643  
WHUS53 KDLH 152351  
SMWDLH  
LSZ140>143-150-162-160045-  
/O.NEW.KDLH.MA.W.0006.250515T2351Z-250516T0045Z/  
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SPECIAL MARINE WARNING  
NATIONAL WEATHER SERVICE DULUTH MN  
651 PM CDT THU MAY 15 2025  
 
THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A  
 
* SPECIAL MARINE WARNING FOR...  
GRAND MARAIS TO TACONITE HARBOR MN...  
GRAND PORTAGE TO GRAND MARAIS MN...  
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND PORTAGE  
MN BEYOND 5NM...  
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND...  
SILVER BAY HARBOR TO TWO HARBORS MN...  
TACONITE HARBOR TO SILVER BAY HARBOR MN...  
 
* UNTIL 745 PM CDT.  
 
* AT 651 PM CDT, STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE  
EXTENDING FROM 9 NM SOUTHWEST OF SUGAR LOAF COVE TO 6 NM NORTHEAST  
OF DEVILS ISLAND TO 16 NM EAST OF MADELINE ISLAND, MOVING NORTHEAST  
AT 35 KNOTS.  
 
HAZARD...WIND GUSTS 34 KNOTS OR GREATER AND SMALL HAIL.  
 
SOURCE...RADAR.  
 
IMPACT...SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND  
SUDDENLY HIGHER WAVES.  
 
* LOCATIONS IMPACTED INCLUDE...  
ROCKY ISLAND, IRONWOOD ISLAND, SUGAR LOAF COVE, TOFTE SAFE HARBOR,  
STOCKTON ISLAND, DEVILS ISLAND, TOFTE, TACONITE HARBOR, CAT ISLAND,  
MOUTH OF THE CROSS RIVER, SOUTH TWIN ISLAND, NORTH TWIN ISLAND,  
GRAND MARAIS HARBOR, OUTER ISLAND, MICHIGAN ISLAND, OTTER ISLAND,  
AND MANITOU ISLAND.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT FOR NORTHWESTERN  
WISCONSIN.  
 
MOVE TO SAFE HARBOR UNTIL HAZARDOUS WEATHER PASSES.  
 
 
 
LAT...LON 4699 9065 4725 9123 4740 9117 4757 9090  
4772 9055 4778 9031 4766 9004 4750 8988  
4673 9039  
TIME...MOT...LOC 2351Z 211DEG 35KT 4735 9107 4713 9058 4684 9030  
 
HAIL...<.75IN  
WIND...>34KTS  
 
 
 
UNRUH  
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