textproduct: Grand Rapids

KEY MESSAGES

- Breezy Saturday with a small chance of showers

- Showers and Storms Possible Tuesday through midweek

DISCUSSION

Issued at 258 PM EDT Fri Sep 11 2026

- Breezy Saturday with a small chance of showers

Not a whole lot of change in the short range pattern. A mid level trough emanating from an upper level low will swing through the region tomorrow. This will bring stronger flow through northern lower Michigan Saturday afternoon. A stronger gradient will set up. That gradient will bring gusty winds, 20 to 30 mph, to the region with the strongest winds expected along and north of the I 96 corridor. The best moisture will be north of the US 10 corridor with only a small chance of showers southward.

- Showers and Storms Possible Tuesday through midweek

A significant upper level system will eject out of the northern rockies and swing through Canada early next week. Latest model trends show the cold front associated with this system stalls. Frontal passage through the Great Lakes should be closer to Tuesday.

This system will bring best chance for precipitation with showers and storm possible Tuesday. The frontal pattern continues to show the potential to stall with the boundary draping across southern Michigan through IN and IL. That stalled frontal boundary, its associated moisture and the fact that there could be decent warm air advection could bring a prolonged period of shower/storm activity midweek into Thursday.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 158 PM EDT Fri Sep 11 2026

VFR conditions will dominate the pattern through the first half of the TAF period. Light and variable winds are expect overnight. Another round of shallow ground fog is likely at the southern TAF sites. A strong inversion will once again be present at JXN, and at AZO and BTL overnight into Saturday morning. Expect MVFR to IFR vsbys forming around 08Z to 10Z and lifting between 12Z to 14Z. A system moving northward late morning into the afternoon could bring in some mid to low clouds tomorrow.

MARINE

Issued at 258 PM EDT Fri Sep 11 2026

Winds and waves will increase tomorrow ahead the approaching cold front. Have issued a Small Craft Advisory and a beach hazards for areas north of Grand Haven. Winds and waves will subside Saturday night. Stronger winds are expected next week as another system approaches. Gales are possible late Monday into Tuesday.

GRR WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement from Saturday morning through Saturday evening for MIZ037-043-050. MARINE...Small Craft Advisory from 8 AM to 8 PM EDT Saturday for LMZ847>849.