SWODY3
SPC AC 150604
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1204 AM CST SAT NOV 15 2008
VALID 171200Z - 181200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
PRONOUNCED TROUGH -- ANALYZED AT 06Z FROM UPPER MS VALLEY SSWWD
ACROSS ARKLATEX -- IS EXPECTED TO EJECT OFFSHORE ATLANTIC COAST
DAY-2...PRECEDED BY STG SFC COLD FRONT. MEANWHILE...NRN STREAM
SHORTWAVE TROUGH -- INITIALLY APPARENT IN MOISTURE CHANNEL IMAGERY
OVER AK PANHANDLE -- IS EXPECTED TO MOVE THROUGH NERN NORTH AMERICAN
MEAN RIDGE POSITION. AS THIS TROUGH DIGS SEWD ACROSS OH VALLEY AND
CENTRAL/SRN APPALACHIANS THIS PERIOD...REINFORCING MEAN TROUGH OVER
ERN CONUS...COLD AIR ALOFT WILL OVERSPREAD PORTIONS GREAT LAKES AND
MAY STEEPEN LAPSE RATES ENOUGH TO ENABLE VERY ISOLATED/BRIEF
THUNDER. HOWEVER...LOW LEVEL AIR MASS IN WAKE OF DAY-1/DAY-2 COLD
FRONT -- DOMINATED BY LARGE/CONTINENTAL ANTICYCLONE -- WILL BE TOO
DRY AND/OR STABLE TO SUPPORT SVR CONVECTION.
..EDWARDS.. 11/15/2008
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