SWODY1
SPC AC 291811
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1211 PM CST THU DEC 29 2011
VALID 292000Z - 301200Z
...NO TSTM AREAS FORECAST...
NO CHANGES TO THE PREVIOUS OUTLOOK. NO THUNDERSTORMS FORECAST.
..JEWELL.. 12/29/2011
.PREV DISCUSSION... /ISSUED 0931 AM CST THU DEC 29 2011/
...SYNOPSIS...
THE PROBABILITY FOR THUNDERSTORMS WILL BE LOW ACROSS THE NATION
TODAY. A FEW LIGHTNING STRIKES MAY OCCUR WITH A SHORTWAVE TROUGH
MOVING FROM THE NRN ROCKIES INTO THE CNTRL/NRN HIGH PLAINS THIS
MORNING INTO THE AFTERNOON. FARTHER W...A SECOND UPPER TROUGH WILL
APPROACH THE WA/ORE COAST TONIGHT...AIDING IN DESTABILIZATION ACROSS
THE AREA AS MIDLEVEL TEMPERATURES COOL. HOWEVER...ANY THUNDERSTORM
DEVELOPMENT IS EXPECTED TO BE BELOW 10 PERCENT COVERAGE ATTM. OVER
THE CNTRL/ERN CONUS...A SHORTWAVE IMPULSE LOCATED OVER THE MID/UPR
MS VALLEY REGION THIS MORNING WILL MOVE EWD INTO THE UPR OH VALLEY
BY EVENING...AND THEN MOVE OFFSHORE FROM THE MID-ATLANTIC REGION
TONIGHT. STEEP MIDLEVEL LAPSE RATES AND WEAK INSTABILITY WILL BE
COLLOCATED WITH THIS FEATURE OVER IN/OH DURING THE AFTERNOON...BUT
LIMITED MOISTURE WILL LIKELY PRECLUDE THUNDERSTORM DEVELOPMENT.
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