SWODY1
SPC AC 220045
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0645 PM CST FRI NOV 21 2008
VALID 220100Z - 221200Z
...NO TSTM AREAS FORECAST...
...GREAT LAKES...
SHALLOW CONVECTION WILL GRADUALLY WEAKEN OVER THE GREAT LAKES AS
HEIGHTS RISE AND THERMODYNAMIC PROFILES BECOME MORE HOSTILE AND
LAPSE RATES WEAKEN. IF ANY LIGHTNING OCCURS DURING THE OVERNIGHT
HOURS IT WILL BE VERY SPARSE AND MOST LIKELY LIMITED TO ERN PARTS OF
LAKE ERIE OR PERHAPS LAKE ONTARIO.
...WA COAST...
STRONG FRONTAL BAND IS QUICKLY APPROACHING COASTAL WA. 00Z SOUNDING
FROM UIL HAS YET TO DEPICT ANY MEANINGFUL INSTABILITY NOTED ALONG
LEADING EDGE OF FRONTAL BAND...THOUGH A VERY SHALLOW LAYER OF CAPE
IS NOTED IF LIFTING A PARCEL NEAR 700MB. LATEST LIGHTNING DATA DOES
DEPICT A FEW THUNDERSTORMS ABOUT 35MI SW OF UIL...THOUGH THIS
ACTIVITY HAS BEEN WEAKENING AS IT APPROACHES THE COAST. CONTINUED
WEAKENING IS EXPECTED AS FRONTAL BAND MOVES ONSHORE THUS A GENERAL
THUNDER FORECAST WILL NOT BE WARRANTED THE REST OF THE PERIOD.
..DARROW.. 11/22/2008
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