SWOD48
SPC AC 120849
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0349 AM CDT THU APR 12 2007
VALID 151200Z - 201200Z
..DISCUSSION...
UPR FLOW REGIME WILL REMAIN QUITE ENERGETIC WITH A NUMBER OF
SHORTWAVE TROUGHS TRAVERSING NORTH AMERICA DURING THE NEXT WEEK OR
SO. THE UPPER TROUGH EXPECTED TO BE IMPETUS FOR SEVERE WEATHER
DURING THE END OF THE WEEK ACROSS THE SRN PLAINS TO THE SERN STATES
WILL CLOSE OFF INTO A LOW AGAIN BY SUNDAY NEAR THE MID-ATLANTIC.
THIS FEATURE WILL THEN MOVE NWD INTO NEW ENGLAND THROUGH EARLY NEXT
WEEK. DEEP NWLY FLOW ALOFT IN WAKE OF THIS SYSTEM WILL SEND A
CONTINENTAL POLAR AIR MASS SWD INTO THE GULF OF MEXICO.
NEXT IN A SERIES OF UPPER TROUGHS WILL QUICKLY MOVE SEWD INTO THE
SRN PLAINS BY MON-TUE NEXT WEEK. BUT...SHORT WAVELENGTHS BETWEEN
TROUGHS WILL PROBABLY NOT ALLOW AMPLE TIME FOR QUALITY MOISTURE TO
WORK NWWD. NONETHELESS...STEEP LAPSE RATES AND FAST FLOW ALOFT MAY
YIELD ISOLD-SCT TSTMS...SOME OF WHICH COULD BE SVR...OVER PARTS OF
THE SRN PLAINS EARLY NEXT WEEK. BUT...THIS SCENARIO DOES NOT FALL
INTO THE FRAMEWORK OF A MEDIUM RANGE SVR OUTLOOK.
.RACY.. 04/12/2007
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