SPC Severe Thunderstorm Watch 495

WW 495 SEVERE TSTM MI LS 252300Z – 260500Z

WW 0495 Image

Severe Thunderstorm Watch Number 495
NWS Storm Prediction Center Norman OK
700 PM EDT Fri Sep 25 2020

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Western Upper Michigan
  Lake Superior

* Effective this Friday night and Saturday morning from 700 PM
  until 100 AM EDT.

* 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...Thunderstorms have begun to form along the shores of Lake
Superior, along a warm front.  These storms will track toward the
Keweenaw Peninsula this evening, with a risk large hail, damaging
winds, and perhaps a tornado.

The severe thunderstorm watch area is approximately along and 40
statute miles east and west of a line from 75 miles southwest of
Houghton MI to 35 miles north northwest of Houghton MI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU5).


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


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 450. Mean storm motion vector


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