textproduct: Grand Rapids

KEY MESSAGES

- Dry weather through Thursday

- Chances for showers and storms Friday into the weekend

- Near to slightly above normal temperatures

DISCUSSION

Issued at 226 PM EDT Mon Jun 1 2026

- Dry weather through Thursday

High pressure settles into the area tonight from the north. The high will remain in place into Wednesday. Skies will be mainly clear from Tonight through Tuesday night. The high will slowly move off to the east Wednesday into Thursday, but we will remain dry given the lack of low level moisture. Pleasant weather is expected, unless you are looking for rain.

- Chances for showers and storms Friday into the weekend

Rain chances increase beginning Thursday night, but especially Friday into the weekend. A boundary will sag into the area from the north Thursday into Friday, taking on warm frontal characteristics Saturday into Saturday night. Showers and thunderstorms are possible from Thursday night through Sunday, but Saturday and Sunday look to have the best chances. MUCAPE values look to reach the 1,000 to 2,000 j/kg range both days. That said when you get out to Sunday there are some timing and strength differences with a weak low and front moving through the region. These differences are tied to the handling of the upper pattern during this time frame with respect to a wave moving through the northern tier of the country. Bottom line, dry for the next few days and then turning more unsettled towards the end of the week and the weekend.

- Near to slightly above normal temperatures

Temperatures look to be around 80 to the lower 80s much of the next 7 days. 850mb temps warm from +8C to +10C over the next 24 hours to well into the teens C as we work through next weekend. We have flipped the calendar to June and the temperatures will be in tune with summer.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 140 PM EDT Mon Jun 1 2026

VFR conditions are expected with few-scattered daytime cumulus with bases 7,000 to 8,000 feet having just developed. Winds will be from the northeast around 5 to 10 knots, except near Lake Michigan where winds will be more from the north-northwest. A push of breezier 10 to 15 knot winds off Lake Huron / Saginaw Bay is expected for several hours this evening.

MARINE

Issued at 226 PM EDT Mon Jun 1 2026

Surface high pressure will drop into the Great Lakes from the north out of Ontario tonight. The high will remain situated over the area then both Tuesday and Wednesday. We will see sub advisory conditions on Lake Michigan through Wednesday. Waves will largely be 2 feet or less through Wednesday. Waves will increase both this evening and Tuesday evening to around 2 feet as thermal differences between the land and the lake are maximized.

GRR WATCHES/WARNINGS/ADVISORIES

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