421
WHUS53 KGRB 210227
SMWGRB
LMZ541-563-210330-
/O.NEW.KGRB.MA.W.0044.260721T0227Z-260721T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
927 PM CDT MON JUL 20 2026
THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A
* SPECIAL MARINE WARNING FOR...
NEARSHORE WATERS FROM WASHINGTON ISLAND TO STURGEON BAY...
OPEN WATERS OF LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON
BAY...
* UNTIL 1030 PM CDT.
* AT 927 PM CDT, SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
WATERSPOUTS WERE LOCATED ALONG A LINE FROM 13 NM SOUTHEAST OF
DETROIT ISLAND TO 8 NM EAST OF WHITEFISH POINT, MOVING EAST AT 55
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 4497 8719 4501 8714 4507 8712 4505 8709
4506 8708 4509 8709 4508 8707 4509 8705
4512 8705 4514 8708 4516 8707 4513 8705
4515 8703 4516 8705 4524 8704 4521 8700
4525 8697 4526 8698 4511 8646 4485 8670
TIME...MOT...LOC 0227Z 287DEG 52KT 4518 8669 4509 8660 4485 8703
WATERSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 KTS
UHLMANN
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