SWODY3
SPC AC 300701
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0201 AM CDT TUE SEP 30 2008
VALID 021200Z - 031200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
THE TRANSITION TO A LESS AMPLIFIED SPLIT UPPER FLOW PATTERN MAY
COMMENCE AS EARLY AS THURSDAY...AS THE EXIT REGION OF A STRONG ZONAL
MID LATITUDE PACIFIC JET NOSES TOWARD THE NORTHERN PACIFIC COAST.
CONSIDERABLE MODEL GUIDANCE INDICATES THAT WEAKENING OF THE SHARP
WESTERN NORTH AMERICAN RIDGE WILL CONTINUE...WHILE A BROAD
CIRCULATION WITHIN THE NORTHERN STREAM BEGINS TO LIFT AWAY FROM THE
GREAT LAKES INTO THE EASTERN CANADIAN PROVINCES.
UPPER TROUGHING WITHIN THE SOUTHERN STREAM IS PROGGED TO LINGER FROM
THE LOWER RIO GRANDE VALLEY INTO THE GULF OF MEXICO. WHILE THIS MAY
SUPPORT THE MAINTENANCE OF HIGH MOISTURE LEVELS ALONG A STALLED
FRONTAL ZONE NEAR THE SOUTHERN FLORIDA PENINSULA...THE DEVELOPMENT
OF A MOIST SOUTHERLY RETURN FLOW OFF THE GULF OF MEXICO WILL BE
IMPEDED.
CONVECTIVE POTENTIAL ACROSS MOST AREAS EAST OF THE ROCKIES APPEARS
LOW DURING THIS FORECAST PERIOD. AND...LOW MOISTURE LEVELS/WEAK
DESTABILIZATION WILL LIMIT CONVECTIVE POTENTIAL ACROSS THE WEST.
..KERR.. 09/30/2008
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