textproduct: Grand Rapids

KEY MESSAGES

- Chances for showers linger today across Southern Lower MI

- Wet weather mid week

DISCUSSION

Issued at 411 AM EDT Sun Jun 14 2026

- Chances for showers linger today across Southern Lower MI

Surface cold front is situated near I-96 at 400am with a slow progression to the south. We expect the front to pass out of the CWA and south of I-94 by mid morning. Some lingering showers and a few thunderstorms will be possible through that time. MUCAPE values at this early hour are still around 1,000 j/kg. By 15z MUCAPE values should dip to near zero as the better moisture clears to the south. Showers should end by about midday. The morning will have a fair amount of cloud cover but we will see more sun as the afternoon wears on. Dry conditions are expected from this afternoon through Monday night.

- Wet weather mid week

On Tuesday a mid level shortwave trough will take aim on the area from the west. This mid level wave will push a cold front into the area at the same time. Surface dew points will increase into the lower 60s, combined with cooling in the mid levels will result in MUCAPE values exceed 1,000 j/kg. A surge in the low level jet on Tuesday to around 40 knots makes severe weather a possibility (wind/hail are most likely). We are in a day 3 marginal from SPC at this point.

Upper troughing will linger into Wednesday and Thursday aloft with additional shortwaves working through the flow. At this point it looks like periodic showers and thunderstorms through the Tuesday through Thursday period. Models are still indicating a strong low moving through the Great Lakes region Wednesday night into Thursday. Rainfall amounts during the mid week period will likely approach or slightly exceed 1 inch in many areas. Highs during the work week look to stay in the 70s given cooler temperatures aloft.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 203 AM EDT Sun Jun 14 2026

A cold front is positioned across Central Lower Michigan at 06z dropping southward. A line of showers and thunderstorms precede the front over the I-96 corridor. We are not expecting much more in the way of showers and storms at KMKG, but the other 5 TAF sites will likely see showers and storms move through 12z. It may end up being that KGRR and KLAN will be the most affected. Overall, we expect conditions to mainly stay VFR. Winds will veer from southwest to west early this morning as the front creeps south. Some showers will likely linger along the I-94 TAF sites in the 12z to 16z time frame.

Thereafter, VFR weather will continue with the showers exiting to the south and east. Gusty west to northwest winds can be expected today at 14-26 knots.

MARINE

Issued at 411 AM EDT Sun Jun 14 2026

Will be issuing a Beach Hazards Statement and a Small Craft Advisory from Grand Haven to the south. Northwest winds will pick up today in the wake of a cold front into the 15 to 25 knot range. We expect waves to build to 3 to 5 feet around midday which will continue into the evening hours. North sides of north piers will be the most dangerous places to swim today such as North Beach in South Haven and Holland State Park. Winds and waves will fall to below advisory threshold for tonight and Monday.

GRR WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement from noon EDT today through this evening for MIZ056-064-071. MARINE...Small Craft Advisory from noon today to 8 PM EDT this evening for LMZ844>846.