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Severe Thunderstorm Watch 342
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WW0342 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL2

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 342
   NWS Storm Prediction Center Norman OK
   1025 PM CDT Fri Jun 16 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Eastern Iowa
     Northern Illinois
     Southern Wisconsin
     Lake Michigan

   * Effective this Friday night and Saturday morning from 1025 PM
     until 500 AM CDT.

   * Primary threats include...
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible
     Isolated damaging wind gusts to 70 mph possible

   SUMMARY...A weak mid-level disturbance or two combined with
   residually steep lapse rates and moderate deep-layer shear will
   continue to pose at least an episodic severe risk mainly in the form
   of large hail and locally damaging winds as storms spread eastward
   late this evening into the overnight.

   The severe thunderstorm watch area is approximately along and 60
   statute miles east and west of a line from 30 miles northwest of
   Milwaukee WI to 45 miles west southwest of Moline IL. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU2).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 341...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 600. Mean storm motion vector
   28025.

   ...Guyer
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Page last modified: June 17, 2017
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