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Severe Thunderstorm Watch 537
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WW0537 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 537
   NWS Storm Prediction Center Norman OK
   925 PM CDT Sun Sep 18 2022

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northern and central Illinois

   * Effective this Sunday night and Monday morning from 925 PM
     until 400 AM CDT.

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

   SUMMARY...Clusters of supercells near the Mississippi River will
   continue to move east-southeastward through the overnight hours into
   northern and central Illinois, with some upscale growth possible. 
   Large hail will be the primary initial threat, while damaging winds
   will be possible with the more intense supercells and any larger
   clusters that evolve from the ongoing storms.

   The severe thunderstorm watch area is approximately along and 70
   statute miles east and west of a line from 40 miles west northwest
   of Marseilles IL to 50 miles south southeast of Springfield IL. 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.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 536...

   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 550. Mean storm motion vector
   29035.

   ...Thompson
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Page last modified: September 19, 2022
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