743
WWUS20 KWNS 181657
SEL1
SPC WW 181657
MIZ000-LEZ000-LHZ000-LMZ000-190000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 221
NWS STORM PREDICTION CENTER NORMAN OK
100 PM EDT MON MAY 18 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
LOWER MICHIGAN
LAKE ERIE
LAKE HURON
LAKE MICHIGAN
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL
800 PM EDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 80 MPH POSSIBLE
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
A TORNADO OR TWO POSSIBLE
SUMMARY...A BAND OF THUNDERSTORMS OVER SOUTHERN LAKE MICHIGAN WILL
TRACK NORTHEASTWARD ACROSS THE WATCH, WHILE OTHER STORMS FORM OVER
NORTHERN LOWER MICHIGAN. ALL OF THESE STORMS WILL POSE A RISK OF
DAMAGING WIND GUSTS AND HAIL THROUGH THE AFTERNOON.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH OF JACKSON
MI TO 40 MILES NORTHWEST OF ALPENA 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 220...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
25035.
...HART
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