SWODY1
SPC AC 010055
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0755 PM CDT MON AUG 31 2009
VALID 010100Z - 011200Z
...NO SVR TSTM AREAS FORECAST...
...CENTRAL/SOUTHEAST MT TO CO/NORTHEAST NM HIGH PLAINS...
A FEW STRONGER STORMS WILL REMAIN POSSIBLE THIS EVENING ACROSS A
BROAD NORTH-SOUTH CORRIDOR FROM CENTRAL/SOUTHEAST MT TO THE EASTERN
PORTIONS OF WY/CO AND NORTHEAST NM. AS AN UPPER LOW CONTINUES TO
PROGRESS EASTWARD OVER MT THIS EVENING...RELATIVELY COOL MID LEVEL
THERMAL PROFILES /-11C AT 500 MB PER GREAT FALLS 00Z OBSERVED RAOB/
AND RESULTANT STEEP LAPSE RATE ENVIRONMENT/SUFFICIENT BUOYANCY
/1700+ J PER KG MUCAPE PER 00Z RIVERTON RAOB/ MAY SUPPORT A STORM OR
TWO CAPABLE OF SEVERE HAIL ACROSS PORTIONS OF MT/WY...MAINLY OVER
THE NEXT FEW HOURS. OTHER STORMS MAY POSE A SEVERE THREAT MAINLY
OVER THE NEXT HOUR OR SO ACROSS THE EASTERN CO/NORTHEAST NM
PLAINS...BUT NOCTURNALLY ENHANCED CINH IS SUGGESTIVE OF A WANING
TREND WITH AN ALREADY ISOLATED/MARGINAL RISK.
...FL/SOUTHEAST STATES...
CONVECTIVE OVERTURNING/NOCTURNAL INDUCED BOUNDARY LAYER
STABILIZATION AND OTHERWISE WEAK MID LEVEL LAPSE RATES/VERTICAL
SHEAR WILL RESULT IN A WANING SEVERE POTENTIAL ACROSS THE FL
PENINSULA THE REMAINDER OF THE EVENING.
..GUYER.. 09/01/2009
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