050
FXUS63 KGRR 260515
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
115 AM EDT Wed Aug 26 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 /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 115 AM EDT Wed Aug 26 2026
A line of showers is likely to arrive at MKG around 12z this
morning, with embedded thunder possible. Some of this line may
survive as it presses east toward GRR and AZO after 14z. HREF
guidance suggests the 18z-21z period is where TSRA is most likely
to develop between AZO and LAN especially, then move east into
late evening. An isolated shower or storm may also redevelop
across central Lower MI and head SE after 23z, though it is
difficult to pinpoint where that activity may be. Any TSRA
activity could produce wind gusts in the 30-40 kt range. Once
radar trends better emerge, amendments may be needed to include
some of these higher gusts.
&&
.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 through this evening for MIZ037-043-050-
056-064-071.
MARINE...Small Craft Advisory until midnight EDT tonight for LMZ844>849.
&&
$$
DISCUSSION...Maczko
AVIATION...Hoving
MARINE...Maczko
NWS GRR Office Area Forecast Discussion