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
- Slow moving front brings rain, storms late week
- Upper High builds in early next week
DISCUSSION
Issued at 201 PM EDT Tue Jul 7 2026
- Slow moving front brings rain, storms late week
Quasi-zonal flow regime this week with upper height falls attending a slow-moving cold front sagging south through the Great Lakes. We will see chances for showers and thunderstorms from Wednesday night through Friday as the front becomes almost parallel to the flow.
By Thursday, training of storms could result in minor flooding but in most areas rainfall should be beneficial rather than excessive. Severe weather chances are marginal Wednesday night with limited instability and deep layer shear.
- Upper High builds in early next week
The rains should end across the southern zones over the weekend as the front sags south then large scale subsidence and drying begins with an upper high across the Northern Plains edging into Lower Michigan. Expect warm and dry for early next week before heights fall as an upper trough amplifies across eastern Canada.
AVIATION /06Z TAFS THROUGH 06Z THURSDAY/
Issued at 132 AM EDT Wed Jul 8 2026
Still just a weak signal in the models for patchy early morning shallow fog. Any such visibility restrictions will end shortly after sunrise. Expecting few to scattered clouds at or above 5,000 feet today. From the complex of storms currently in northwest Wisconsin, there is a slight chance of them reaching Ludington (LDM) as diminishing showers after 16 Z. Additional thunderstorms developing in Wisconsin this afternoon may nose in toward MKG to GRR after 00 Z, though this is only supported by a few models among the HREF. Any surviving shower or thunderstorm complex would produce some northwest shifts in wind against the prevailing light southwest winds.
MARINE
Issued at 201 PM EDT Tue Jul 7 2026
Fairly tranquil weather this week except for the possibility of thunderstorms with gusty winds and heavy downpours Wednesday night into Thursday morning. Wind direction will be frequently changing with north winds tonight going south on Wednesday then north again on Thursday and Friday, but generally remaining at or below 15 knots.
GRR WATCHES/WARNINGS/ADVISORIES
MI...Air Quality Alert until midnight EDT tonight for MIZ050-056-057- 064-065-071. MARINE...None.
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