027
FXUS63 KGRR 061908
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
308 PM EDT Wed May 6 2026
.KEY MESSAGES...
- Frost and Freeze Conditions Thursday Morning
- Cool with Rain Possible Through The Weekend
&&
.DISCUSSION...
Issued at 256 PM EDT Wed May 6 2026
- Frost and Freeze Conditions Thursday Morning
Some of the guidance did trend warmer. However, 850 mb
temperatures will be colder than last night. Couple that with
drier air, calming wind and a moderate inversion and widespread
frost development with freezing temperatures north of 96 remain
likely. As such, a slightly expanded freeze warning has been
issued with a frost advisory for the rest of Lower Michigan.
Please take action to protect any sensitive vegetation.
- Cool with Rain Possible Through The Weekend
A large upper level low currently situated over Hudson Bay will
dominate the weather pattern through the rest of the week and
through the weekend. The upper level low will retrograde as it
rotates. As it does this, it will swing through mid and upper
level short waves through the first half of next week.
This pattern will keep cooler temperatures over the Great Lakes
with periods showers possible in the afternoon and evening
timeframe.
The best chance for showers will be the the front that is still
expected to move through late Saturday into Sunday. Best chances
remain along and south of I 94.
&&
.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 140 PM EDT Wed May 6 2026
There is a 95 percent chance of all terminals remaining above IFR
thresholds and an 85 percent chance of remaining above MVFR
thresholds through 12Z Thursday. No visibility restrictions are
anticipated. A scattered to broken layer around 6000-7000 feet
AGL will diminish in coverage early tonight. Occasional gusts to
around 20 knots at the terminals are expected to end around 00Z
tonight. Although not mentioned in the TAFs for the sake of
brevity, gusty winds are expected to return by late Thursday
morning.
&&
.MARINE...
Issued at 256 PM EDT Wed May 6 2026
Winds will be out of the west and shift to the north overnight
Winds will remain below criteria through the end of the week. Gusts
may approach Small Craft Advisory levels Saturday before the
front moves through Saturday night into Sunday. Northwest winds
and then expected for Sunday and Monday. Waves are expected to be
around 2 feet or less through the forecast period.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Freeze Warning from 1 AM to 8 AM EDT Thursday for MIZ037>040-
044>046.
Frost Advisory from 1 AM to 8 AM EDT Thursday for MIZ043-050>052-
056>059-064>067-071>074.
MARINE...None.
&&
$$
DISCUSSION...Ceru
AVIATION...TJT
MARINE...Ceru
NWS GRR Office Area Forecast Discussion
