SWODY1
SPC AC 180039
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0739 PM CDT SUN APR 17 2011
VALID 180100Z - 181200Z
...NO TSTM AREAS FORECAST...
...SYNOPSIS...
QUASI-ZONAL FLOW ALOFT TO PREVAIL ACROSS THE U.S. THE REMAINDER OF
THE PERIOD...WITH LEE CYCLONE OVER THE SRN HIGH PLAINS TO SHIFT
ESEWD INTO OK THROUGH 18/12Z.
SHOWERS/ISOLATED THUNDERSTORMS CONTINUE TO DIMINISH ACROSS SERN FL
ATTM INVOF THE LINGERING SURFACE FRONT...AND SPORADIC LIGHTING IS
ALSO DIMINISHING FROM WY ESEWD INTO NEB AS THE COMPACT UPPER
SHORT-WAVE TROUGH SHIFTS TOWARD/INTO THE MID MO VALLEY.
LIKEWISE...THE ISOLATED LIGHTNING WITHIN LOW-TOPPED CONVECTION IN NY
AND VICINITY -- ASSOCIATED WITH THE MID-LEVEL LOW/COLD POOL -- HAS
ALSO WANED. THEREFORE...WITH ANY ADDITIONAL LIGHTNING IN THESE
AREAS LIKELY TO BE LIMITED AT BEST...WILL DROP ALL 10% THUNDER
FORECAST AREAS ATTM.
..GOSS.. 04/18/2011
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