945 

FZUS73 KGRR 151013
MWSGRR

Marine Weather Statement
National Weather Service Grand Rapids MI
613 AM EDT Wed Apr 15 2026

LMZ844-878-151023-
/O.CAN.KGRR.MA.W.0017.000000T0000Z-260415T1045Z/
613 AM EDT Wed Apr 15 2026

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were...
  Nearshore and Open Waters from St Joseph to South Haven MI...

The thunderstorm has moved out of the warned area and no longer
poses a significant threat to boaters.

LAT...LON 4248 8625 4241 8628 4244 8636 4245 8683
      4278 8667 4277 8621
TIME...MOT...LOC 1013Z 258DEG 42KT 4264 8628

$$

LMZ845-874-876-151045-
/O.CON.KGRR.MA.W.0017.000000T0000Z-260415T1045Z/
613 AM EDT Wed Apr 15 2026

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 645 AM EDT...

For the following areas...
  Nearshore Waters from South Haven to Holland MI...
  Open Waters from South Haven to Grand Haven MI...

At 613 AM EDT, a severe thunderstorm was located near Saugatuck Pier
Heads, moving east at 40 knots.

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

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and
         suddenly higher waves. Large hail could result in
         structural damage.

The severe thunderstorm will remain over mainly open waters.

LAT...LON 4248 8625 4241 8628 4244 8636 4245 8683
      4278 8667 4277 8621
TIME...MOT...LOC 1013Z 258DEG 42KT 4264 8628

HAIL...>.75IN
WIND...40KTS

$$

JC






215 

FZUS73 KGRR 151036
MWSGRR

Marine Weather Statement
National Weather Service Grand Rapids MI
636 AM EDT Wed Apr 15 2026

LMZ845-874-876-151046-
/O.EXP.KGRR.MA.W.0017.000000T0000Z-260415T1045Z/
636 AM EDT Wed Apr 15 2026

...THE SPECIAL MARINE WARNING WILL EXPIRE AT 645 AM EDT...

The affected areas were...
  Nearshore Waters from South Haven to Holland MI...
  Open Waters from South Haven to Grand Haven MI...

The thunderstorm has weakened and no longer poses a significant
threat to boaters.

LAT...LON 4248 8625 4241 8628 4244 8636 4245 8683
      4278 8667 4277 8621
TIME...MOT...LOC 1036Z 258DEG 42KT 4269 8595

$$

JC