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