textproduct: Grand Rapids

KEY MESSAGES

- Showers ending, then dry for a few days

- Mid week precipitation chances and beyond

DISCUSSION

Issued at 254 AM EDT Sun Aug 2 2026

- Showers ending, then dry for a few days

Regional radar shows much of the rain as dissipated north of a Kalamazoo to Mason line. South of there, local radar showed a deformation band of light to moderate rain. This will persist this morning before it moves southeast out of the cwa late this morning as the upper trough axis swings through. High pressure will then build into the cwa and we'll see sunny weather return Monday and Tuesday.

Highs will top out around 80 late this afternoon and then we'll be in the lower to mid 80s Monday and Tuesday. Humidity will be held in check Monday and Tuesday as dewpoints will remain in the 50s.

- Mid week precipitation chances and beyond

The upper ridge will move east during the middle of the week and an upper trough pattern will develop and persist through next weekend. That's generally an unsettled pattern for the Great Lakes as short waves rotate through the trough and act as a catalyst for shower/storm development. Additionally, the upper trough helps to push cold fronts through the region and they too help to generate storms. Also true, is this type of pattern is difficult to pin down timing wise as some of the short waves can be innocuous and some more pronounced. So, as we look toward mid week, models are showing a cold front drifting south across the Lower Peninsula. We'll likely see some shower/storm development Wednesday afternoon/evening and then again over the weekend as another front moves south across the state.

Given upper troughing in place, highs will remain in the 80s.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 145 AM EDT Sun Aug 2 2026

Radar shows a diminishing trend across much of the cwa, except in the southeast where deformation processes are in play; showers will linger near JXN into the afternoon.

Expecting sub 1k cigs to continue/develop at the terminals early this morning and then rise to MVFR late morning and VFR during the afternoon. Conditions will improve as the upper trough axis pivots through the state.

MARINE

Issued at 254 AM EDT Sun Aug 2 2026

No changes to the marine headlines. As upper troughing moves east, high pressure will build into the Great Lakes. Typically, we see an increase in winds and waves as this occurs and today shouldn't be any different.

Yesterday, waves were highest off shore. However as winds become northwesterly today, those higher waves will begin to move closer to the shore and become hazardous to beach goers.

GRR WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement from this afternoon through late tonight for MIZ037-043-050-056-064. Beach Hazards Statement through late tonight for MIZ071. MARINE...Small Craft Advisory until 2 AM EDT Monday for LMZ844. Small Craft Advisory from 2 PM this afternoon to 2 AM EDT Monday for LMZ845>849.