SWODY1
SPC AC 100056
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0656 PM CST THU DEC 09 2010
VALID 100100Z - 101200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPPER AIR PATTERN CONTINUES TO DEAMPLIFY...WITH BROADLY CYCLONIC
FLOW AROUND ERN CONUS MEAN TROUGH. WNWLY UPPER JET IMPINGES UPON
PAC NW AND WILL EXTEND FARTHER INLAND OVER NRN ROCKIES NEAR END OF
PERIOD...AS HEIGHTS FALL THERE. SERIES OF EMBEDDED/LOW-AMPLITUDE
SHORTWAVES WILL CONTINUE TO MOVE ASHORE THROUGH REMAINDER
PERIOD...CONTRIBUTING TO THOSE HEIGHT FALLS...SE OF PERSISTENT
CYCLONIC GYRE CENTERED OFFSHORE QUEEN CHARLOTTE ISLANDS OF BC.
...WRN PAC NW...
INTERMITTENT SHOTS OF ENHANCED LARGE-SCALE ASCENT...ASSOCIATED WITH
SHORTWAVES EMBEDDED IN MID-UPPER FLOW BELT AND LEFT-EXIT REGION OF
STRENGTHENING UPPER JET MAX...WILL HELP TO MAINTAIN SRN FRINGE OF
COLD MIDLEVEL AIR MASS ASSOCIATED WITH NERN PAC UPPER LOW. AS
SUCH...AND IN COMBINATION WITH LOW-LEVEL MARINE MOISTURE...SPORADIC
THUNDER POTENTIAL WILL BE MAINTAINED FOR REMAINDER EVENING INTO
TONIGHT...FOR LOW-TOPPED CONVECTION MOVING ONSHORE FROM PAC. MLCAPE
SHOULD REMAIN GENERALLY BELOW 100 J/KG WITH FAST CELL
MOTIONS...LIMITING COVERAGE/DURATION OF TSTMS.
..EDWARDS.. 12/10/2010
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