Spring Arbor, Michigan Weather Forecast Discussion

019
FXUS63 KGRR 071828
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
228 PM EDT Sun Sep 7 2025
.KEY MESSAGES...
- Frost possible tonight across the interior north
- Dry and warmer this week
&&
.DISCUSSION...
Issued at 228 PM EDT Sun Sep 7 2025
- Frost possible tonight across the interior north
The center of high pressure is over Michigan today and we`ll see
the diurnal cu dissipate with sunset. Wind will also diminish
resulting in good radiational cooling conditions. Temperatures
across the far northeast two counties will settle in the mid 30s
tonight. When combined with dewpoints fairly close to that, we`re
likely to see some frost develop; we`ve issued a Frost Advisory
for Osceola and Clare counties from 2am to 9 am.
- Dry and warmer this week
The high will drift east early this week and south winds will
develop. That`ll push warmer air northward into the Great Lakes.
There really aren`t many chances for rain during the upcoming
week. There`s an upper trough that swings through Wednesday, but
the air ahead of it is really dry and we don`t anticipate any
precipitation then.
Friday night across the northwest cwa may be the best chance as it
will be close to the nose of the warm front to the west. But can`t
see much more than a 20 percent chance at best.
The ECMWF ensembles are very dry with temperatures warming to
around 80 by Wednesday and climbing to the lower 80s by the
weekend.
&&
.AVIATION /18Z TAFS THROUGH 18Z MONDAY/...
Issued at 141 PM EDT Sun Sep 7 2025
Scattered clouds with bases between 4,000 and 6,000 feet (some of
which are now producing pockets of light rain) will diminish
toward clear skies with the sunset this evening. There is another
chance of IFR visibility from patchy/shallow fog at JXN tonight
after 08Z to sunrise. Can`t rule out AZO and BTL getting a little
fog also.
&&
.MARINE...
Issued at 141 PM EDT Sun Sep 7 2025
Moderate beach hazards ongoing but winds and waves are trending
down this evening. Southwest winds on Monday will build up 2-4 ft
waves especially north of Grand Haven to Ludington by the
afternoon and evening. These winds persisting Monday night into
Tuesday may continue to build waves toward 3-5 feet, possibly
necessitating a small craft advisory and beach hazards statement.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Frost Advisory from 2 AM to 9 AM EDT Monday for MIZ039-040.
MARINE...None.
&&
$$
DISCUSSION...04
AVIATION...CAS
MARINE...CAS

NWS GRR Office Area Forecast Discussion