SWODY1
SPC AC 311116
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0616 AM CDT WED MAR 31 2010
VALID 311300Z - 011200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS/DISCUSSION...
A STRONG UPPER TROUGH WILL AMPLIFY ACROSS THE WRN CONUS THROUGH THE
PERIOD...WITH A 120+ KT MID LEVEL SPEED MAX DIGGING SWD ACROSS THE
ERN PACIFIC. WELL AHEAD OF THE TROUGH...A BROAD AREA OF LOW PRESSURE
WILL DEEPEN FROM THE ERN GREAT BASIN INTO THE CNTRL HIGH PLAINS.
WITH A SURFACE RIDGE ACROSS THE GULF OF MEXICO...CONVECTIVE
INSTABILITY ACROSS THE CNTRL AND ERN U.S. WILL BE NEAR ZERO.
DAYTIME HEATING WILL COMBINE WITH COOL AIR ALOFT ACROSS THE PACIFIC
COAST STATES TO PRODUCE WEAK INSTABILITY BY EARLY AFTERNOON. ONLY
ISOLATED LIGHTNING STRIKES ARE EXPECTED MAINLY OVER HIGHER TERRAIN
OF THE PACIFIC NW AND INTO NRN CA.
AS THE ERN PACIFIC UPPER SPEED MAX DIGS SWD LATER TODAY...A SURFACE
LOW AND COLD FRONT WILL APPROACH THE CNTRL CA COAST. STRONG FORCING
AND WEAK INSTABILITY MAY RESULT IN A LINE OR CLUSTER OF
THUNDERSTORMS...BUT THE BULK OF THIS CONVECTION IS EXPECTED TO
REMAIN OFFSHORE.
FINALLY...ELEVATED INSTABILITY IS EXPECTED TO DEVELOP ACROSS ERN
WY...WRN NEB...AND WRN SD AFTER 00Z AS WARM ADVECTION PROFILES
INCREASE N OF A SURFACE LOW. INSTABILITY LEVELS WILL BE WEAK ENOUGH
THAT SEVERE STORMS OF ANY KIND ARE UNLIKELY.
..JEWELL.. 03/31/2010
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