811
FXUS63 KGRR 261746
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
146 PM EDT Tue May 26 2026
.KEY MESSAGES...
- Isolated Showers and Storms Possible Wednesday
- Dry With Highs In The 70s The Rest Of The Week
&&
.DISCUSSION...
Issued at 145 PM EDT Tue May 26 2026
- Isolated Showers and Storms Possible Wednesday
High pressure is keeping conditions dry with highs in the 80s today
(and Wednesday) given 850mb temps in the mid teens. A backdoor cold
front arrives overnight, but the surface front arrives with little
impact other than a direction shift of light winds. The front aloft,
and by extension better forcing, arrive later Wednesday into
Wednesday night with the arrival of a mid-level wave. Low-level
moisture quality is poor so would expect no more than scattered
showers. Given several hundred joules of MLCAPE, isolated
thunderstorms are also possible.
- Dry With Highs In The 70s The Rest Of The Week
Once the backdoor cold front passes through, West Michigan will sit
on the periphery of the upper ridge and an upper low that drifts by
to the east. There are questions as to whether the influence of the
upper-level cold pool affects us and by extension our temperatures.
Regardless, a lack of moisture will lead to ample sunshine late this
week into early next week. The slightly cooler post-frontal airmass,
even with the questions as to how much cooler it will be, will
support highs in the 70s.
&&
.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 137 PM EDT Tue May 26 2026
VFR expected into Wednesday morning with just higher-altitude
clouds. Light S or SW winds this afternoon becoming variable
tonight.
&&
.MARINE...
Issued at 145 PM EDT Tue May 26 2026
We continue to watch for the potential for hazardous winds and waves
later Wednesday into Thursday as an advancing high setup leads to a
period of north winds of 15-25 knots. Short range model guidance
suggests however that the flow may have a slight offshore component
which would keep waves from reaching advisory levels, and gusts will
be marginal if we can reach thresholds according to BUFKIT
overviews. No headlines will be issued at this time. Surface ridging
then sets in for the weekend keeping winds and waves low.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...None.
MARINE...None.
&&
$$
DISCUSSION...Thomas
AVIATION...CAS
MARINE...Thomas
NWS GRR Office Area Forecast Discussion
