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Mesoscale Discussion 1074
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   MESOSCALE DISCUSSION 1074
   NWS STORM PREDICTION CENTER NORMAN OK
   0847 PM CDT WED JUN 18 2014

   AREAS AFFECTED...SE ND...ERN SD...WRN MN...FAR NW IA

   CONCERNING...TORNADO WATCH 322...327...328...

   VALID 190147Z - 190315Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH
   322...327...328...CONTINUES.

   SUMMARY...A TORNADO THREAT ALONG WITH POTENTIAL FOR LARGE HAIL AND
   WIND DAMAGE...ARE EXPECTED TO CONTINUE ACROSS SE ND AND ERN SD
   THROUGH LATE THIS EVENING. THE THREAT MAY PERSIST INTO THE OVERNIGHT
   PERIOD.

   DISCUSSION...THE LATEST SFC ANALYSIS SHOWS A 1002-MB LOW OVER ERN SD
   WITH A WELL-DEFINED INVERTED TROUGH EXTENDING NNWWD INTO SERN ND. A
   NEARLY CONTINUOUS LINE OF STORMS IS ONGOING ALONG THE TROUGH. THE
   STORMS ARE LOCATED IN A VERY MOIST ENVIRONMENT WITH SFC DEWPOINTS
   NEAR 70 F AND MLCAPE ESTIMATED FROM NEAR 2000 J/KG IN SE ND TO
   AROUND 4000 J/KG IN ERN SD. IN ADDITION TO THE STRONG
   INSTABILITY...REGIONAL WSR-88D VWPS SHOW VEERING WINDS WITH HEIGHT
   BELOW 3 KM WITH 0-3 KM STORM RELATIVE HELICITY AROUND 250 M2/S2.
   THIS STRONG LOW-LEVEL SHEAR SHOULD CONTINUE TO BE FAVORABLE FOR
   TORNADIC STORMS LATE THIS EVENING. IN ADDITION TO A FEW
   TORNADOES...LARGE HAIL AND WIND DAMAGE WILL ALSO BE POSSIBLE WITH
   SUPERCELLS OR SMALL BOWS EMBEDDED IN THE LINE.

   ..BROYLES/EDWARDS.. 06/19/2014


   ATTN...WFO...MPX...FGF...FSD...OAX...ABR...BIS...

   LAT...LON   43329849 42799752 42909567 43469509 45889561 46899729
               47399964 46610005 44659950 43879901 43329849 

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Page last modified: June 19, 2014
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