SWOD48
SPC AC 200828
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0328 AM CDT FRI APR 20 2007
VALID 231200Z - 281200Z
--ORGANIZED SEVERE WEATHER EPISODES WILL BE POSSIBLE OVER THE
SRN/CNTRL HIGH PLAINS MONDAY...APRIL 23RD...THE SRN/CNTRL PLAINS
TUESDAY...APRIL 24TH AND THE ARKLATEX INTO LOWER MS VALLEY
WEDNESDAY...APRIL 25TH.--
..DISCUSSION...
DESPITE SLIGHT DIFFERENCES IN TIMING...LATEST MEDIUM RANGE GUIDANCE
IS RELATIVELY CONSISTENT IN INTENSIFYING UPPER TROUGH OVER THE
ROCKIES ON DAY 4 /APRIL 23RD/...SHIFTING IT E INTO THE CNTRL/SRN
PLAINS ON DAY 5 /APRIL 24TH/...AND THEN DEAMPLIFYING IT AS IT
TRANSLATES EWD THROUGH THE REMAINDER OF THE EXTENDED PERIOD.
VERTICAL SHEAR WILL CORRESPONDINGLY INCREASE ACROSS A SUFFICIENTLY
MOIST WARM SECTOR SUCH THAT IT APPEARS THAT MULTIPLE SEVERE STORM
EPISODES WILL BE POSSIBLE.
THE GREATEST SEVERE WEATHER POTENTIAL APPEARS TO BE ON
MONDAY...APRIL 23RD OVER THE CNTRL/SRN HIGH PLAINS...TUESDAY...APRIL
24TH OVER THE SRN INTO CNTRL PLAINS AND THEN ON WEDNESDAY...APRIL
25TH OVER THE ARKLATEX INTO LOWER MS VALLEY. THEREAFTER...SOME
SEVERE WEATHER POTENTIAL WILL EXIST ALONG THE CNTRL/ERN GULF
COAST...THOUGH UNCERTAINTY IN EVOLUTION OF SYNOPTIC SYSTEM IS SUCH
THAT NO ADDITIONAL DAYS WILL BE DELINEATED.
.MEAD.. 04/20/2007
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