The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Click for Watch Status Reports
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 354
NWS Storm Prediction Center Norman OK
600 PM CDT Mon Aug 27 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Much of Upper Michigan
* Effective this Monday night and Tuesday morning from 600 PM
until 100 AM CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail events to 1.5 inches in diameter possible
A tornado or two possible
SUMMARY...A convective cluster will likely continue eastward along
the shore of Lake Superior through the late evening hours, with an
attendant threat for damaging winds. Farther southwest, a larger
thunderstorm line/cluster now crossing the Mississippi River will
continue across Wisconsin and Upper Michigan into the overnight
hours. Damaging winds will be the main threat, though an isolated
tornado or two cannot be ruled out with circulations embedded within
the larger clusters/lines.
The severe thunderstorm watch area is approximately along and 105
statute miles north and south of a line from 35 miles west southwest
of Rhinelander WI to 45 miles northeast of Escanaba MI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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
OTHER WATCH INFORMATION...CONTINUE...WW 353...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector