SWOD48
SPC AC 130857
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0357 AM CDT MON SEP 13 2010
VALID 161200Z - 211200Z
...DISCUSSION...
PER 00Z ECMWF/GEFS GUIDANCE...A NEARLY ZONAL/LOW AMPLITUDE LARGE
SCALE FLOW REGIME WILL BE PREVALENT INTO THE WEEKEND. INITIALLY ON
DAY 4/THURSDAY...IT IS CONCEIVABLE THAT SOME SEVERE TSTMS WILL BE
POSSIBLE ACROSS PORTIONS OF THE OH/TN RIVER VALLEYS...AND PERHAPS
SOUTHERN PLAINS...ALONG/AHEAD OF AN ADVANCING COLD FRONT.
HOWEVER...AN APPRECIABLE SEVERE RISK IS NOT ANTICIPATED. OTHER
SEVERE TSTMS COULD BE POSSIBLE ACROSS PORTIONS OF THE CENTRAL
PLAINS/MIDWEST BY AROUND DAYS 5 AND/OR 6 THURSDAY/FRIDAY AS MOISTURE
RETURNS NORTHWARD ACROSS THE REGION...BUT
AGAIN...PREDICTABILITY/POTENTIAL IS LIMITED WITHIN A LARGELY
ZONAL/LOW AMPLITUDE LONGWAVE REGIME.
..GUYER.. 09/13/2010
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