763
FXUS63 KGRR 210756
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
256 AM EST Fri Nov 21 2025

.KEY MESSAGES...

- Mostly Dry through the Weekend

- Pattern change to cold next week

&&

.DISCUSSION...
Issued at 256 AM EST Fri Nov 21 2025

- Mostly Dry through the Weekend

Lower Michigan is in between northern and southern stream low
pressure today. A trailing cold front moves through early today
with low level moisture and areas of drizzle peeling off to the
east this morning. A northern stream shortwave trough axis moves
through Saturday night, but favorable jet dynamics are north of
the forecast area and once again the bulk of the precip misses
southwest Lower Michigan.

- Pattern change to cold next week

Phasing of the northern and southern streams eventually happens
early next week with cyclogenesis across the Northern Plains into
Canada and a trailing front/trough concentrating an area of rain
moving through Lower Michigan on Tuesday. A longwave trough in the
wake of this low will bring a drop in temperatures for the middle
of next week. Cyclonic flow with a potential shortwave trough
axis rotating through could bring lake effect snow showers by the
middle of the week into Thanksgiving.

&&

.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 1130 PM EST Thu Nov 20 2025

Widespread IFR to LIFR is present at all of the terminals in the
form of lower clouds and visibilities to start off the 06z set of
forecasts. This is a slight improvement from earlier as the
drizzle does not look as heavy as earlier. We do expect it to
continue as is for a few hours. Then, conditions will start to
improve from NW to SE across the area as a front moves through and
drier air follows. The IFR will slowly lift by mid to late
morning, then VFR conditions should develop this afternoon and
continue into tonight.

&&

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

&&

$$

DISCUSSION...Ostuno
AVIATION...NJJ