SWOD48
SPC AC 270803
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0303 AM CDT SAT OCT 27 2007
VALID 301200Z - 041200Z
..SEVERE POTENTIAL APPEARS LOW INTO NEXT WEEKEND...
MEDIUM RANGE FORECAST GUIDANCE IS SUGGESTIVE THAT A GENERALLY ZONAL
SPLIT FLOW PATTERN ACROSS THE U.S. WILL BECOME AMPLIFIED BY THE END
OF THE FORECAST PERIOD. CONSIDERABLE VARIABILITY EXISTS CONCERNING
THE SMALLER SCALE PERTURBATIONS. BUT...LARGE-SCALE TROUGHING
APPEARS LIKELY TO EVENTUALLY DEVELOP ACROSS A LARGE PORTION OF THE
CENTRAL/EASTERN STATES. REGARDLESS AS TO JUST HOW THIS OCCURS...
MODELS INDICATE THAT THE EVOLVING PATTERN WILL FAVOR LOW-LEVEL
RIDGING OVER MUCH OF THE CENTRAL AND EASTERN STATES...AND LOW
PRESSURE OVER THE CARIBBEAN/SOUTHEASTERN GULF OF MEXICO...THROUGH
MUCH OF THE PERIOD. THIS WILL PRECLUDE A SIGNIFICANT INLAND RETURN
FLOW OF MOISTURE OFF THE GULF OF MEXICO. AND...WITH SURFACE CYCLONE
DEVELOPMENT ALONG FRONT NEAR/SOUTH OF THE FLORIDA PENINSULA
UNCERTAIN...SEVERE POTENTIAL IS EXPECTED TO REMAIN LOW THROUGH AT
LEAST EARLY NEXT WEEKEND.
.KERR.. 10/27/2007
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