Augusta, Michigan Weather Forecast Discussion

872
FXUS63 KGRR 271723
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
123 PM EDT Sat Sep 27 2025
.KEY MESSAGES...
- Fog through the north again this morning
- Warm and Dry conditions ahead
&&
.DISCUSSION...
Issued at 330 AM EDT Sat Sep 27 2025
- Fog again this morning
Clearing skies along and adjacent to the US 10 corridor have
allowed patchy fog and shallow low clouds to form over much of
northern lower Michigan. Model soundings at Mt Pleasant show dry
air aloft, along with stronger winds, and an inversion with light
winds at the surface. Couple this with low level moisture and you
have a good recipe for fog.
 However, while winds remain fairly calm through out the lower
peninsula, there remains slightly drier air south of the above
mentioned demarcation. While shallow fog is still possible, it
will be limited to only the low lying regions Any fog will
continue until shortly after sunrise before lifting and
dissipating.
- Warm and Dry conditions ahead
Models remain consistent on the forecast ahead. A shallow weak
front will move through southern Canada sweeping a dry boundary
through the region tonight.
 Warm dry air will follow as high pressure moves over the central
United States and will dominate the pattern through the upcoming
week. Expect Max Temps to be 10 to 15 degrees above normal with
readings in the 80s through the first half of the week.
 The ridge will shift eastward mid week with a perturbation riding
over the top of the ridge which could bring a temps slightly
closer to normal. Precipitation not expected this week.
&&
.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
Issued at 120 PM EDT Sat Sep 27 2025
VFR conditions are likely over the next 24 hours with one main
caveat. There is a low (10-20 percent) chance of MVFR and lower
conditions at MKG due to fog given elevated crossover
temperatures. There are mitigating factors however including a
more turbulent boundary layer due to an approaching cold front.
This cold front will cross the area overnight causing our
predominantly west southwest flow to become northwesterly into
the day on Sunday. Skies will be clear to mostly clear through the
TAF period.
&&
.MARINE...
Issued at 330 AM EDT Sat Sep 27 2025
Conditions are expected to remain below Small Craft Advisory/Beach
Hazards Statement levels the next several days as a weak gradient is
in place across the area. North winds today will flip to
southwesterly Saturday. Winds will peak each afternoon at around 10-
15 knots as some lake breeze enhancement occurs along the shoreline.
There is also a signal for a wind enhancement early Sunday morning
of around 10-15 knots near Big and Little Sable points as a wind
maxima moves south across the lake. Expect dry conditions across the
waters.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Ceru
AVIATION...Thomas
MARINE...Thomas

NWS GRR Office Area Forecast Discussion