textproduct: Grand Rapids

KEY MESSAGES

- Isolated showers ending, then dry into next week

- Much warmer next week

DISCUSSION

Issued at 136 PM EST Fri Nov 13 2026

- Isolated showers ending, then dry into next week

Radar continues to show a dominant lake band moving south over Lake MI, but appears to be just west of the Points. A weaker band of light rain showers from Lake Huron was moving SSW over Portland. All of the precipitation will continue to weaken tonight and Saturday morning.

The lake-induced precipitation has been a ramification of colder air brought south within the deep flow of an upper trough. Boundary layer flow is generally from the NNE and so that has limited the areal extent of precipitation across the cwa. The models show a general rex block across the northern US, but also show it breaking down this weekend as a strong short wave is ejected eastward from the deep eastern Pacific trough. The result will be ridging that will build over the Great Lakes and end the precipitation. We'll see a gradual reduction of cloud cover as the weekend progresses and quite a bit of sunshine next week.

- Much warmer next week

H8 temperatures currently near -6c are progd to warm to around +8c by Thursday as heights rise under the upper ridge. That will result in surface highs climbing from the upper 40s this weekend to lower to mid 50s early next week to around 60 toward the end of the week Highs by next Thursday will be 10-15 degrees above normal.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/

Issued at 158 PM EST Fri Nov 13 2026

MVFR conditions continue to linger with marginal low cu across southeast Lower Michigan with ceilings. Expect improvement to VFR there as the afternoon continues Winds will continue out of the north. Lake effect rain and snow showers should remain over Lake Michigan. Another round of MVFR cigs will overspread the region late tonight into tomorrow morning.

GRR WATCHES/WARNINGS/ADVISORIES

MI...None. MARINE...Small Craft Advisory until 7 AM EST Saturday for LMZ844>849.