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Mesoscale Discussion 1677
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   MESOSCALE DISCUSSION 1677
   NWS STORM PREDICTION CENTER NORMAN OK
   0721 AM CDT THU SEP 04 2014

   AREAS AFFECTED...NERN MN...NRN WI

   CONCERNING...SEVERE THUNDERSTORM WATCH 493...

   VALID 041221Z - 041415Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 493
   CONTINUES.

   SUMMARY...SEVERE WIND AND HAIL WILL REMAIN POSSIBLE AS STORMS MOVE
   ACROSS NERN MN AND NRN WI THIS MORNING.

   DISCUSSION...STORMS WITH A HISTORY OF SIGNIFICANT SEVERE WINDS AND
   LARGE HAIL ARE APPROACHING THE ERN EDGE OF SEVERE THUNDERSTORM WATCH
   493. THESE STORMS ARE JUST N OF THE SFC WARM FRONT...WITH A WSWLY
   850 MB JET HELPING TO TRANSPORT MOISTURE AND INSTABILITY NEWD ACROSS
   WI. FAVORABLE DEEP-LAYER SHEAR EXISTS FOR THE SEVERE THREAT TO
   PERSIST DOWNSTREAM...AND ORIENTATION ROUGHLY ALONG THE WARM FRONT
   WILL FAVOR A SLIGHTLY SOUTH OF EAST MOTION.

   THE 12Z MPX SOUNDING SHOWS SUBSTANTIAL INSTABILITY BUT ALSO A STRONG
   CAPPING INVERSION WHICH SUGGEST STORMS ARE UNLIKELY TO DEVELOP S OF
   THE WARM FRONT UNTIL LATE AFTERNOON ALONG THE COLD FRONT.

   ..JEWELL.. 09/04/2014


   ATTN...WFO...MQT...GRB...DLH...ARX...MPX...

   LAT...LON   45919423 46259422 46689407 46699381 46569241 46429097
               46378979 46238888 46048842 45788776 45468737 45098724
               44608738 44398768 44428830 45029031 45349151 45919423 

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Page last modified: September 04, 2014
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