Sumner, Michigan Weather Forecast Discussion

285
FXUS63 KGRR 111115
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
715 AM EDT Thu Sep 11 2025
.KEY MESSAGES...
- Chance of Rain Saturday
&&
.DISCUSSION...
Issued at 156 AM EDT Thu Sep 11 2025
- Chance of Rain Saturday
Overall dry pattern continues into next week with only a chance
of showers Saturday morning. Convection forms on the nose of a LLJ
across Wisconsin late Friday night and translates east-southeast
across Lower Michigan Saturday morning. POPS amd QPF will be
limited however as the LLJ is weakening. Instability and shear
profiles also suggest thunder chances are isolated at best.
The majority of the next several days will see sfc high pressure
edging down from Canada with dry north or northeast flow. Gulf
moisture remains effectively cut off into next week.
&&
.AVIATION /12Z TAFS THROUGH 12Z FRIDAY/...
Issued at 715 AM EDT Thu Sep 11 2025
VFR conditions will continue with light and variable winds through
tonight.
&&
.MARINE...
Issued at 156 AM EDT Thu Sep 11 2025
Winds and waves will be light into this weekend. Lake breezes in
the afternoon will see west winds AOB 10 knots, otherwise light
offshore flow can be expected.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Ostuno
AVIATION...Ostuno
MARINE...Ostuno

NWS GRR Office Area Forecast Discussion