SWOD48
SPC AC 010844
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0344 AM CDT THU MAY 01 2008
VALID 041200Z - 091200Z
...DISCUSSION...
INCREASING VARIATION IN PROGS OF INITIAL UPPER LOW TO AFFECT
WRN/CENTRAL CONUS -- DISCUSSED IN MORE DETAIL IN DAY 2-3 OUTLOOKS --
EXTENDS TO DAY-4/4TH-5TH PERIOD ACROSS ERN CONUS. SOME SVR INVOF
ASSOCIATED SFC FRONTAL ZONE CANNOT BE RULED OUT -- ESPECIALLY
PORTIONS CAROLINAS-DELMARVA AND PERHAPS MID-ATLANTIC REGIONS.
HOWEVER...LARGE SPREAD IN SOLUTIONS ALOFT IMPACTS LOW-MIDLEVEL MASS
FIELDS AND LENDS TOO MUCH UNCERTAINTY TO COVERAGE/INTENSITY OF SVR
FOR CATEGORICAL OUTLOOK AREA ATTM. NEXT SIGNIFICANT SYSTEM IS
PROGGED TO DEVELOP INTO CLOSED AND PERHAPS CUT-OFF LOW DAYS
5-6/5TH-7TH OVER SWRN CONUS. MORE PROGRESSIVE PROGS INDICATE
PATTERN FAVORABLE FOR SOME SVR POTENTIAL ACROSS PORTIONS SRN AND
PERHAPS CENTRAL PLAINS DAYS 6-7/6TH-8TH AS SYSTEM EJECTS IN RESPONSE
TO NEXT TROUGH DIGGING SWD OVER PACIFIC NW. TIMING AND TRACK OF ANY
SUCH EJECTION IS HIGHLY UNCERTAIN AND PRECLUDES OUTLOOK AREA THIS
FAR IN ADVANCE.
..EDWARDS.. 05/01/2008
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