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Severe Thunderstorm Watch 645
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WW0645 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Low Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL5

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 645
   NWS Storm Prediction Center Norman OK
   230 PM EDT Wed Sep 11 2019

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Central and Southern Lower Michigan
     Southern Wisconsin
     Lake Erie
     Lake Huron
     Lake Michigan

   * Effective this Wednesday afternoon and evening from 230 PM
     until 1100 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Thunderstorms are expected to intensify across southern
   Wisconsin and the southern half of Lower Michigan this afternoon,
   with multiple rounds of strong to severe storms.  Damaging winds
   will be the main threat in the most intense cells.

   The severe thunderstorm watch area is approximately along and 55
   statute miles north and south of a line from 25 miles east of Mount
   Clemens MI to 10 miles north of Lonerock WI. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU5).

   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
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   28025.

   ...Hart
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Page last modified: September 12, 2019
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