SWODY2
SPC AC 231720
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1220 PM CDT FRI SEP 23 2011
VALID 241200Z - 251200Z
...NO SVR TSTM AREAS FORECAST...
AN UPPER-LEVEL LOW OVER THE SRN GREAT LAKES REGION SATURDAY IS
FORECAST TO RETROGRADE WWD INTO THE MID TO UPPER MS VALLEY. AT THE
SFC...A LOW IN THE GREAT PLAINS WILL DEEPEN AND MOVE SWD HELPING TO
REINFORCE SLY FLOW ACROSS LOWER TO MID-MS VALLEY. IN SPITE OF
THIS...MODEL FORECASTS KEEP THE GREATEST LOW-LEVEL MOISTURE AND
RESULTANT INSTABILITY ALONG THE IMMEDIATE GULF COAST EXTENDING NEWD
INTO THE CAROLINAS WHERE SOME THUNDERSTORM ACTIVITY WILL BE POSSIBLE
SATURDAY AFTERNOON. FORECAST SOUNDINGS ACROSS THE WARM SECTOR
SATURDAY SUGGEST THE COMBINATION OF INSTABILITY AND DEEP LAYER SHEAR
WILL BE TOO MARGINAL FOR SEVERE THUNDERSTORMS. ISOLATED
THUNDERSTORMS MAY ALSO DEVELOP SATURDAY AFTERNOON IN THE LOWER OH
VALLEY AND DESERT SOUTHWEST BUT THE FORECAST ENVIRONMENT IN THESE
TWO LOCATIONS ALSO APPEARS TO BE TOO MARGINAL FOR SEVERE STORMS
SATURDAY AFTERNOON.
..BROYLES.. 09/23/2011
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