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Mesoscale Discussion 1126
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   MESOSCALE DISCUSSION 1126
   NWS STORM PREDICTION CENTER NORMAN OK
   0816 PM CDT MON JUN 22 2015

   AREAS AFFECTED...SERN IA...NERN MO...NRN IL

   CONCERNING...TORNADO WATCH 335...

   VALID 230116Z - 230215Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 335 CONTINUES.

   SUMMARY...SEVERE THREAT CONTINUES ACROSS ALL BUT THE NWRN THIRD OF
   WW335.

   DISCUSSION...LONG-LIVED SUPERCELL...WITH POTENTIAL TORNADO AT
   TIMES...IS TRACKING SEWD ACROSS NRN IL.  THIS STORM APPEARS TO BE
   INFLUENCED BY EARLIER MCS THAT HAS DECAYED AND SHIFTED DOWNSTREAM
   INTO THE LOWER GREAT LAKES REGION.  LONGER RADAR DATA SUGGESTS THE
   DEMARCATION OF THIS EARLIER MCS EXTENDS ACROSS LAKE COUNTY
   INDIANA...NWWD THROUGH WILL COUNTY IL INTO KENDALL COUNTY IL AHEAD
   OF AFOREMENTIONED SUPERCELL.  IT APPEARS CURRENT TRACK OF THIS
   LONG-LIVED SUPERCELL WILL MOVE ALONG THIS CORRIDOR INTO NRN LA SALLE
   COUNTY THEN INTO SRN KENDALL/NRN GRUNDY COUNTY IL OVER THE NEXT
   HOUR.

   OTHER ISOLATED SUPERCELLS EXTEND SWWD AHEAD OF WIND SHIFT INTO NERN
   MO WHERE LARGER CLUSTER OF STORMS IS EVOLVING ALONG SWRN FLANK OF
   THIS ACTIVITY MOVING INTO WW337.

   ..DARROW.. 06/23/2015


   ATTN...WFO...LOT...ILX...LSX...DVN...DMX...EAX...

   LAT...LON   42319331 41348828 39618824 40579331 42319331 

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Page last modified: June 23, 2015
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