textproduct: Grand Rapids

KEY MESSAGES

- Rain Mid-Week then Cooler

DISCUSSION

Issued at 237 PM EDT Sun Oct 11 2026

- Rain Mid-Week then Cooler

Showers are moving off to the east of Lower Michigan on Sunday afternoon, but a thin deck of stratocu remains. Upper ridging with fair and warm weather continues into Monday before a shortwave trough rides over the top of the ridge with a low pressure center tracking across the central Great Lakes on Tuesday. Showers are possible in an area of warm advection Monday night into Tuesday but the steadier rain associated with an area of frontogenesis appears to move across northern Lower Michigan.

Another chance for rain comes on late Tuesday and early Wednesday across the southern forecast area as a trailing cold front moves through and stalls. This is followed by another low moving along the front and bringing rain on Thursday. Cooler air moves in as an upper trough digs across the eastern CONUS by the end of the week.

AVIATION /00Z TAFS THROUGH 00Z TUESDAY/

Issued at 714 PM EDT Sun Oct 11 2026

IR loop shows the back edge of the stratus deck slowly moving southeast. BTL will be the next to clear out...probably by 00z. LAN/JXN will take several more hours to clear out. JXN may clear out briefly, but then models show a signal for another brief period of IFR/LIFR cigs overnight before clearing out again after sunrise.

MARINE

Issued at 237 PM EDT Sun Oct 11 2026

Winds and waves will increase on Monday and conditions may be hazardous to small craft at times Monday night and Tuesday.

GRR WATCHES/WARNINGS/ADVISORIES

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