#647 Postby weatherdude1108 » Thu Aug 21, 2014 8:38 am
It's always interesting to see the "tone" of the EWX discussion change in less than 24 hours (i.e., "IT DOES BEAR WATCHING.")
In this case, I like the "tone" change.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
626 AM CDT THU AUG 21 2014
LONG TERM (FRIDAY NIGHT THROUGH WEDNESDAY)...
THE UPPER HIGH IS FORECAST TO WEAKEN AND LIFT NORTH BY SUNDAY. THIS IS IN RESPONSE TO A LOW PRESSURE SYSTEM MOVING INTO THE NORTHERN PLAINS. THIS SHOULD ALLOW MOISTURE VALUES TO SLOWLY INCREASE AGAIN WITH AFTERNOON SHOWER AND THUNDERSTORM ACTIVITY RETURNING TO THE FORECAST ON WEDNESDAY. THE RETURN OF PRECIP COULD BE A BIT SOONER THAN THAT DEPENDING ON THE RATE OF THE MOISTURE RETURN...BUT OPTED TO LEAVE THE FORECAST DRY UNTIL WEDNESDAY FOR NOW. JUST BEYOND THE CURRENT PACKAGE...THE GFS IS FORECASTING A FAIRLY PROGRESSIVE TROUGH MOVING THROUGH THE PLAINS THURSDAY WHICH WOULD SEND A FRONTAL BOUNDARY INTO TEXAS THURSDAY/FRIDAY BRINGING RAIN CHANCES FOR MUCH OF THE FORECAST AREA. THE ECMWF IS MUCH SLOWER WITH ITS HANDLING OF THE UPPER TROUGH AND KEEPS HIGH PRESSURE PERSISTENT OVER THE SOUTHERN PLAINS. THE MORE PROGRESSIVE PATTERN OF THE THE OPERATIONAL GFS IS SUPPORTED BY MOST OF THE GFS ENSEMBLE MEMBERS AS WELL AS THE CANADIAN SO IT DOES BEAR WATCHING.
HAMPSHIRE
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