SWODY2
SPC AC 141720
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1220 PM CDT FRI SEP 14 2007
VALID 151200Z - 161200Z
..NO SVR TSTM AREAS FORECAST...
A LARGE AREA OF SFC HIGH PRESSURE WILL BE IN PLACE ACROSS THE ERN
HALF OF THE U.S. SATURDAY WITH A COLD FRONT LOCATED ACROSS THE SRN
GULF COAST STATES. SEVERAL AREAS WITH THUNDERSTORMS MAY BE ONGOING
ALONG THE BOUNDARY SATURDAY MORNING. AS SFC HEATING TAKES
PLACE...NEW CONVECTIVE DEVELOPMENT SHOULD TAKE PLACE WITH THE
THUNDERSTORM POTENTIAL SHIFTING SWD DURING THE DAY. INSTABILITY WILL
LIKELY BE STRONGEST ACROSS FL AND SRN GA SATURDAY AFTERNOON AS
SUGGESTED BY MODEL FORECASTS. HOWEVER...VERTICAL SHEAR SHOULD NOT BE
ADEQUATE FOR A MARGINAL SEVERE THREAT.
ISOLATED CONVECTION MAY ALSO DEVELOP ALONG A SFC TROUGH OVER THE
CNTRL HIGH PLAINS DURING THE LATE AFTERNOON WHERE MODEL FORECASTS
SHOW SBCAPE VALUES FROM 1000 TO 2000 J/KG. VERTICAL SHEAR SHOWN ON
FORECAST SOUNDINGS MAY BE STRONG ENOUGH FOR A MARGINAL SEVERE THREAT
BUT WILL NOT OUTLOOK THE AREA DUE TO UNCERTAINTY CONCERNING STORM
INITIATION AND CONVECTIVE COVERAGE. FURTHER EAST ACROSS THE MID-MO
VALLEY...ELEVATED THUNDERSTORMS MAY DEVELOP SATURDAY EVENING BUT
FORECAST CONDITIONS THERE ALSO DO NOT APPEAR ADEQUATE FOR A MARGINAL
SEVERE THREAT.
.BROYLES.. 09/14/2007
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