SWOD48
SPC AC 190856
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0356 AM CDT THU APR 19 2007
VALID 221200Z - 271200Z
..DISCUSSION...
IT APPEARS ATTM THAT SEVERE WEATHER THREAT SHOULD BE RELATIVELY
LIMITED ACROSS THE MID AND UPPER MS VALLEY/WRN UPPER GREAT LAKES
REGION DAY 4 /SUN. APR. 22/ AS UPPER SYSTEM CONTRIBUTING TO THE
SEVERE WEATHER THREAT IN THE PLAINS DAY 3 LIFTS NEWD ACROSS A LESS
THERMODYNAMICALLY-FAVORABLE ENVIRONMENT.
BOTH THE GFS AND THE ECMWF SHOW ANOTHER SIGNIFICANT UPPER TROUGH/LOW
TO TRAVERSE THE ROCKIES INTO EARLY NEXT WEEK...WHICH IT APPEARS
SHOULD EMERGE INTO THE PLAINS AROUND DAY 6 /TUE. APR. 24/.
HOWEVER...LOCATION OF THIS FEATURE -- AND ASSOCIATED SURFACE
CYCLOGENESIS ARE DEPICTED DRASTICALLY DIFFERENT IN THE TWO MODELS.
AS A RESULT...DEGREE OF UNCERTAINTY PRECLUDES THE ISSUANCE OF A
SEVERE WEATHER AREA ATTM.
.GOSS.. 04/19/2007
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