textproduct: Grand Rapids

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

KEY MESSAGES

- Next chance for rain Friday and Saturday

DISCUSSION

Issued at 141 AM EDT Wed Jul 29 2026

Quiet weather through Thursday under high pressure with the next chance for rain coming on Friday into the weekend. A shortwave trough rounds the top of the western CONUS ridge and closes off across or just south of the Great Lakes.

An associated surface low meandering across the Ohio Valley brings a moist easterly flow into Lower Michigan where mid level f-gen forcing and instability should bring rain and embedded thunderstorms with some diurnal enhancement on Saturday. Afternoon showers could linger into Sunday and even Monday before the upper low gets kicked out.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 141 AM EDT Wed Jul 29 2026

VFR conditions expected to continue through Wednesday evening. North winds AOB 10 knots today, except for some gusts to near 20 knots possible at MKG this afternoon.

MARINE

Issued at 129 AM EDT Wed Jul 29 2026

Winds and waves are diminishing and are or soon will be below 4 feet in all zones, so the SCA/BHS are expired. Waves could increase to 3 to 4 feet again at South Haven on Wednesday afternoon as north winds increase to near 20 knots.

Thursday to Saturday should see fairly light winds and waves with north winds increasing again on Sunday to near 20 knots.

GRR WATCHES/WARNINGS/ADVISORIES

MI...None. MARINE...None.

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