673
FXUS63 KGRR 291104
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
704 AM EDT Fri Aug 29 2025

.KEY MESSAGES...

- Fair and Cool Weekend

- Next chance for Rain is Wednesday

&&

.DISCUSSION...
Issued at 320 AM EDT Fri Aug 29 2025

- Fair and Cool Weekend

Surface high pressure builds over the central Great Lakes over the
weekend with dry and cool weather. Lows tonight will again fall
into the upper 30s across the interior cold hollows with 40s
elsewhere. There will be a slow modification of temperatures
through early next week.

- Next chance for Rain is Wednesday

After a brief period of upper height rises and ridging early next
week, another upper low dives southeast from Canada and carves
out a longwave trough across the central and eastern CONUS by late
in the week. The trough axis and a surface low trailing a cold
front moves through on Wednesday into Thursday with showers and
possibly thunderstorms by Wednesday afternoon. Diurnally driven
showers with some lake enhancement are possible on Thursday into
Friday with the upper low providing steep mid level lapse rates.

&&

.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 704 AM EDT Fri Aug 29 2025

Early morning stratus and shallow ground fog will dissipate and
VFR conditions are expected to prevail into tonight. Winds will be
north less than 10 knots.

&&

.MARINE...
Issued at 320 AM EDT Fri Aug 29 2025

Winds and waves are diminishing and the Small Craft Advisory and
Beach Hazards Statement are cancelled. Waves and winds will
remain relatively light through Labor Day. Water temperatures in
the 50s can be expected as upwelling follows a stretch of north to
northeast winds.

&&

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

&&

$$

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