SWOD48
SPC AC 280857
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0357 AM CDT THU AUG 28 2008
VALID 311200Z - 051200Z
THE MEDIUM RANGE MODELS ARE IN GENERAL AGREEMENT CONCERNING THE
DEVELOPMENT OF A RELATIVELY HIGH-AMPLITUDE UPPER-LEVEL TROUGH OVER
THE ROCKIES EARLY NEXT WEEK. THIS FEATURE IS FORECAST TO MOVE EWD
INTO THE NRN AND CNTRL PLAINS BY TUESDAY AND ACROSS THE UPPER
MIDWEST WEDNESDAY. ALTHOUGH STRONG VERTICAL SHEAR PROFILES AND
ABUNDANT LARGE-SCALE ASCENT WILL LIKELY BE PRESENT AS THE SYSTEM
EJECTS NEWD ACROSS THE PLAINS...THE AMOUNT OF INSTABILITY AVAILABLE
FOR CONVECTION REMAINS QUESTIONABLE. IF SUBSTANTIAL MOISTURE RETURN
TAKES PLACE ACROSS THE REGION BY EARLY NEXT WEEK AND MODERATE
DESTABILIZATION CAN DEVELOP AHEAD OF THE EJECTING TROUGH...A
REASONABLE CHANCE FOR SEVERE WEATHER SHOULD EXIST TUESDAY AND
TUESDAY NIGHT. HOWEVER...DUE TO QUESTIONS CONCERNING
INSTABILITY...WILL NOT FORECAST A SEVERE THREAT AREA ATTM.
..BROYLES.. 08/28/2008
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