SWODY1
SPC AC 290456
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1156 PM CDT MON APR 28 2008
VALID 291200Z - 301200Z
...NO SVR TSTM AREAS FORECAST...
AN UPPER-LEVEL TROUGH ACROSS THE ERN SEABOARD THIS MORNING IS
FORECAST TO MOVE OFFSHORE AS AN UPPER-LEVEL RIDGE MOVES EWD INTO THE
HIGH PLAINS. AT THE SFC...A COLD FRONT LOCATED IN SOUTH FLORIDA WILL
MOVE SLOWLY SWD AND SCATTERED THUNDERSTORMS SHOULD DEVELOP ALONG THE
BOUNDARY BY MIDDAY DUE TO LOW-LEVEL CONVERGENCE AND SFC HEATING.
ACROSS THE PACIFIC NORTHWEST...AN UPPER-LEVEL TROUGH WILL MOVE
ONSHORE EARLY TODAY. STRONG LARGE-SCALE ASCENT...STEEP LAPSE RATES
AND WARMING SFC TEMPS SHOULD RESULT IN ISOLATED THUNDERSTORM
DEVELOPMENT ACROSS THE PACIFIC NORTHWEST. AN AREA OF THUNDERSTORM
ACTIVITY MAY PERSIST OVERNIGHT AS THE UPPER-TROUGH BEGINS TO AFFECT
THE NRN ROCKIES. ATTM...A SEVERE THREAT IS NOT ANTICIPATED ACROSS
THE CONUS TODAY OR TONIGHT.
..BROYLES.. 04/29/2008
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