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Preliminary Results of a U.S. Deep South Modeling Experiment Using NASA SPoRT Initialization Datasets for Operational National Weather Service Local Model RunsA joint collaborative modeling effort among the NWS offices in Mobile, AL, and Houston, TX, and NASA Short-term Prediction Research and Transition (SPoRT) Center began during the 2011-2012 cold season, and continued into the 2012 warm season. The focus was on two frequent U.S. Deep South forecast challenges: the initiation of deep convection during the warm season; and heavy precipitation during the cold season. We wanted to examine the impact of certain NASA produced products on the Weather Research and Forecasting Environmental Modeling System in improving the model representation of mesoscale boundaries such as the local sea-, bay- and land-breezes (which often leads to warm season convective initiation); and improving the model representation of slow moving, or quasi-stationary frontal boundaries (which focus cold season storm cell training and heavy precipitation). The NASA products were: the 4-km Land Information System, a 1-km sea surface temperature analysis, and a 4-km greenness vegetation fraction analysis. Similar domains were established over the southeast Texas and Alabama coastlines, each with an outer grid with a 9 km spacing and an inner nest with a 3 km grid spacing. The model was run at each NWS office once per day out to 24 hours from 0600 UTC, using the NCEP Global Forecast System for initial and boundary conditions. Control runs without the NASA products were made at the NASA SPoRT Center. The NCAR Model Evaluation Tools verification package was used to evaluate both the positive and negative impacts of the NASA products on the model forecasts. Select case studies will be presented to highlight the influence of the products.
Document ID
20130000528
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Wood, Lance (National Oceanic and Atmospheric Administration Houston, TX, United States)
Medlin, Jeffrey M. (National Oceanic and Atmospheric Administration Mobile, AL, United States)
Case, Jon (ENSCO, Inc. Huntsville, AL, United States)
Date Acquired
August 27, 2013
Publication Date
October 6, 2012
Subject Category
Meteorology And Climatology
Report/Patent Number
M12-1826
Meeting Information
Meeting: 2012 National Weather Association 37th Annual Meeting
Location: Madison, WI
Country: United States
Start Date: October 6, 2012
End Date: October 11, 2012
Distribution Limits
Public
Copyright
Public Use Permitted.

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