954
FXUS63 KGRR 211655
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
1155 AM EST Sun Dec 21 2025
.KEY MESSAGES...
- Strong Winds subside this morning
- Showers with light accumulations Monday
- Warm Weather Ahead
&&
.DISCUSSION...
Issued at 330 AM EST Sun Dec 21 2025
- Strong Winds subside this morning
The northwesterly flow will continue this morning. However the
gradient continues to slacken as the LLJ moves eastward. Will
allow Gale and wind advisory to expire at 4 AM. High pressure will
build over the region today with mild warm air advection. Highs
will remain in the 20s.
- Showers with light accumulations Monday
A warm frontal boundary tomorrow with a negatively tilted mid
level trough will allow for enough moisture and convection for
snow showers, primarily north of the I 96 corridor. Moisture is
limited so accumulations will be limited to an inch or less. The
highest accumulations are possible along the US 10 corridor. As
the warm front continues to lift to the north the showers will
transition to a wintry mix then to a chance of rain Monday night.
- Warm Weather Ahead
Temperatures continue to trend warmer through the week. A large
Quasi stationary high located over the Gulf will dominate the
pattern this week. There remains some zonal flow late in the week,
however confidence is low on timing and QPF amounts. Rain remains
possible Christmas Day. Temperatures through the week continue to
trend above normal. However, they are trending slightly lower in
recent runs. Temps on Christmas are ranging from around 40 along
US 10 to the low 50s along the I 94 corridor. That equates to 5 to
15 degrees above normal respectively .
&&
.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 1155 AM EST Sun Dec 21 2025
Lingering MVFR cigs at GRR and MKG will lift to VFR over the next
few hours before scattering out tonight. A warm front crossing the
area Monday morning will lead to ceilings lowering to 7-10kft
areawide. A low (30%) chance of snow showers exists at
MKG/GRR/LAN Monday morning, with low-level dry air being the main
limiting factor. Have gone with a PROB30 for now as a result.
Northwest winds today around 5-10 knots shift to southerly with
the passage of the warm front.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Ceru
AVIATION...Thomas
NWS GRR Office Area Forecast Discussion