465
FZUS73 KGRB 210146
MWSGRB
MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
846 PM CDT MON JUL 20 2026
LMZ541-563-210200-
/O.CON.KGRB.MA.W.0041.000000T0000Z-260721T0200Z/
846 PM CDT MON JUL 20 2026
..SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 9 PM CDT
FOR THE FOLLOWING AREAS...
NEARSHORE WATERS FROM WASHINGTON ISLAND TO STURGEON BAY...
OPEN WATERS OF LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON
BAY...
AT 846 PM CDT, A SEVERE THUNDERSTORM CAPABLE OF PRODUCING WATERSPOUTS
WAS LOCATED 17 NM SOUTHEAST OF ROCK ISLAND, MOVING EAST AT 40 KNOTS.
HAZARD...WATERSPOUTS AND WIND GUSTS TO 40 KNOTS.
SOURCE...RADAR INDICATED.
IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY
HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY
HIGHER WINDS AND SUDDENLY HIGHER WAVES.
THIS STRONG THUNDERSTORM WILL REMAIN OVER MAINLY OPEN WATERS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO SAFE HARBOR UNTIL HAZARDOUS WEATHER PASSES.
LAT...LON 4533 8693 4530 8690 4531 8690 4533 8692
4534 8691 4533 8690 4533 8687 4536 8686
4539 8684 4540 8685 4540 8686 4541 8682
4541 8681 4536 8669 4533 8629 4513 8644
4509 8649 4520 8680 4532 8693
TIME...MOT...LOC 0118Z 290DEG 40KT 4538 8691
WATERSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 KTS
UHLMANN
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