Wednesday, December 8, 2010

DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 090437
SWODY1
SPC AC 090435

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1035 PM CST WED DEC 08 2010

VALID 091200Z - 101200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
AN UPPER TROUGH ALONG THE ERN SEABOARD WILL SHIFT EWD OVER THE WRN
ATLANTIC OCEAN. IN ITS WAKE...LOW-AMPLITUDE FLOW WILL OVERSPREAD
MUCH OF THE CONUS.

GENERALLY QUIESCENT WEATHER CONDITIONS ARE EXPECTED ACROSS MOST OF
THE COUNTRY TODAY AS MAINLY STABLE/DRY AIR MASSES PREVAIL. ONE
EXCEPTION WILL BE ACROSS PARTS OF THE PACIFIC NORTHWEST WHERE A
STRONG MID/UPPER LEVEL JET WILL CONTINUE TO STREAM ONSHORE. MOIST
ONSHORE FLOW ALONG WITH OROGRAPHIC LIFT /NWRN OREGON AND WRN
WASHINGTON COASTS/ WILL COMBINE WITH LIMITED BUT SUFFICIENT
INSTABILITY /LESS THAN 500 J/KG MUCAPE/ AND COLD MID LEVEL TEMPS TO
PRODUCE A FEW/SCATTERED EMBEDDED THUNDERSTORMS.

THE OTHER EXCEPTION MAY BE NEAR THE E COAST OF FLORIDA.
THUNDERSTORMS MAY DEVELOP IN AN AREA OF WEAK CYCLOGENESIS RELATED TO
THE PASSAGE OF THE MID/UPPER LEVEL TROUGH. HOWEVER...THE BULK OF
THIS ACTIVITY IS EXPECTED TO REMAIN WELL OFFSHORE.

..EDWARDS/STOPPKOTTE.. 12/09/2010

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