378
FXUS63 KGRR 252352
AFDGRR

Area Forecast Discussion
National Weather Service Grand Rapids MI
752 PM EDT Tue Aug 25 2026

.KEY MESSAGES...

- Chance for thunderstorms Wednesday, maybe some severe weather

&&

.DISCUSSION...
Issued at 255 PM EDT Tue Aug 25 2026

- Chance for thunderstorms Wednesday, maybe some severe weather

Cold front on track for Wednesday with some light showers still
possible early in the morning. Main time frame for any severe
weather still looks to be noonish and after with all weather
clearing the area by 8pm. Morning showers should be pretty
scattered and are likely to inhibit afternoon storm potential for
a good deal of the area - especially north of I-96 and west of
US-131. Some warm/moist air will build in ahead of the front into
southern lower Michigan...where best potential for destabilization
will occur mid-afternoon into the early evening. This leaves the
best potential for severe weather near I-94 and east of
US-131...probably closer to US-127 and east.

&&

.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 750 PM EDT Tue Aug 25 2026

VFR conditions tonight will give way to thickening clouds by early
Wednesday and eventually a risk for showers and thunderstorms.
S-SW breezes on Wednesday, coupled with warm air and moisture
advection, and an approaching cold front will result in a risk
for storms beginning at MKG around 12Z, GRR/AZO/BTL 14-15Z, and
LAN/JXN 16-17Z.

SW winds outside of thunderstorms on Wednesday will gust to 20-25
kt, and likely exceed 30-40 kt in the stronger storms. Occasional
MVFR vsbys /3-5SM/ are expected within the thunderstorms. The
strongest storms are expected after roughly 18Z south and east
of a line from AZO to LAN.

&&

.MARINE...
Issued at 255 PM EDT Tue Aug 25 2026

Winds and waves to increase overnight tonight making for a hazardous
boating and swimming day Wednesday. 3 to 7 foot waves will be
common...especially in the northern zones into late Wednesday
evening. Waves are likely to be a little less toward St joseph but
borderline enough in the northern part of Van Buren County to not
leave that zone out of the headlines at this time.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Beach Hazards Statement from 2 AM EDT Wednesday through
     Wednesday evening for MIZ037-043-050-056-064-071.
MARINE...Small Craft Advisory from 2 AM Wednesday to midnight EDT
     Wednesday night for LMZ844>849.

&&

$$

DISCUSSION...Maczko
AVIATION...Smith
MARINE...Maczko

NWS GRR Office Area Forecast Discussion