SWODY1
SPC AC 190034
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0734 PM CDT THU SEP 18 2008
VALID 190100Z - 191200Z
...NO SVR TSTM AREAS FORECAST...
LATEST WATER VAPOR IMAGERY SHOWS WLY FLOW IN PLACE ACROSS MUCH OF
THE CONUS WITH A WEAK UPPER-LEVEL LOW OVER THE CNTRL HIGH PLAINS. A
SHORTWAVE TROUGH IS ALSO LOCATED OVER THE NRN PLAINS. AT THE SFC...A
WELL-DEFINED TROUGH EXISTS OVER THE DAKOTAS WITH AN AXIS OF
LOW-LEVEL MOISTURE FROM NRN SD EXTENDING NEWD INTO NRN MN. A FEW
THUNDERSTORMS ONGOING NEAR THE SFC TROUGH ACROSS SWRN SD...MAY
PERSIST THROUGH LATE THIS EVENING. HOWEVER...THIS ACTIVITY SHOULD
DIMINISH DURING THE OVERNIGHT PERIOD. AS THE SHORTWAVE TROUGH MOVES
EWD INTO THE UPPER MIDWEST AND LOW-LEVEL FLOW INCREASES ASSOCIATED
WITH A LOW-LEVEL JET...ELEVATED THUNDERSTORMS SHOULD INITIATE AFTER
MIDNIGHT IN THE ERN DAKOTAS OR WRN MN. THIS ACTIVITY SHOULD PERSIST
THROUGH DAYBREAK BUT IS NOT EXPECTED TO BE ORGANIZED.
..BROYLES.. 09/19/2008
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