SWODY2
SPC AC 271700
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM CDT SAT SEP 27 2008
VALID 281200Z - 291200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
WHILE AN UPPER TROUGH LINGERING OVER THE ERN CONUS IS FORECAST TO
CONTINUE TO WEAKEN/LIFT NEWD WITH TIME...A SECOND SHORT-WAVE TROUGH
IS EXPECTED TO AMPLIFY AS IT MOVES EWD ACROSS THE CANADIAN PRAIRIE.
AS THIS TROUGH EXPANDS SWD INTO THE N CENTRAL CONUS...AN ASSOCIATED
SURFACE TROUGH SHOULD LIKEWISE MOVE ACROSS THE N CENTRAL STATES.
ELSEWHERE -- ASIDE FROM THE STORM SYSTEM DEPARTING THE
NORTHEAST...GENERALLY BENIGN WEATHER IS FORECAST ACROSS THE CONUS.
...NEB AND THE MID MO VALLEY REGION...
SCATTERED SHOWERS AND THUNDERSTORMS ARE FORECAST TO DEVELOP FROM
PARTS OF MN SWWD INTO NEB/THE MID MO VALLEY -- PARTICULARLY DURING
THE SECOND HALF OF THE PERIOD -- INVOF THE SURFACE TROUGH ASSOCIATED
WITH THE STRENGTHENING UPPER FEATURE.
AS SOMEWHAT STRONGER MID-LEVEL FLOW SPREADS SEWD ACROSS THE MID MO
VALLEY REGION IN CONJUNCTION WITH THE UPPER TROUGH...INCREASING
SHEAR COMBINED WITH MODEST INSTABILITY MAY SUPPORT A FEW STRONGER
STORMS CAPABLE OF PRODUCING MARGINAL HAIL. THUS...WILL MAINTAIN LOW
PROBABILITY SEVERE THREAT ACROSS NEB AND VICINITY -- MAINLY FOR THE
EVENING/OVERNIGHT HOURS.
..GOSS.. 09/27/2008
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