SPC AC 161552
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1052 AM CDT WED SEP 16 2009
VALID 161630Z - 171200Z
...NO SVR TSTM AREAS FORECAST...
LITTLE OVERALL CHANGE IN LARGE SCALE BLOCKING PATTERN ACROSS THE
CONUS. DUAL CUT-OFF LOWS TRAPPED UNDER THE BLOCKING HIGH OVER NRN
HIGH PLAINS ARE FORECAST TO DRIFT SWD...ONE INTO CENTRAL AZ AND THE
OTHER OVER SWRN AR BACK INTO ERN TX.
CONDITIONS IN WARM SECTOR...CENTRAL GULF STATES HAVE CHANGED LITTLE
IN THE PAST SEVERAL DAYS...WITH A VERY MOIST/TROPICAL AIR MASS IN
PLACE AND JUST ENOUGH SHEAR BEING GENERATED BY THE CUT-OFF LOW TO
MAINTAIN A NON-ZERO THREAT OF ROTATING PRIMARILY DIURNAL
THUNDERSTORMS. THUS WILL CONTINUE WITH BOTH A LOW PROBABILITY OF
ISOLATED/BRIEF TORNADOS AND WET MICROBURSTS THIS AFTERNOON/EARLY
EVENING.
..HALES/GARNER.. 09/16/2009
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
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