SWOD48
SPC AC 290817
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0217 AM CST THU NOV 29 2007
VALID 021200Z - 071200Z
..DISCUSSION...
LATEST MEDIUM-RANGE GUIDANCE REMAINS RELATIVELY CONSISTENT IN THE
EWD PROGRESSION OF MID-LEVEL TROUGH FROM THE HIGH PLAINS REGION AT
THE BEGINNING OF DAY 4 /SUN DEC 2ND/ THROUGH THE MS VALLEY AND INTO
THE OH AND TN VALLEYS BY THE BEGINNING OF DAY 5 /MON DEC 3RD/.
ACCOMPANYING COLD FRONT WILL PUSH SEWD THROUGH THE OH/TN VALLEYS AND
GULF COAST STATES WITH SOME POTENTIAL FOR A FEW SEVERE STORMS MAINLY
OVER THE LOWER MS VALLEY ON SUNDAY INTO SUNDAY NIGHT. MODEL
GUIDANCE CONTINUES TO INDICATE THAT INSTABILITY WITHIN PRE-FRONTAL
WARM SECTOR WILL REMAIN QUITE WEAK WHICH WILL LIKELY LIMIT A MORE
WIDESPREAD SEVERE WEATHER EPISODE.
THEREAFTER...DIFFERENCES ARISE IN THE EVOLUTION OF THE LONG WAVE
PATTERN...THOUGH IT DOES APPEAR THAT SOME DEGREE OF TROUGHING WILL
BE MAINTAINED ACROSS ERN N AMERICA. NO ADDITIONAL SEVERE WEATHER
EVENTS ARE ANTICIPATED THROUGH THE REMAINDER OF THE EXTENDED PERIOD.
.MEAD.. 11/29/2007
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