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Severe Thunderstorm Watch 407
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WW0407 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.
   SEL7

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 407
   NWS Storm Prediction Center Norman OK
   355 PM CDT Mon Jul 10 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northern Illinois
     Northern and Central Indiana
     Lake Michigan

   * Effective this Monday afternoon and evening from 355 PM until
     1100 PM CDT.

   * Primary threats include...
     Isolated very large hail events to 2 inches in diameter possible
     Isolated damaging wind gusts to 70 mph possible
     A tornado or two possible

   SUMMARY...Scattered strong thunderstorms are expected to develop
   across northern Illinois over the next few hours. This activity
   should mature and spread southeast into Indiana with an attendant
   threat of large hail and damaging winds this evening.

   The severe thunderstorm watch area is approximately along and 50
   statute miles north and south of a line from 60 miles north
   northwest of Peoria IL to 5 miles east northeast of Muncie IN. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU7).

   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.

   &&

   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 500. Mean storm motion vector
   28030.

   ...Darrow
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Page last modified: July 11, 2017
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