[MCD] SWOMCD

[Mesoscale Convective Discussions]

ACUS11 KWNS 212058
SWOMCD
SPC MCD 212057 
CAZ000-212300-

MESOSCALE DISCUSSION 0607
NWS STORM PREDICTION CENTER NORMAN OK
0357 PM CDT FRI APR 21 2006

AREAS AFFECTED...NORTHERN/CENTRAL CA

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 212057Z - 212300Z

THREAT FOR ISOLATED HAIL WILL INCREASE REMAINDER OF THE AFTERNOON
ACROSS INTERIOR PORTIONS OF NORTHERN/CENTRAL CA. A WATCH IS NOT
CURRENTLY ANTICIPATED...HOWEVER WILL CONTINUE TO MONITOR CONVECTIVE
TRENDS.

WATER VAPOR IMAGERY FEATURES UPPER LOW JUST OFF THE CENTRAL CA
COAST. AS THIS LOW NEARS THE COAST...MID LEVEL LAPSE RATES WILL
CONTINUE TO STEEPEN INTO INTERIOR CA. INITIAL THUNDERSTORM
DEVELOPMENT IS ALREADY NOTED EAST OF THE BAY AREA...WITH INCREASING
CONVECTIVE COVERAGE EXPECTED THROUGH LATE AFTERNOON FROM THE COASTAL
AREAS INTO THE SACRAMENTO/SAN JOAQUIN VALLEYS. PROGRESSIVELY COOL
TEMPERATURES ALOFT COUPLED WITH A MILD BOUNDARY LAYER AND UPPER
40S/LOWER 50S DEWPOINTS WILL LEAD TO POTENTIAL FOR MOST UNSTABLE
CAPES IN EXCESS OF 1000 J/KG PER ADJUSTED RUC SOUNDINGS...ESPECIALLY
IN AREAS FROM SACRAMENTO/STOCKTON AND SOUTH. PRIMARY SEVERE HAZARD
IS LIKELY TO BE HAIL THROUGH EARLY EVENING...ALTHOUGH A FEW FUNNELS
MAY BE POSSIBLE AS WELL.

..GUYER.. 04/21/2006

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...HNX...STO...MTR...

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