ACUS48 KWNS 210856
SWOD48
SPC AC 210855
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0355 AM CDT FRI SEP 21 2012
VALID 241200Z - 291200Z
...DISCUSSION...
MEDIUM-RANGE MODELS IN UNUSUALLY GOOD AGREEMENT THROUGH THE
PERIOD...AS BOTH DEPICT GRADUAL DEAMPLIFICATION OF THE UPPER FLOW
PATTERN WITH TIME. THE LARGE UPPER CYCLONE INVOF HUDSON BAY AT THE
START OF THE PERIOD IS PROGGED TO SLOWLY WEAKEN/SHIFT EWD...LEAVING
A MUCH WEAKER FLOW FIELD ACROSS THE CONUS.
ALONG WITH THE WEAK FLOW FIELD ALOFT...A FAIRLY BENIGN SURFACE
PATTERN IS ALSO EXPECTED. GIVEN THIS BACKGROUND PATTERN...LITTLE
POTENTIAL IS EVIDENT FOR A HIGHER-END SEVERE EVENT...WHICH PRECLUDES
THE INCLUSION OF ANY THREAT AREAS THIS FORECAST.
..GOSS.. 09/21/2012
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