textproduct: Grand Rapids

KEY MESSAGES

- Dry through Labor Day

- Chance of showers/storms Tuesday night/Wednesday

DISCUSSION

Issued at 258 AM EDT Sun Sep 6 2026

- Dry through Labor Day

IR loop shows clear skies across the region as high pressure moves overhead. A light east wind is advecting drier air in from Ontario and we'll see humidity levels lower today, along with cooler temperatures; highs will be in the upper 70s. Low temperatures tonight will fall into the mid 40s in the northeast cwa and lower to mid 50s elsewhere. A building high over the central US will begin to drift east on Labor Day and temperatures will rise a few degrees, but still remain near normal highs in the upper 70s.

- Chance of showers/storms Tuesday night/Wednesday

The high will continue to be nudged eastward and flattened aloft as an upper short wave pushes a cold front into the western Great Lakes. We're beginning to get into the time of year that cold fronts from the west have stronger support aloft due to higher temperature gradients between southern Canada and the northern half of the US and thus create more lift as they collide with the warmer, more humid airmass to the south. The models show this occurring Tuesday night as a cold front moves south into Lower MI. Precipitation chances rise to 70-80 percent Tuesday night and Wednesday morning. Another half inch of rain looks possible as the front moves through.

The latter half of the week looks dry as high pressure builds into the Great Lakes. Highs in the upper 70s will be common Wednesday through Friday.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 151 AM EDT Sun Sep 6 2026

Skies are generally clear across the region. Northeast winds are advecting drier air in from Canada. JXN has already dropped to 2sm br, but bounced back to VFR. This will likely happen a few more times overnight. It's possible that other terminals may drop to MVFR in fog too, but confidence was low enough to omit from the TAFs. Since JXN was already IFR, we kept it in the TAF. Once the fog burns off shortly after sunrise, VFR conditions are expected the rest of the day as high pressure builds into the region.

MARINE

Issued at 258 AM EDT Sun Sep 6 2026

Wind and waves will continue to be fairly light through Labor Day due to high pressure moving overhead. However, once the high moves east Tuesday, winds will increase and a small craft advisory will probably be needed.

GRR WATCHES/WARNINGS/ADVISORIES

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