SWODY2
SPC AC 150655
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CST TUE FEB 15 2011
VALID 161200Z - 171200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPPER TROUGH NEAR THE W COAST AT THE START OF THE PERIOD IS FORECAST
TO BEGIN EJECTING EWD INTO THE INTERMOUNTAIN WEST THIS PERIOD...AS
STRONG SHORTER-WAVELENGTH ENERGY DIVES SWD ALONG THE BACK SIDE OF
THE MAIN TROUGH. THE DIGGING FEATURES ON THE WRN FRINGE OF THE
EJECTING LARGER-SCALE FEATURE WILL ACT TO MAINTAIN THE ESTABLISHED
LONGWAVE TROUGH POSITION OVER THE ERN PAC/WRN CONUS.
AS THE SMALLER-SCALE WRN TROUGH BECOMES MORE PROGRESSIVE...RIDGING
WILL INCREASE ACROSS THE ERN CONUS...RESULTING IN A CONTINUATION OF
THE GENERALLY DRY/UNEVENTFUL WEATHER WHICH HAS PREVAILED IN MOST
AREAS E OF THE ROCKIES RECENTLY.
AT THE SURFACE...A COLD FRONT WILL SHIFT ACROSS THE GREAT BASIN
THROUGH THE PERIOD...IN CONJUNCTION WITH THE MOBILE WRN TROUGH.
ALONG WITH AN ISOLATED LIGHTNING STRIKE WITHIN SHOWERY PRECIPITATION
OVER THE INTERMOUNTAIN REGION...SHOWERS AND A GREATER POTENTIAL FOR
OCCASIONAL LIGHTNING WILL EXIST ALONG PARTS OF THE W COAST -- AND
PERHAPS INTO THE CA CENTRAL VALLEY DURING THE AFTERNOON. THE
CONVECTION...FUELED BY MINIMAL INSTABILITY ASSOCIATED WITH COOL
MID-LEVEL TEMPERATURES ACCOMPANYING THE UPPER TROUGH...WILL REMAIN
WEAK/LOW-TOPPED ACROSS ALL AREAS.
..GOSS.. 02/15/2011
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