SWODY1
SPC AC 301957
DAY 1 CONVECTIVE OUTLOOK CORR 1
NWS STORM PREDICTION CENTER NORMAN OK
0257 PM CDT WED APR 30 2008
VALID 302000Z - 011200Z
...NO SVR TSTM AREAS FORECAST...
CORRECTED FOR CATEGORICAL OUTLOOK GRAPHIC
...WRN NEB THROUGH PARTS OF WRN SD...
A COLD FRONT EXTENDS FROM THE WRN DAKOTAS SWWD THROUGH SERN WY WITH
A PRE-FRONTAL WIND SHIFT FROM NERN CO THROUGH WRN NEB. THE FRONT
WILL MOVE SLOWLY SEWD TONIGHT. LIMITED LOW LEVEL MOISTURE WITH
DEWPOINTS GENERALLY IN THE 30S AND 40S EXISTS AHEAD OF THE FRONT.
STRONG SURFACE HEATING WITH DEEP MIXING AND STEEP LAPSE RATES ARE
RESULTING IN MODEST INSTABILITY WITH INVERTED-V BOUNDARY LAYERS.
ISOLATED HIGH BASED STORMS MAY DEVELOP OVER THE HIGHER TERRAIN OF
SERN WY AND SPREAD NEWD. OTHER STORMS MAY DEVELOP IN VICINITY OF THE
FRONT AND PRE-FRONTAL WIND SHIFT. LARGE BOUNDARY LAYER
TEMPERATURE-DEWPOINT SPREADS COULD SUPPORT ISOLATED STRONG WIND
GUSTS AS STORMS DEVELOP THIS AFTERNOON AND EVENING. OVERALL THREAT
APPEARS MARGINAL DUE TO LIMITED INSTABILITY.
..DIAL.. 04/30/2008
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