** General Information **
The SPC Short-Range Ensemble Forecast (SREF) system is based on
postprocessing the 15 member NCEP SREF plus the 3-hour time lagged,
operational (12 km grid spacing) NCEP Eta for a total of 16 members.
SPC SREF output available through this WEB interface is organized
similarly to its presentation in the SPC operational display system.
Start by choosing a general category from the Main Menu (below) as
well as a forecast hour. Then, select a specific grid diagnostic
from the submenu to view in the frame to the right.
All SREF information presented herein is for guidance purposes
only and should not be confused with official SPC operational
forecasts. Links to official SPC operational products are found
at the bottom of every menu.
Many of the SREF products were developed for testing the utility
of SREF analysis in the prediction of SPC mission critical items,
including: thunderstorms and severe thunderstorms, large scale
critical fire weather conditions, and mesoscale areas of hazardous
winter weather. In order to accomplish this goal and test new and
unqiue methods of SREF application in an operational environment,
many fields not produced in the NCEP postprocessor were calculated
locally for SPC purposes.