SWODY1
SPC AC 301242
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0742 AM CDT THU OCT 30 2008
VALID 301300Z - 311200Z
...NO SVR TSTM AREAS FORECAST...
...NEB TODAY AND ERN/SERN KS LATE TONIGHT...
A COMPACT MID LEVEL TROUGH OVER WRN NEB THIS MORNING WILL MOVE SEWD
TO ERN KS BY EARLY FRIDAY. AN INITIALLY DRY LOW-LEVEL AIR MASS WILL
REMAIN CAPPED DURING THE DAY ACROSS NEB...WITH THE ONLY THUNDERSTORM
THREAT CONFINED TO THE ZONE OF MID LEVEL ASCENT AND MOISTENING
IMMEDIATELY E OF THE TROUGH AXIS. MEANWHILE...MODEST BOUNDARY LAYER
MOISTURE WILL SPREAD NWD FROM TX TO ERN KS THROUGH THE PERIOD.
LOW-LEVEL MOISTENING WILL BE SUFFICIENT TO SUPPORT SOME ELEVATED
INSTABILITY /MUCAPE NEAR 500 J/KG/...AND THE COMBINATION OF
LOW-LEVEL WAA AND DCVA MAY SUPPORT ISOLATED ELEVATED THUNDERSTORM
DEVELOPMENT INVOF SERN KS AFTER 06Z TONIGHT.
...ELSEWHERE...
A MID LEVEL TROUGH WILL APPROACH THE PAC COAST TODAY THROUGH
TONIGHT...BRINGING WIDESPREAD PRECIPITATION FROM CENTRAL CA NWD INTO
WRN ORE/WA. HOWEVER...THE MID LEVEL THERMAL TROUGH AND ASSOCIATED
STEEPER LOW-MID LEVEL LAPSE RATES WILL REMAIN OFFSHORE THROUGH THE
PERIOD. FARTHER S...A WEAKENING MID LEVEL TROUGH INVOF THE NRN GULF
OF CA WILL LIFT NNEWD OVER AZ TODAY. LOW-MID LEVEL MOISTURE WILL BE
MORE LIMITED N OF THE INTERNATIONAL BORDER...THUS THUNDERSTORMS ARE
NOT EXPECTED.
..THOMPSON/JEWELL.. 10/30/2008
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