503
FXUS63 KGRR 062257
AFDGRR
Area Forecast Discussion
National Weather Service Grand Rapids MI
657 PM EDT Mon Jul 6 2026
.KEY MESSAGES...
- Dry Weather Through Wednesday
- Rain and Thunderstorm Chances Late Wednesday Night into Friday
&&
.DISCUSSION...
Issued at 116 PM EDT Mon Jul 6 2026
- Dry Weather Through Wednesday
Pleasant summer weather is expected to continue through Wednesday as
high pressure sets up over the area. Northeast winds become light
and variable overnight into Tuesday. A lake breeze is expected to
develop Tuesday afternoon which will lower temperatures a few
degrees in the afternoon. Winds then turn to the southwest for
Wednesday and gusts around 20 knots. Highs this week will be in
the 80s with lows in the 50s and 60s.
- Rain and Thunderstorm Chances Late Wednesday Night into Friday
A shortwave trough moves into the region late Wednesday night and
slowly tracks through Thursday bringing chances for rain and
thunderstorms. The low level jet with this system will only be
around 30 knots, there will be some support with the right
entrance region of the upper level jet, but with marginal support
and 1000 J/kg of CAPE the potential for severe storms is low. The
best chance for rain and thunderstorms is early Thursday morning
and during the day Thursday. Lingering positive vorticity
advection may stir up additional showers on Friday.
&&
.AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 657 PM EDT Mon Jul 6 2026
High confidence in VFR conditions over the next 24 hours as a dry
airmass is in place over the area. Clear skies overnight may give
way to a few clouds around 5kft Tuesday with the best chance at
LAN and JXN. Most terminals will see light and variable winds with
sunset becoming north-northeasterly at 5-8 knots Tuesday.
Muskegon has a northwesterly lake breeze with winds diminishing
tonight, before becoming westerly at 5-8 knots Tuesday.
&&
.MARINE...
Issued at 116 PM EDT Mon Jul 6 2026
As high pressure builds into the region, winds are anticipated to
pick up along the lakeshore later this afternoon and into the
evening. North winds gusting 20 to 25 knots will cause waves to
build. Therefore a Small Craft Advisory and Beach Hazard statement
are in effect for areas south of Pentwater. Areas north of Pentwater
have lower confidence in these thresholds being met, but if there is
an uptick in winds and waves they may need to be added until lighter
winds and lower waves return tonight.
Overall winds and waves are expected to remain below 3 feet for most
of the upcoming week with dry conditions expected through Wednesday.
Rain and thunderstorms chances return to the forecast late Wednesday
night into Thursday and linger into Friday.
&&
.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Beach Hazards Statement until 10 PM EDT this evening for MIZ043-
050-056-064-071.
MARINE...Small Craft Advisory until 10 PM EDT this evening for LMZ844>848.
&&
$$
DISCUSSION...RAH
AVIATION...Thomas
MARINE...RAH
NWS GRR Office Area Forecast Discussion
