textproduct: Grand Rapids

KEY MESSAGES

- Dry Weather Continues Through Thursday

- Showers and Storms Possible Friday and Saturday

- Warm and Dry into next week

DISCUSSION

Issued at 204 AM EDT Wed Jun 3 2026

- Dry Weather Continues Through Thursday

An Omega block high will to dominate the weather pattern through Thursday. A surface high will slowly drift southward as a strengthening upper level low moves along the US and Canada border. Warm and dry weather with light winds will continue through this timeframe.

- Showers and Storms Possible Friday and Saturday

The above mentioned upper level low will erode the high pressure and force it to slink to the southeast. The upper level pattern will be fairly flat with a mid and low level ribbon of moisture. That ribbon will finally make its way through Lower Michigan Friday. Max diurnal temps will continue to peak into the 80s on Friday. That warm air, with some instability and moisture should allow for showers and storms Friday afternoon into the evening hours. Models remain consistent. While the dry lower levels will take a bit to moisten up, the consistent flow should allow for showers through the evening. However, Saturday will be the better day for storms. There remains some questions on timing but given the mid range models, there will be a more amplified upper level short wave. That trough will dig into the Great lakes and the mid and lower levels could tap into instability from a long wave trough emanating from a low sitting along the eastern seaboard of Canada. Latest models show decent MUCAPE Saturday afternoon. This is a good indicator for potential storm growth, so strong to severe thunderstorms on Saturday will be possible. As stated in previous discussions, the area of most concern will be southern Lower Michigan. There remains questions of timing and position of the LLJ through this timeframe and the depth of the moisture aloft.

- Warm and Dry into next week

The break in the warm and dry pattern will be short with more high pressure returning Sunday through the first half of the week. Another Omega block high will build over the Great lakes region. That high will keep any advancing systems at bay, forcing any incoming moisture around the region. It will also keep temperatures in the mid to upper 80s, which is around 10 degrees above normal.

AVIATION /12Z TAFS THROUGH 12Z THURSDAY/

Issued at 652 AM EDT Wed Jun 3 2026

High pressure will allow VFR to dominate the pattern through the forecast period. Winds will shift this evening but overall speed will be less than 10 kts. Next chance for reducing conditions will be Friday afternoon/evening.

MARINE

Issued at 244 AM EDT Wed Jun 3 2026

Fair winds and waves in high pressure will continue into Thursday. Winds will steadily ramp up from Thursday into Friday with 20-30 knot winds likely by Friday out of the southwest. Sub advisory conditions are expected tonight through at least Thursday morning. Thursday afternoon into Friday conditions will increase to advisory. Winds and waves could flirt with gales by Friday evening.

GRR WATCHES/WARNINGS/ADVISORIES

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