SWODY1
SPC AC 111604
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1104 AM CDT SUN OCT 11 2009
VALID 111630Z - 121200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UNSEASONABLY COOL/STABLE AIR MASS WILL REMAIN IN PLACE ACROSS MUCH
OF THE CENTRAL U.S. INTO THE GULF OF MEXICO LIMITING SEVERE
THUNDERSTORM THREAT ACROSS THE CONUS. HOWEVER...FAIRLY ACTIVE SRN
STREAM WILL PERSIST WITH LOW AMPLITUDE SHORTWAVE TROUGHS EJECTING
NEWD ACROSS NWRN MEXICO/SWRN U.S. SUSTAINING LOW LEVEL WAA REGIME
OVER THE SRN PLAINS INTO THE LOWER MS RIVER VALLEY. THIS WILL
MAINTAIN RISK OF ELEVATED MOIST CONVECTION...INCLUDING A FEW
THUNDERSTORMS...FOR MUCH OF THE PERIOD OVER THIS AREA. FARTHER
EAST...SEA BREEZES AND RESIDUAL SHALLOW SURFACE BOUNDARIES WILL
PROVIDE ADDITIONAL FOCUS FOR ISOLATED AFTERNOON/EVENING
THUNDERSTORMS. MORE CONCENTRATED AREA OF ELEVATED THUNDERSTORMS IS
EXPECTED LATE THIS EVENING OVER THE SRN PLAINS SPREADING INTO THE
MID SOUTH/LOWER MS RIVER...AND PERHAPS THE LOWER MO RIVER...VALLEYS
OVERNIGHT ALONG NOSE OF LLJ ASSOCIATED WITH EJECTING SRN STREAM
IMPULSE NOW OVER NWRN MEXICO/SWRN DESERTS.
..EVANS/GRAMS.. 10/11/2009
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