69 - Knot Gusts Reported
Posted by JAC on 6/18/2010, 8:08 pm



MESOSCALE DISCUSSION 1013
  NWS STORM PREDICTION CENTER NORMAN OK
  0656 PM CDT FRI JUN 18 2010
 
  AREAS AFFECTED...EASTERN IL AND NORTHERN/CENTRAL INDIANA TO LOWER
  MI/WESTERN OH
 
  CONCERNING...SEVERE THUNDERSTORM WATCH 344...345...
 
  VALID 182356Z - 190130Z
 
  THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
  344...345...CONTINUES.
 
  SEVERE TSTM WATCHES 344/345 CONTINUE UNTIL 04Z/05Z
  RESPECTIVELY...WITH WIDESPREAD DAMAGING WINDS THE DOMINANT CONCERN
  THROUGH MID EVENING.
 
  CONSIDERABLE LINEAR MCS/LONG DURATION WIND-PRODUCING DERECHO
  CONTINUES TO STEADILY PROGRESS EASTWARD AT AROUND 40 KT ACROSS
  SOUTHERN LOWER MI/NORTHEAST INDIANA AS OF 2345Z...WITH THE
  TRAILING/SOMEWHAT SLOWER MOVING SOUTHWESTERN PORTION OF THE LINE
  SPREADING SOUTHEASTWARD ACROSS CENTRAL INDIANA. CONSIDERABLE WIND
  GUSTS HAVE BEEN COMMON SINCE THIS AFTERNOON...MOST RECENTLY
  INCLUDING MEASURED GUSTS OF 69 KT AT THREE RIVERS MI /HAI/...53 KT
  AT GOSHEN INDIANA...64 KT AT SOUTH BEND INDIANA...AND 54 KT AT
  BENTON HARBOR MI.
 
  A STRONGLY HEATED/MOIST MCS-LEADING AXIS EXTENDS NORTHEASTWARD INTO
  FAR NORTHWEST OH/MUCH OF SOUTHEAST MI...FROM A RESERVOIR OF STRONG
  INSTABILITY /3000-4000 J PER KG MLCAPE/ ACROSS CENTRAL INDIANA. A
  FAVORABLE ENVIRONMENT/ADEQUATE SHEAR...COMBINED WITH
  MCS-ORGANIZATIONAL ASPECTS OF A STRONG COLD POOL/REAR INFLOW JET AND
  OVERALL FORWARD MOMENTUM...WILL SUSTAIN WIDESPREAD WIND DAMAGE
  POTENTIAL  VER THE NEXT SEVERAL HOURS ESPECIALLY ACROSS SOUTHERN
  LOWER MI /MAINLY SOUTH OF I-96/...EAST CENTRAL INDIANA...AND
  NORTHWEST/WEST CENTRAL OH.
 
  ..GUYER.. 06/18/2010
17
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Chicago and Areas-West Under-the-Gun this Afternoon - JAC, 6/18/2010, 12:06 pm
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