Marine Weather and Tide Forecast for Manchester, MI

AVIATION

Deep lapse rates near moist adiabatic resulted in potential instability and a cluster of elevated showers over Metro Detroit the past hour. Low confidence exists in cloud trends early this evening with enough daylight hours left to cause a small amount of insolation. Recent rain will likely lead to additional low level saturation and broken stratocumulus. Will maintain a more pessimistic MVFR ceiling into the evening. Low confidence exists then late tonight regarding any fog potential. Center of surface high pressure does build into far southern Lower Michigan late which could result in a favorable conditions for a surface inversion. However, could very well end up with more of a low IFR stratus deck and the guidance is mixed particularly for the Detroit taf sites. Will maintain the inherited IFR visibility restrictions and monitor trends. Daytime mixing Monday should allow clouds to mix out and prefer low sky fraction.

D21/DTW Convection...No thunderstorms anticipated.

DTW THRESHOLD PROBABILITIES

* High for ceilings at or below 5000 feet tonight. Low Monday.

* Low for visibilities of 1/2sm or ceilings at less than 300 ft.

PREV DISCUSSION
Issued at 200 PM EDT Sun May 24 2026

DISCUSSION...

As mid-level troughing continues to sweep through the region today, the ongoing cluster/line of showers and embedded storms will continue to move east across the area. Low level moisture looks to hang around into the overnight hours, but we should start to see these pesky, lingering low clouds scatter out tomorrow morning.

Another weak trough is progged to move east across the Upper Great Lakes Monday through Tuesday. Ahead of and south of this next shortwave, we will see strengthening warm air advection and a significant warm up compared to the weekend. Models are fairly consistent with 925mb temperatures around 18C advecting into the area on Monday, and then further increasing to 20-22C by Tuesday.
With good mixing processes at play each day, this warm air advection will help support temperatures warming into the upper 70s and lower 80s for Memorial Day and then mid to upper 80s for Tuesday. The warmest conditions over the next two days are expected up across the Tri-Cities and portions of the Thumb. There is a very low chance (<15%) that showers or storms develop during the afternoon hours on Memorial Day up across the Tri-Cities and Thumb region. Moisture transport and forcing are more impressive further north.

By Tuesday, a weak cold front extending off of low pressure well northeast of the region slowly drops south across northern Michigan.
Mid-level flow is fairly unidirectional along the frontal boundary, so don't expect it to move north/south much during the day. Thus, have maintained a dry forecast. By Wednesday, this front will get start to feel the influence of another shortwave digging south across Ontario into Quebec, and will finally drop south across the area.
This will bring the next best chance for showers and thunderstorms to the area. Ahead of the front, temperature on Wednesday likely climb into the 80s for much of the area, but some areas may not warm as much depending on the timing of the backdoor cold front.

High pressure builds in behind the cold front ushering in drier and more seasonable conditions through the end of the week and into next weekend. Daytime highs in the 70s and overnight lows dropping down into the 40s/50s are expected.

MARINE...

Light winds continue to prevail across the region. High pressure builds into the area tonight and remains in place through Tuesday, favoring the development of southwest flow across the central Great Lakes. Southwest winds may increase across the Saginaw Bay area on Tuesday, with southwest winds increasing to around 20 knots. By Wednesday, high pressure becomes quite elongated, stretching across the Ohio Valley and into the Northeast. A cold front then drops south across the area late Wednesday, with the next chance for showers and thunderstorms. The mid-week cold front is not expected to be particularly strong, so currently not anticipating any significant ramp up of winds behind the front. Another area of high pressure builds into the region behind the front and will lead to varying winds throughout the end of the week. There may be periods with enhanced onshore northeast winds, which may elevate wave activity in nearshore zones at times.

DTX WATCHES/WARNINGS/ADVISORIES
MI...None.
Lake Huron...None.
Lake St Clair...None.
Michigan waters of Lake Erie...None.