981
FXUS63 KGRR 010527
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
127 AM EDT Wed Oct 1 2025

.KEY MESSAGES...

- Dry through the Weekend

- Chance of Rain Early Next Week

&&

.DISCUSSION...
Issued at 305 PM EDT Tue Sep 30 2025

- Dry through the Weekend

Upper ridging slowly flattens over the next few days. Dry easterly
flow continues into mid-week then goes south with modest moisture
return by early next week. No rain expected through this week and
the weekend as ridging persists ahead of slowly advancing western
CONUS troughing.

- Chance of Rain Early Next Week

As the upper trough advances, a cold front will provide enough low
level convergence for some showers to move in late Monday, but
instability is limited and thunder chances appear to be low enough
to leave out of the forecast at this point. The front should move
through by Tuesday with surface high pressure building in and a
return to fair weather and near normal temperatures.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 127 AM EDT Wed Oct 1 2025

Our main focus for aviation interests remains the potential for
mainly low cloud cover/stratus developing this morning. Latest
observations and Night time Microphysics Satellite imagery does
not show any stratus, yet. Quite a bit of guidance indicates that
this potential is still very possible, just maybe delayed a bit.
Given this thinking, we will continue with the stratus developing
this morning, and mixing out quickly by 14z.

Otherwise, just high clouds will affect the terminals through 06z
tonight. Winds from the ENE will continue, with only a slight
decrease in speeds after sunset tonight.

&&

.MARINE...
Issued at 305 PM EDT Tue Sep 30 2025

East winds to 20 knots will mean waves will be limited to one to
two feet the next day or so, with the higher waves well offshore.
The winds go south on Thursday and Friday and increase, and a
Small Craft Advisory may be needed by the Friday or Saturday.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.

&&

$$

DISCUSSION...Ostuno
AVIATION...NJJ
MARINE...Ostuno