Spring Arbor, Michigan Weather Forecast Discussion

423
FXUS63 KGRR 120538
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
138 AM EDT Fri Sep 12 2025
.KEY MESSAGES...
- Chance of Rain Saturday
&&
.DISCUSSION...
Issued at 137 AM EDT Fri Sep 12 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 southeast
across Lower Michigan Saturday morning while slowly dissipating
as the LLJ weakens. QPF and POPs are lowered a bit from yesterday.
Instability and shear profiles 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. It may be the
end of next week before the next chance of any rain appears.
&&
.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 137 AM EDT Fri Sep 12 2025
VFR conditions will prevail through Friday night except for some
shallow ground fog overnight at JXN. Winds will be light and
variable overnight then go southwest AOB 10 knots this afternoon.
&&
.MARINE...
Issued at 137 AM EDT Fri Sep 12 2025
Winds and waves will be light into next week. Lake breezes in the
afternoon will see southwest 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