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Mesoscale Discussion 1455
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   MESOSCALE DISCUSSION 1455
   NWS STORM PREDICTION CENTER NORMAN OK
   0241 AM CDT THU JUL 24 2014

   AREAS AFFECTED...PARTS OF ERN MT INTO NWRN ND

   CONCERNING...SEVERE THUNDERSTORM WATCH 437...

   VALID 240741Z - 240945Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 437
   CONTINUES.

   SUMMARY...A BAND OF STORMS -- INCLUDING EMBEDDED STRONG/SEVERE CELLS
   -- CONTINUES MOVING ENEWD ACROSS NERN MT...WITHIN WW 437.  ISOLATED
   SEVERE RISK MAY SPREAD EWD INTO NWRN ND OVER THE NEXT FEW
   HOURS...WHERE NEED FOR A NEW WW REMAINS UNCERTAIN.

   DISCUSSION...LATEST RADAR IMAGERY SHOWS A BAND OF STRONG/LOCALLY
   SEVERE STORMS MOVING ACROSS PHILLIPS/GARFIELD COUNTIES AND INTO
   VALLEY COUNTY MT ATTM...WITH THE STRONGEST STORMS NOW ON THE SRN
   EDGE OF THE BAND /OVER GARFIELD COUNTY/.  DAMAGING WINDS AND LARGE
   HAIL REMAIN POSSIBLE WITH THESE STORMS -- PARTICULARLY THE
   NEWLY-EVOLVING GARFIELD COUNTY CELLS.  

   THE STORMS -- SLIGHTLY ELEVATED ATTM ABOVE A STABILIZING BOUNDARY
   LAYER -- ARE MOVING THROUGH THE AXIS OF GREATEST MIXED-LAYER CAPE
   ATTM /PER OBJECTIVE ANALYSES/.  THAT SAID...AMPLE ELEVATED CAPE
   STILL RESIDES DOWNSTREAM INTO ND.  GIVEN ONGOING WARM ADVECTION
   ASSOCIATED WITH A SLY LOW-LEVEL JET SUPPORTING BACKGROUND ASCENT
   ACROSS THIS AREA...ISOLATED SEVERE STORMS /CAPABLE OF PRODUCING
   LARGE HAIL/ MAY INDEED SURVIVE/SPREAD ACROSS NWRN ND IN THE NEXT
   SEVERAL HOURS -- WHICH COULD REQUIRE DOWNSTREAM WW CONSIDERATION.

   ..GOSS/CORFIDI.. 07/24/2014


   ATTN...WFO...BIS...GGW...TFX...

   LAT...LON   46880737 49000867 49040412 48910212 48370060 47960048
               47550090 47550209 47370484 46900580 46880737 

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Page last modified: July 24, 2014
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