SWODY1
SPC AC 191949
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0249 PM CDT FRI SEP 19 2008
VALID 192000Z - 201200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
PRIMARY BELT OF WESTERLY FLOW ALOFT WILL REMAIN ACROSS SOUTHERN
CANADA AND THE NORTHERN TIER OF STATES. FARTHER SOUTH...A SLOW
MOVING UPPER LOW WILL CONTINUE TO MIGRATE EASTWARD FROM THE SOUTHERN
PLAINS TO THE AR/MO VICINITY...WHILE WATER VAPOR IMAGERY REFLECTS A
STRONGER SHORTWAVE TROUGH NEARING THE NORTHERN CA COAST THIS
AFTERNOON.
ACROSS THE LOWER/MIDDLE MISSISSIPPI VALLEY AND MID-SOUTH...SCATTERED
THUNDERSTORMS WILL CONTINUE TO DEVELOP THE REMAINDER OF THE
AFTERNOON ACROSS THE REGION. WHILE A WARM/MOIST AIRMASS WILL BE
CONDUCIVE FOR SOME STRONGER UPDRAFTS AND THE POSSIBILITY OF GUSTY
WINDS...POOR MID LEVEL LAPSE RATES AND RELATIVELY WEAK WIND FIELDS
/15-25 KT DEEP LAYER SHEAR/ ARE EXPECTED TO GREATLY LIMIT ANY SEVERE
POTENTIAL.
ELSEWHERE...ISOLATED TO SCATTERED THUNDERSTORMS WILL REMAIN POSSIBLE
INTO THIS EVENING ALONG/AHEAD OF A COLD FRONT ACROSS THE UPPER
MIDWEST. SEVERE TSTMS ARE NOT EXPECTED GIVEN MODEST BOUNDARY LAYER
MOISTURE /50S F DEWPOINTS/...A WARM ELEVATED MIXED LAYER/CAP AROUND
850 MB...AND WEAK VERTICAL SHEAR.
..GUYER.. 09/19/2008
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