SWODY2
SPC AC 250525
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1225 AM CDT SAT OCT 25 2008
VALID 261200Z - 271200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS AND FORECAST...
FULL LATITUDE TROUGH /ANCHORED BY VORTEX OVER JAMES BAY/ WILL
UNDERGO CONSIDERABLE AMPLIFICATION DURING THE DAY TWO PERIOD AS
STRONG SHORT WAVE TROUGH AND ATTENDANT 110-120 KT MIDLEVEL JET
STREAK DIG SEWD FROM THE S-CNTRL CANADIAN PRAIRIES INTO THE OH AND
TN VALLEYS. AT THE SURFACE...A STRONG COLD FRONT WILL ACCOMPANY
THIS SHORT WAVE TROUGH SEWD WITH THIS BOUNDARY PUSHING AS FAR AS THE
ATLANTIC COAST AND NRN GULF OF MEXICO BY MONDAY MORNING.
MESOSCALE ASCENT ALONG THE COLD FRONT SHOULD BE SUFFICIENT TO
SUSTAIN A BAND OF CONVECTION EWD ACROSS THE GREAT LAKES SUNDAY INTO
SUNDAY NIGHT. ASIDE FROM LAKE SUPERIOR...CURRENT LAKE WATER
TEMPERATURES RANGE FROM 10-15 C. SENSIBLE HEAT AND MOISTURE FLUXES
FROM THE LAKE SURFACES COMBINED WITH CONSIDERABLE COOLING IN THE
MID-TROPOSPHERE WILL RESULT IN THE DEVELOPMENT OF STEEP LAPSE RATES
AND WEAK CONVECTIVE INSTABILITY ALONG AND IN THE WAKE OF SURFACE
FRONT. AS SUCH...A FEW OF THE DEEPER CONVECTIVE ELEMENTS WILL BE
CAPABLE OF LIGHTNING. MOREOVER...SOME SMALL HAIL OR GRAUPEL WILL BE
POSSIBLE AS WELL AS LOCALLY STRONG WIND GUSTS.
ELSEWHERE...A FEW TSTMS WILL BE POSSIBLE SUNDAY MORNING OVER S FL
PRIOR TO THE INTRUSION OF A COOLER AND DRIER CONTINENTAL AIR MASS
FROM THE N.
..MEAD.. 10/25/2008
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