textproduct: Grand Rapids

KEY MESSAGES

- Chance of evening storms south/east of Grand Rapids

- Dry and mild Thursday into the middle of next week.

DISCUSSION

Issued at 222 PM EDT Wed May 27 2026

- Chance of evening storms south/east of Grand Rapids

Surface obs reveal a weak frontal boundary bisecting the Lower Peninsula roughly from Whitehall to Alma. Dewpoints are in the mid 40s north of the boundary and mid 50s south of there. SBCAPE is around 500 j/kg but is progd to increase to around 1000 j/kg by late afternoon. Thus we'll retain the low chance pops south of I-96 through the afternoon and early evening; severe storms are not expected. However, some gusty winds are possible given DCAPE near 900 j/kg.

- Dry and mild Thursday into the middle of next week.

an omega block will be in place for much of the next week with ridging over the Great Lakes. This means little chance of rainfall and warmer than normal temperatures. High temperatures in the mid to upper 70s and lows in the lower to mid 50s are expected. Dewpoints will be in the lower to mid 40s. Once the block breaks down, a cold front is progd to move through next Thursday which should be our next chance of rain.

AVIATION /00Z TAFS THROUGH 00Z FRIDAY/

Issued at 738 PM EDT Wed May 27 2026

A frontal boundary will continue to move through the south over the next few hours. The only aviation concern will be until 03Z. Given the uncertainty have put vicinity showers for GRR with Prob 30s for the southern TAF sites. Have timed out the line for some TEMPO periods of MVFR showers. Strong gusty northwest surface winds greater upwards of 30 knots remain possible. After 03Z expecting VFR to dominate the pattern.

MARINE

Issued at 222 PM EDT Wed May 27 2026

NNE winds will increase behind a frontal boundary that's draped across the central part of Lake MI as the boundary moves south. Winds may gust to 25 knots, especially north of Grand Haven later tonight and Thursday. We've issued a small craft advisory and beach hazards statement for the entire nearshore through 00z Friday.

GRR WATCHES/WARNINGS/ADVISORIES

MI...Beach Hazards Statement through Thursday evening for MIZ037-043- 050-056-064-071. MARINE...Small Craft Advisory until 8 PM EDT Thursday for LMZ844>849.