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Mesoscale Discussion 1146
MD 1146 graphic
   
   MESOSCALE DISCUSSION 1146
   NWS STORM PREDICTION CENTER NORMAN OK
   0123 AM CDT FRI MAY 30 2003
   
   AREAS AFFECTED...NRN/CNTRL MN...NWRN WI
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 439...
   
   VALID 300623Z - 300730Z
   
   VAPOR IMAGERY SHOWS THE NOSE OF MIDLEVEL JET AND ASSOCIATED LARGE
   SCALE ASCENT CONTINUE TO SPREAD SEWD INTO THE UPPER MS VLY. 
   MIDLEVEL FLOW HAS WEAKLY RESPONDED WITH 700-500 MB FLOW BACKING JUST
   AHEAD OF THE MIDLEVEL JETLET.  THIS WARM ADVECTION REGIME IS
   SHIFTING ESEWD INTO ECNTRL MN AND NWRN WI AND IS SUPPORTING
   SCATTERED ELEVATED TSTMS.  MUCAPE VALUES ARE RATHER WEAK AND ASIDE
   FROM AN ISOLD NICKEL SIZED HAIL REPORT 9 NW BEMIDJI AROUND 0442
   UTC...TSTMS HAVE BEEN SUBSEVERE.  UNLESS AN UPSWING IN ACTIVITY
   OCCURS...WS 439 MAY BE CANCELLED EARLY.
   
   ..RACY.. 05/30/2003
   
   
   ATTN...WFO...DLH...MPX...FGF...
   
   45609504 48979723 48979303 45599106 45619499 
   
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