SWODY1
SPC AC 310054
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0754 PM CDT TUE AUG 30 2011
VALID 310100Z - 311200Z
...NO SVR TSTM AREAS FORECAST...
THE LATEST WATER VAPOR IMAGERY SHOWS A SHORTWAVE TROUGH OVER THE
UPPER MS VALLEY WITH AN UPPER-LEVEL RIDGE IN THE CNTRL HIGH PLAINS.
TO THE WEST OF THE RIDGE AXIS...A NARROW CORRIDOR OF INSTABILITY IS
ANALYZED FROM NRN WY NWWD INTO CNTRL MT. ON THE WEST EDGE OF THE
INSTABILITY AXIS...ISOLATED THUNDERSTORMS ARE FORECAST TO CONTINUE
INITIATING ACROSS SOUTHWEST MT AND MOVE EWD INTO CNTRL MT THIS
EVENING. TWO FACTORS THAT SHOULD LIMIT THE SEVERE THREAT WITH THIS
ACTIVITY ARE THE DRY AIRMASS IN PLACE /SFC DEWPOINTS IN THE LOWER
40S F/ AND SUBSIDENCE ASSOCIATED WITH THE UPPER-LEVEL RIDGE. FOR
THESE REASONS...HAVE REMOVED THE 5 PERCENT WIND DAMAGE PROBABILITY
FROM SRN MT.
ELSEWHERE ACROSS THE CONUS...A SEVERE THREAT IS NOT EXPECTED THIS
EVENING OR TONIGHT.
..BROYLES.. 08/31/2011
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