numerical weather forecasts is an essential part of every forecasting system especially when dealing with Civil Protection warnings. The LaMMA Consortium (Laboratory for Meteorology and Environmental Modelling) being the regional weather forecasting service of Tuscany Region (Italy) is responsible for issuing the ...

In 2009, the National Center for Atmospheric Science (NCAR)/Research Applications Laboratory�s (RALs) Joint Numerical Testbed (JNT) Program formed a new entity called the Tropical Cyclone Modeling Team (TCMT). The focus of this team is testing and evaluation of experimental models with the goal of improving tropical cyclone forecasts. Much of this effort is sponsored by ...

The model PROCULTURE has been developed by the Universit� Catholique de Louvain - UCL (Belgium) to simulate the progress of the septoria leaf blotch disease on winter wheat during the cropping season. The model has been validated in Luxembourg for four years at four distinct representative sites. It is able to identify infection periods due to the causal agent Mycosphaerella graminicola on the ...

Using Bayesian Model Averaging (BMA), an attempt was made to obtain calibrated probabilistic numerical forecasts of 2-m temperature over Iran. The ensemble employs three limited area models (WRF, MM5 and HRM), with WRF used with five different configurations. Initial and boundary conditions for MM5 and WRF are ...

Assimilation experiments are performed with the Weather Research and Forecasting (WRF) models' three-dimensional variational data assimilation (3D-Var) scheme to evaluate the impact of directly assimilating the Advanced Television and Infrared Observation Satellite Operational Vertical Sounder (ATOVS) radiance, including AMSU-A, AMSU-B ...

The Arctic Region Supercomputing Center (ARSC) has evaluated multicore processors and other emerging processor technologies for a variety of high performance computing applications in the earth and space sciences, especially climate and weather applications. A flagship effort has been to assess dual core processor nodes on ARSC's Midnight supercomputer, in which two-socket systems were compared ...

of forecasting are compared. Team & abbreviation Approach Numerical Weather prediction model with spatial, irradiance forecasts based on global model numerical weather prediction models in combination with post, + GFS: Global Forecast System x WRF, Skiron, AEMET-HIRLAM: mesocale numerical weather prediction ...

Integrated hydro-meteorological systems that can accurately forecast flash flood events at urban scales have become requisite tools to support emergency management and decision making for business operations. Components of such complex systems are typically developed, tested and validated as stand-alone applications, with varying spatial and temporal ...

Coastal California�s complex terrain shows promising potential for wind energy capture given the consistent, moderately strong onshore flow of air over the Coastal Range. Coupling this background flow and the different mountain atmosphere phenomena that act to further accelerate and channel the flow, certain sections of the coastal range could be a viable location for wind turbine farms. For ...

Aug 31, 2011 ... Modular framework enables easy substitution of datasets, LSMs, forcings, etc. � Adopted by AFWA for operational use in WRF ...

Numerical Weather Prediction plays a very important role in weather forecasting. Different models have been running in different weather forecasting centers. The Macao Meteorological and Geophysical Bureau (SMG) has been using MM5 for daily weather forecast since 1999. As further development on MM5 is ceased, another ...

Prior to the XXIX Olympiad in Beijing, air quality was a major concern for many athletes and visitors to the Games. In response to the need for enhanced air quality forecasts, we explored and tested the capability of medium-range air quality forecasting in a multimodel ensemble system. The system consists of the Weather Research and ...

With 3GW of installed wind turbines, corresponding to 23% of the total electric grid, and a 5-year plan that will grow that value above 5GW (near 40% of the grid), Portugal has been a recent success case for renewable energy development. Clearly such large share of wind energy in the national electric system implies a strong requirement for accurate wind forecasts, that can be ...

Hydrological hazards, which often occur in conjunction with extreme precipitation events, are the most frequent type of natural disaster in Taiwan. Hence, the researchers at the Taiwan Typhoon and Flood Research Institute (TTFRI) are devoted to analyzing and gaining a better understanding of the causes and effects of natural disasters, and in particular, typhoons and floods. The long-term goal of ...

An Observing System Simulation Experiment (OSSE) was developed and conducted to assess the potential impact of different observing strategies of field experiments on analysis and short-term forecasts. A Mei-Yu front rainfall case study, occurring in 2003 in southeastern Asia, was utilized to demonstrate the OSSE application to field experiments. Data sampling strategies from ...

Many applications require accurate weather information over broad temporal and spatial scales. For example, wind energy prediction requires regional weather forecasting to cope with intra-hour, multi-hour and day ahead decision-making. In addition, microscale modeling is needed to support wind turbine sitting decisions and turbine operations. In the last ...

........................................................................................................ 9 2.2 I/O Quilting Initialization_init routine. I/O initialization, including quilting initialization for clients and servers, occurs here with the "DM_PARALLEL" flag, the subroutine init_module_wrf_quilt (Figure 2 block 1.A) is called. After ...

Hurricane WRF (AHW) model. Based on sensitivity simulations of Katrina, the inner core structure. The forecast of rapid intensification and the structure of convective bands in Katrina were not significantly-layer ocean model eliminated much of the erroneous intensification of Katrina prior to landfall noted

("offline") AQ-Forecast Chemical, Aerosol, Removal modules Weather model Weather Data Analysis, Tanya Smirnova, Jian-Wen Bao (PSD), Paul Schultz #12;OutlineOutline � Physics developments for the Weather � WRF/Chem � MM5/WRF and Ocean/Wave models � Future Plans � Physics developments for the Weather

Since the Community Multiscale Air Quality modeling system (CMAQ) and the Weather Research and Forecasting with Chemistry model (WRF/Chem) use different approaches to simulate the interaction of meteorology and chemistry, this study compares the CMAQ and WRF/Chem air quality simu...

A recently published meteorology and air quality modeling study has several serious deficiencies deserving comment. The study uses the weather research and forecasting/chemistry (WRF/Chem) model to compare and evaluate boundary layer and land surface modeling options. The most se...

Comprehensive sensitivity analyses on physical parameterization schemes of Weather Research Forecast (WRF-ARW core) model have been carried out for the prediction of track and intensity of tropical cyclones by taking the example of cyclone Nargis, which formed over the Bay of Bengal and hit Myanmar on 02 May 2008, causing widespread damages in terms of ...

The development of the Nebula Cloud Computing Platform at NASA Ames Research Center provides an open-source solution for the deployment of scalable computing and storage capabilities relevant to the execution of real-time weather forecasts and the distribution of high resolution satellite data to the operational weather community. Two projects at Marshall ...

Accurate information of the spatial distribution and temporal variations of water vapor is essential for the study of short-term severe weather phenomena, such as localized heavy rainfalls that often cause serious damages during the summer season on the Korean Peninsula. In particular, a good description of the initial conditions for the three-dimensional water vapor field is crucial for the ...

Regional/mesoscale models are often utilized for wind resource estimates, owing to the low spatial and temporal representativeness of routine measurements and global reanalysis. In many applied scientific disciplines including wind engineering, it is often considered that the higher resolution the better, i.e. that increased horizontal resolution of the model yields more accurate results. However, ...

The Weather Research and Forecasting (WRF) model was used to study the skill, sensitivity and limitations of a mesoscale model in predicting wind speed fluctuations on time scales of tens of minutes to hours. The work was motivated by the severely variable wind conditions that are often observed at the Horns Rev wind farm in the Danish North Sea. From a ...

Three models, MM5, COAMPS, and WRF, have been applied for the warm season in 2003 and the cool season in 2003-2004 to evaluate their performances. All models run over the same domain area covering the north Gulf Mexico and southeastern United States (US) region with the same spatial resolution of 27 km. It was found that the temporal variations of the mean error distribution ...

0-hr output. The authors contacted Dr. John McGinley of GSD to determine the ..... The largest MSE of 19.67 kt occurred at the 12 hr WRF forecast interval. ...

The current state-of-the-art mesoscale Weather Research and Forecasting (WRF) ...... scheme with a small step for acoustic and gravity wave modes, and up to ...... ways: off-line or coupled with a numerical weather prediction model. ...

Icing on structures is an important issue for wind energy developments in many regions of the world. Unfortunately, information about icing conditions is mostly rare due to a lack of measurements. Additionally, there is not much known about the operation of wind turbines in icing conditions. It is the aim of the current study to investigate the effect of icing on power ...

Based on the visibility analysis data during November 2009 through April 2010 over North America from the Aviation Digital Database Service (ADDS), the performance of low visibility/fog predictions from the current operational 12 km-NAM, 13 km-RUC and 32 km-WRF-NMM models at the National Centers for Environmental Prediction (NCEP) was evaluated. The ...

For medium-sized catchments, characterized by short response times, hydrological predictions have to rely on quantitative precipitation forecasts (QPFs) issued by meteorological models. Although meteorological predictions are becoming more and more accurate, QPFs are still affected by errors which can be relevant at the scales of interest for hydrological purposes. In order to ...

Numerical weather prediction ensembles are routinely used for operational weather forecasting. The members of these ensembles are individual simulations with either slightly perturbed initial conditions or different model parameterizations, or occasionally both. Multi-member ensemble output is usually large, multivariate, and challenging to interpret ...

Accurate short-term wind speed forecasts for utility-scale large wind farms will be crucial for the U.S. Department of Energy's goal of providing 20% of total electricity from wind by 2030. Communicating the level of uncertainty in these wind speed forecasts will allow the industry to better quantify the level of financial risk inherent with these ...

High Flux Isotope Reactor Long-Range Operating Forecast Operating Forecast The Operating Forecast is updated at the completion of each refueling outage. FY 08 Planning Forecast...

of components which other COMET training on Numerical Weather Prediction (NWP) has, e.g. see Bua and Jascourt Conference on Weather Analysis and Forecasting/16 th Conference on Numerical Weather Prediction, Seattle, WA, Amer. Meteor. Soc., on CD-ROM Bua, W. R. and S. D. Jascourt, 2005: The Numerical Weather Prediction

687 No. of Pages FORECASTER'S FORUM IFPS and the Future of the National Weather Service CLIFFORD F forecast products if it is to remain ef- fective and relevant. First, only graphical/gridded dis- tribution- spheric Research Mesoscale Model (MM5), and the Weather Research and Forecasting (WRF) Model pro- ducing

The local ensemble transform Kalman filter (LETKF) is implemented with the Weather Research and Forecasting (WRF) model, and real observations are assimilated to assess the newly-developed WRF-LETKF system. The WRF model is a widely-used mesoscale numerical weather prediction model, and the LETKF is an ensemble ...

The NASA Unified Weather Research and Forecasting (NU-WRF) Model is an effort to unify several WRF variants developed at NASA and bring together NASA's existing earth science models and assimilation systems that simulate the interaction among clouds, aerosols, atmospheric gases, precipitation, and land surfaces. By developing ...

The Community Land Model version 3 (CLM3) developed by the National Center for Atmospheric Research (NCAR) was coupled into the Weather Research and Forecasting (WRF) Model version 2.2. The performance of WRF-CLM3 in predicting regional climate was quantitatively compared with that of WRF coupled to the soil ...

This presentation will describe a number of issues relevant to the use of mesoscale meteorological models for the development and operation of wind power plants. An accurate description of the local winds over a range of spatial and temporal scales is important for wind plants. In addition to various measurement methods, a number of modeling tools can be used to explore ...

This study aims to investigate the effect of different types of model initialization applied to extreme storms simulations. Storms with extreme precipitation can usually produce flash floods that cause several damages to the society. Lives and property are destroyed from the landslides when they could be speared if forecasted a few hours in advance. The ...

Maximum updraft helicity, which can be used to detect mid-level mesocyclones in simulated convection ( Kain et al. 2008 ). ...

The fog events are adversely affecting transportation due to worsening visibility, affecting the air quality and health through accumulation of pollutants near the ground. Forecasting the fog events successfully is helpful to reduce their disadvantageous impact on visibility, air quality and health etc. The forecasting ability of numerical model for fog is ...

During the year 2008, the United States National Weather Service (NWS) completed an eight fold increase in sampling capability for weather radars to 250 m resolution. This increase is expected to improve warning lead times by detecting small scale features sooner with increased reliability; however, current NWS operational model domains utilize grid spacing an order of ...

The presence of fog and low clouds in the lower atmosphere can have a critical impact on both airborne and ground transports and is often connected with serious accidents. An improvement of localisation, duration and variations in visibility therefore holds an immense operational value for the field of transportation in conditions of low visibility. However, fog is generally a ...

Forecasting air quality in mountainous terrain is a challenging topic. In this study, we aim to understand the diurnal variability of particulate matter, CO, and CO2 in the Shenandoah National Park (SNP) located in the Blue Ridge Mountains of Virginia. We focus on the effect of atmospheric boundary layer (ABL) dynamics on the diurnal aerosol variability using a combination of ...

In the Central Valley of California, stream temperature is a critical indicator of habitat quality for endangered salmonid species and affects re-licensing of major water projects and dam operations worth billions of dollars. However, many water resource-related decisions in regulated rivers rely upon models using a daily-to-monthly mean temperature standard. Furthermore, ...

Surface topography such as mountain barriers, existing water bodies and semi-permanent mountain glaciers changes large scale atmospheric patterns and creates a challenge for a reliable precipitation prediction. Eastern Black sea region of Turkey is an example. Black Sea Mountain chains lies west to east along the coastline with the average height of 2000 m and the highest point is 3973 m, and ...

On April 14th, 2010, the long-dormant ice-capped volcano Eyjafjallaj�kull in southern Iceland exhibited a black ash-rich plume that quickly developed into an upper-tropospheric ash-cloud covering large parts of Europe grounding the majority of European air traffic for days. The emission of the ash-cloud continued for three days before the eruption turned more magmatic on April 18th. Due to a ...

Wind energy decision makers are required to make critical judgments on a daily basis with regard to energy generation, distribution, demand, storage, and integration. Accurate knowledge of the present and future state of the atmosphere is vital in making these decisions. As wind energy portfolios expand, this forecast problem is taking on new urgency because wind ...

... Descriptors : *FORECASTING, *METEOROLOGY, *AIRCRAFT CARRIERS, *METRIC SYSTEM, AUTOMATION, WEATHER, TRAINING ...