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Marine Weather and Tide Forecast for Forestville, MI

July 9, 2025 1:28 AM EDT (05:28 UTC)
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Sunrise 5:51 AM   Sunset 9:07 PM
Moonrise 7:55 PM   Moonset 3:09 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
LHZ463 Expires:202507091000;;118487 Fzus63 Kdtx 090200 Glflh
open lake forecast for lake huron national weather service detroit/pontiac mi 1000 pm edt Tue jul 8 2025
for waters beyond five nautical miles off shore on lake huron
waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum.

Synopsis - Dry and calm conditions as high pressure occupies the central great lakes. Turning warmer and more humid tonight into Wednesday with the arrival of a low pressure system. Expect periods of scattered showers and Thunderstorms until a weak cold front moves through Wednesday evening. Additional storms are possible Friday night into Saturday with gradually warming temperatures.
lhz462>464-091000- lake huron from port austin to harbor beach beyond 5nm off shore- lake huron from harbor beach to port sanilac beyond 5nm off shore- lake huron from port sanilac to port huron beyond 5nm off shore- 1000 pm edt Tue jul 8 2025

Rest of tonight - Light and variable winds. A chance of showers and Thunderstorms after midnight. Waves 2 feet or less.

Wednesday - Southeast winds 5 to 10 knots backing to the east in the late morning and afternoon. A chance of showers and Thunderstorms. Waves 2 feet or less.

Wednesday night - Northeast winds 5 to 10 knots backing to the north in the late evening and overnight. Waves 2 feet or less.

Thursday - North winds 5 to 10 knots. Waves 2 feet or less.

Thursday night - North winds 5 to 10 knots early in the evening becoming light and variable. Waves 2 feet or less.

Friday - Light and variable winds becoming southeast 5 to 10 knots. Waves 2 feet or less.

Saturday - South winds 5 to 10 knots increasing to 10 to 15 knots in the late morning and early afternoon - .then becoming southwest 5 to 10 knots until early morning. A chance of Thunderstorms until early evening. A chance of showers. Waves 1 to 3 feet.

Sunday - Southwest winds 5 to 10 knots backing to the south in the late evening and early morning. A chance of showers early in the morning. Waves 2 feet or less.
LHZ400
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7 Day Forecast for Marine Location Near Forestville, MI
   
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Area Discussion for Detroit/Pontiac, MI
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FXUS63 KDTX 090436 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1236 AM EDT Wed Jul 9 2025

KEY MESSAGES

- Increasing chances for some showers and thunderstorms through this morning.

- Shower and thunderstorm potential and coverage increases this afternoon and evening. The strongest storms will be capable of producing wind gust around 45-55 mph. Highly localized flooding remains possible.

- Dry and warmer conditions return Thursday and Friday.

AVIATION

A warm front lifts across the area sparking scattered showers and possible thunderstorms. Scattered showers and possible thunderstorms will last through the morning until around 11-12Z and focused from FNT south to the southern metro terminals. Will still see predominately VFR skies through tonight, but occasional MVFR conditions will be possible with any activity that passes over terminals. It's possible showers linger after 11-12Z, but the greater chances for more showers and thunderstorms is expected early this afternoon associated with the cold front. Have maintained PROB30 groups for this potential. VFR conditions follow thunderstorm chances this evening into tonight.

For DTW/D21 Convection... There will be a low chance for thunderstorms with shower activity through the morning hours.
Greater thunderstorm threat comes by around 16Z and through the afternoon. Isolated severe weather will be possible.

THRESHOLD PROBABILITIES...

* Low for thunderstorms through this morning and again this afternoon.

PREV DISCUSSION
Issued at 338 PM EDT Tue Jul 8 2025

DISCUSSION...

Tranquil conditions persist through the afternoon and evening with seasonal temperatures. Elevated instability increases overnight as a plume of theta-e rich air spreads into the region, with MUCAPE values gradually increasing. While low-level WAA remains limited, low-amplitude mid-level troughing pivots over the Great Lakes and coupled with subtle convergence within the theta-e plume, will bring increasing chances for elevated showers and thunderstorms late tonight through tomorrow morning. By tomorrow afternoon and evening, showers and thunderstorms will turn surface based as instability rises aoa 1000 j/kg, fueled by diurnal heating. Some better forcing will be found along a cold front that will pivot through the Tri- Cities, Thumb and Flint region through the afternoon and early evening hours. Additional weak convergence along lake boundary and intrusion of southwest flow near the border will also be potential areas for shower and thunderstorm development through the day.
Scattered to numerous showers with embedded storm development is expected given the above.

Shear values are modest with 1-6km values of 20 knots, bringing the potential for organized convection of isolated to multicellular variety. The main threats will be stronger gust potential of 45-55 mph and small hail. Slow storm motions will bring the chance for highly localized flooding potential. Please see the hydrology section for additional details. The moisture-rich low-levels will likely be an inhibiting factor for any stronger mentions of gusts reaching severe criteria. Instability wanes while the front clears late tomorrow night, ending all precipitation chances.

Upper-level confluence will reinforce high pressure across the state Thursday with its influence extending into Friday as high pressure washes out across New England and the western Atlantic. This will bring dry conditions through the end of the week with seasonal temperatures. The next chance for showers and thunderstorms will enter in the Saturday-Sunday timeframe. An upper-level disturbance will come onshore across northern California into the Four Corners before shearing out across the Midwest and Great Lakes. An upper- level trough will trail the wave over the northern Plains, with this prefrontal trough/cold front combination bringing the chance for showers and thunderstorms. There still remains questions on phasing of the aforementioned features, but the boost in warm air advection ahead of any troughing feature does bring the chance for some slightly above normal temperatures by Saturday, potentially challenging the 90s through the Metro region.

MARINE...

Light and variable winds remain in place this afternoon and evening as diffuse surface pressure field lingers over the central Great Lakes a bit longer. A weak surface low/trough drifts across northern Lower Michigan tonight and out over Lake Huron Wednesday while gentle winds organize out of the SE. This draws more humid and increasingly unstable air into the region while the governing upper low tracks across eastern Ontario into western Quebec. The combination of forcing and instability ensure periodic thunderstorms Wednesday afternoon and evening, with later rounds tied to the passage of the system's cold front. Ambient dynamics are rather weak which should keep prevailing conditions below Small Craft Advisory criteria, but locally higher winds/waves are possible with some stronger storms that might develop. Shortwave ridging slides east Thursday allowing surface high pressure to build in from the Upper Midwest which facilitates mainly dry conditions across the waterways. A more robust low moves in late Friday into Saturday with renewed potential for showers and storms.

HYDROLOGY...

Scattered to numerous showers and thunderstorms are forecast tomorrow. Storms will be relatively disorganized, but with humid conditions and slow storm movement, storms will be capable of producing torrential downpours. Localized areas may receive over 1 inch per hour, with extremely localized rainfall totals ranging from 1-3+ inches, pending any thunderstorms training or repeated thunderstorm activity. Highly localized flooding of urban areas, small streams, and otherwise poorly drained areas will be possible.
The main threat for flooding will be between 1pm and 9pm.

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


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
45149 - Southern Lake Huron 22 mi89 minESE 5.8 70°F 70°F0 ft30.03
HRBM4 - 9075014 - Harbor Beach, MI 48 mi59 minS 5.1G5.1 68°F 67°F30.0164°F


Wind History for Harbor Beach, MI
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KP0 sm33 minSSE 04--68°F61°F78%30.03

Weather Map
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GEOS Local Image of great lakes  
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Detroit, MI,





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