textproduct: Grand Rapids

KEY MESSAGES

- Unsettled With Several Chances of Showers and Thunderstorms Through Thursday

- More Widespread Rainfall Potential This Weekend

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 144 PM EDT Mon Aug 10 2026

Daytime heating, coupled with a moist boundary layer aided by overnight rainfall, has resulted in a SC cloud deck with MVFR ceilings /around 2kft/ at all TAF sites. With continued warming this afternoon, expect SC to lift to VFR CU deck /around 3.5 kft/ after 19-20Z. Stationary front over the Lower Great Lakes will continue to serve as focal for scattered storms next 24 hr, with the next round of thunderstorms potentially moving into SW Lower /including the AZO-BTL TAF sites/ after 02-03Z this evening. Yet another round of storms may be approaching AZO/BTL/GRR after 16Z Tuesday, but will not include in TAFs at this time.

Otherwise, expect SCT-BKN mid clouds tonight north of the boundary, along with 2-4SM vsbys in fog after 06-07Z. Winds will remain light throughout TAF period, with westerly flow becoming variable tonight.

MARINE

Issued at 144 PM EDT Mon Aug 10 2026

Conditions look to remain below Small Craft Advisory/Beach Hazards Statement levels much of the week given weak gradient flow across the area. The one caveat is that one or more rounds of thunderstorms are likely between tonight and Thursday across the waters. Locally higher winds and waves are possible in any thunderstorms or as a result of their outflow winds even if they miss our part of the lake. Marine headlines may be needed Friday Night into the weekend as a more robust system crosses the Central Great Lakes.

GRR WATCHES/WARNINGS/ADVISORIES

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