670
WHUS53 KGRR 242021
SMWGRR
LMZ849-868-242115-
/O.NEW.KGRR.MA.W.0035.250824T2021Z-250824T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
421 PM EDT SUN AUG 24 2025
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A
* SPECIAL MARINE WARNING FOR...
NEARSHORE AND OPEN WATERS FROM PENTWATER TO MANISTEE MI...
* UNTIL 515 PM EDT.
* AT 419 PM EDT, A STRONG THUNDERSTORM PRODUCING WATERSPOUTS WAS
LOCATED NEAR BIG SABLE POINT LIGHT, MOVING SOUTHEAST AT 10 KNOTS.
HAZARD...WATERSPOUTS.
SOURCE...WEBCAM. AT 419 PM A WATERSPOUT WAS VISIBLE OFF OF THE BIG
SABLE LIGHTHOUSE WEBCAM.
IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY
HAZARDOUS SEAS.
* LOCATIONS IMPACTED INCLUDE...
LUDINGTON LIGHT, BIG SABLE POINT LIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THUNDERSTORMS CAN PRODUCE SUDDEN WATERSPOUTS RESULTING IN LOCALLY
HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY.
LAT...LON 4423 8664 4411 8644 4407 8651 4405 8652
4397 8646 4388 8644 4382 8653 4410 8682
TIME...MOT...LOC 2019Z 316DEG 11KT 4411 8666
WATERSPOUT...OBSERVED
HAIL...0.00IN
WIND...<34KTS
THOMAS
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