583
WHUS53 KGRR 180150
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LMZ844>847-872-874-876-878-180445-
/O.NEW.KGRR.MA.W.0019.260418T0150Z-260418T0445Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Grand Rapids MI
950 PM EDT Fri Apr 17 2026

The National Weather Service in Grand Rapids has issued a

* Special Marine Warning for...
  Nearshore and Open Waters from St Joseph to Whitehall MI...

* Until 1245 AM EDT.

* At 950 PM EDT, strong thunderstorms were located along a line
  extending from 20 nm east of North Pt. Lt. to 10 nm east of
  Winthrop Harbor to 8 nm east of Wilmette Harbor, moving east at 30
  knots.

  HAZARD...Wind gusts to 40 knots and small hail.

  SOURCE...Radar.

  IMPACT...Small craft could be damaged in briefly higher winds and
           suddenly higher waves.

* Locations impacted include...
  South Haven Light, St. Joseph Light, White Lake Pier Heads, Mona
  Lake Channel, Holland Light, The White Lake Pierheads, Muskegon
  Light, and St. Joseph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4213 8656 4212 8696 4337 8714 4340 8643
      4312 8627 4277 8621 4248 8625 4225 8635
      4211 8649
TIME...MOT...LOC 0150Z 262DEG 31KT 4308 8740 4247 8757 4208 8749

HAIL...<.75IN
WIND...40KTS

$$

NJJ