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Severe Thunderstorm Watch 321
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WW0321 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Very Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Very Low Very 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.
   SEL1

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 321
   NWS Storm Prediction Center Norman OK
   905 PM EDT Mon Jun 12 2017

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Central Lower Michigan
     Lake Huron
     Lake Michigan

   * Effective this Monday night and Tuesday morning from 905 PM
     until 400 AM EDT.

   * Primary threats include...
     Isolated damaging wind gusts to 70 mph possible

   SUMMARY...A well-developed, occasionally severe, bowing arc of
   thunderstorms in eastern Wisconsin may survive its trek across a
   shallow/stable marine layer of Lake Michigan and pose a threat of
   damaging wind in Lower Michigan.

   The severe thunderstorm watch area is approximately along and 70
   statute miles north and south of a line from 45 miles southwest of
   Manistee MI to 5 miles north northeast of Bad Axe MI. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU1).

   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 317...WW 318...WW
   319...WW 320...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
   cumulonimbi with maximum tops to 450. Mean storm motion vector
   27035.

   ...Edwards
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Page last modified: June 13, 2017
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