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Severe Thunderstorm Watch 423
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WW0423 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
High Moderate
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.
   SEL3

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 423
   NWS Storm Prediction Center Norman OK
   545 PM CDT Wed Jul 19 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 Wednesday afternoon from 545 PM until Midnight
     CDT.

   * Primary threats include...
     Widespread damaging winds likely with isolated significant gusts
       to 80 mph possible
     Isolated very large hail events to 2 inches in diameter possible
     A tornado or two possible

   SUMMARY...A fast-moving linear convective system will continue to
   race east/southeastward across the region this evening with the
   possibility of widespread damaging wind gusts, along with some hail
   and a brief MCS-embedded tornado risk.

   The severe thunderstorm watch area is approximately along and 60
   statute miles north and south of a line from 50 miles west northwest
   of Dubuque IA to 50 miles south southeast of Racine WI. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU3).

   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 420...WW 421...WW 422...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
   few cumulonimbi with maximum tops to 600. Mean storm motion vector
   30050.

   ...Guyer
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Page last modified: July 20, 2017
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