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WWUS20 KWNS 201805

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URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 151

NWS Storm Prediction Center Norman OK

205 PM EDT Thu Apr 20 2017



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Northeast Indiana

  South central and southeast Lower Michigan

  Northwest Ohio

  Lake Erie



* Effective this Thursday afternoon and evening from 205 PM until

  800 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...Clusters of strong/severe storms will continue to develop

through the afternoon from Indiana into southern Lower Michigan and

northwestern Ohio.  Occasional damaging gusts and large hail will be

the main concerns through the afternoon and into this evening.



The severe thunderstorm watch area is approximately along and 80

statute miles east and west of a line from 15 miles northwest of

Detroit MI to 50 miles south southwest of Findlay OH. 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.



&&



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 450. Mean storm motion vector

26030.



...Thompson

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