WOUS64 KWNS 181913
WOU1  

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 221
NWS STORM PREDICTION CENTER NORMAN OK
313 PM EDT MON MAY 18 2026

SEVERE THUNDERSTORM WATCH 221 REMAINS IN EFFECT UNTIL 800 PM EDT
FOR THE FOLLOWING LOCATIONS

MIC001-007-009-011-015-017-019-025-029-031-035-037-039-045-047-
049-051-055-057-063-065-067-069-073-075-079-081-085-087-089-091-
093-099-101-107-111-113-115-117-119-123-125-129-133-135-137-141-
143-145-147-151-155-157-161-163-165-190000-
/O.CON.KWNS.SV.A.0221.000000T0000Z-260519T0000Z/

MI 
.    MICHIGAN COUNTIES INCLUDED ARE

ALCONA               ALPENA              ANTRIM              
ARENAC               BARRY               BAY                 
BENZIE               CALHOUN             CHARLEVOIX          
CHEBOYGAN            CLARE               CLINTON             
CRAWFORD             EATON               EMMET               
GENESEE              GLADWIN             GRAND TRAVERSE      
GRATIOT              HURON               INGHAM              
IONIA                IOSCO               ISABELLA            
JACKSON              KALKASKA            KENT                
LAKE                 LAPEER              LEELANAU            
LENAWEE              LIVINGSTON          MACOMB              
MANISTEE             MECOSTA             MIDLAND             
MISSAUKEE            MONROE              MONTCALM            
MONTMORENCY          NEWAYGO             OAKLAND             
OGEMAW               OSCEOLA             OSCODA              
OTSEGO               PRESQUE ISLE        ROSCOMMON           
SAGINAW              ST. CLAIR           SANILAC             
SHIAWASSEE           TUSCOLA             WASHTENAW           
WAYNE                WEXFORD             
$$


LCZ422-423-460-LEZ444-LHZ347-348-349-361-362-363-421-422-441-442-
443-462-463-464-LMZ323-342-344-190000-
/O.CON.KWNS.SV.A.0221.000000T0000Z-260519T0000Z/

CW 

.    ADJACENT COASTAL WATERS INCLUDED ARE

ST. CLAIR RIVER 

DETROIT RIVER 

LAKE ST. CLAIR OPEN LAKE (U.S. PORTION) 

MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI 

5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LIGHT MI INCLUDING
BOIS BLANC ISLAND 

PRESQUE ISLE LIGHT TO STURGEON PT MI INCLUDING THUNDER BAY
NATIONAL MARINE SANCTUARY 

STURGEON PT TO ALABASTER MI 

LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT 
TO THE US/CANADIAN BORDER BEYOND 5 NM FROM SHORE 

LAKE HURON FROM PRESQUE ISLE LT. TO STURGEON POINT  MI 5NM OFF
SHORE TO US/CANADIAN BORDER 

LAKE HURON FROM STURGEON POINT TO ALABASTER MI 5NM OFF SHORE TO
US/CANADIAN BORDER 

OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY 

INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI 

PORT AUSTIN TO HARBOR BEACH MI 

HARBOR BEACH TO PORT SANILAC MI 

PORT SANILAC TO PORT HURON MI 

LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH 5NM OFF SHORE TO THE
US/CANADIAN BORDER 

LAKE HURON FROM HARBOR BEACH TO PORT SANILAC 5NM OFF SHORE TO
US/CANADIAN BORDER 

LAKE HURON FROM PORT SANILAC TO PORT HURON 5NM OFF SHORE TO
US/CANADIAN BORDER 

GRAND TRAVERSE BAY SOUTH OF A LINE GRAND TRAVERSE LIGHT TO
NORWOOD MI 

NORWOOD MI TO 5NM WEST OF MACKINAC BRIDGE INCLUDING LITTLE
TRAVERSE BAY 

SLEEPING BEAR POINT TO GRAND TRAVERSE LIGHT MI 

$$


ATTN...WFO...APX...GRR...DTX...