SWODY2
SPC AC 270624
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1224 AM CST SAT DEC 27 2008
VALID 281200Z - 291200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
A STRONG UPPER LOW/SHORT-WAVE TROUGH OVER THE UPPER GREAT LAKES
REGION AT THE START OF THE PERIOD IS FORECAST TO SHIFT NEWD ACROSS
ERN CANADA/NEW ENGLAND...WHILE A WEAKER SHORT-WAVE TROUGH MOVES
STEADILY ACROSS THE CENTRAL THIRD OF THE U.S. THROUGH THE PERIOD.
AT THE SURFACE...A COLD FRONT SHOULD INITIALLY LIE FROM THE LOWER
GREAT LAKES SSWWD ALONG THE W SLOPES OF THE APPALACHIANS TO THE
CENTRAL GULF COAST. THIS FRONT WILL SHIFT EWD IN CONJUNCTION WITH
THE INITIAL UPPER TROUGH...AND SHOULD MOVE OFF THE ATLANTIC COAST
FROM N-S THROUGH THE SECOND HALF OF THE PERIOD...LINGERING INVOF SRN
GA/NRN FL BY 19/12Z.
...CENTRAL APPALACHIANS/MID-ATLANTIC SWD INTO THE SOUTHEAST...
WHILE A MODESTLY-MOIST BOUNDARY LAYER /50S TO LOW 60S SURFACE
DEWPOINTS/ IS EXPECTED AHEAD OF THE FRONT FROM THE MID-ATLANTIC
REGION SWD...VERY WEAK LAPSE RATES AND ONGOING CLOUDS/PRECIPITATION
SUGGEST VERY LITTLE IF ANY POTENTIAL FOR DESTABILIZATION. THIS LACK
OF INSTABILITY COMBINED WITH THE PASSAGE OF THE UPPER SYSTEM WELL TO
THE N SUGGESTS THAT CONVECTIVE ACTIVITY ALONG THE FRONT SHOULD
REMAIN WEAK/SUB-SEVERE.
..GOSS.. 12/27/2008
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