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Marine Weather and Tide Forecast for Port Sanilac, MI

June 25, 2024 2:46 AM EDT (06:46 UTC) Change Location
Sunrise 5:50 AM   Sunset 9:14 PM
Moonrise 11:19 PM   Moonset 8:32 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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LHZ463 Expires:202406250400;;595417 Fzus63 Kdtx 241951 Glflh
open lake forecast for lake huron national weather service detroit/pontiac mi 351 pm edt Mon jun 24 2024
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 - High pressure around 30.00 inches holds across the region today and tonight. The next low pressure system will develop upstream today and will pass over the region Tuesday and Tuesday night bringing the next chance of Thunderstorms.
lhz462>464-250400- 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- 351 pm edt Mon jun 24 2024

Tonight - Light and variable winds becoming south 5 to 10 knots in the late evening and early morning - .then increasing to 10 to 15 knots early in the morning. Waves 2 feet or less.

Tuesday - South winds 10 to 15 knots increasing to 15 to 20 knots in the late morning and early afternoon - .then decreasing to 10 to 15 knots late in the afternoon. Showers in the morning - .then a chance of showers in the afternoon. Waves 2 to 4 feet building to 3 to 5 feet in the late morning and afternoon.

Tuesday night - Southwest winds 10 to 15 knots becoming west 5 to 10 knots in the late evening and overnight. Waves 2 to 4 feet subsiding to 1 to 3 feet in the late evening and overnight.

Wednesday - West winds 5 to 10 knots becoming north 10 to 15 knots in the late morning and afternoon. Waves 1 to 3 feet.

Wednesday night - North winds 10 to 15 knots. Waves 2 to 4 feet.

Thursday - North winds 5 to 10 knots veering to the northeast late in the evening. Waves 1 to 3 feet.

Friday - Southeast winds 5 to 10 knots increasing to 10 to 15 knots. Showers likely and a chance of Thunderstorms in the late evening and early morning. Waves 1 to 3 feet building to 2 to 4 feet in the late evening and early morning.

Saturday - South winds 10 to 15 knots veering to the west in the late evening and early morning. Showers likely early in the morning. A chance of Thunderstorms. A chance of showers until early evening. Waves 2 to 4 feet.

No data

7 Day Forecast for Marine Location Near Port Sanilac, MI
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Area Discussion for - Detroit/Pontiac, MI
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651 FXUS63 KDTX 250348 AFDDTX

Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1148 PM EDT Mon Jun 24 2024


- A complex of showers and thunderstorms arrive early Tuesday morning bringing a low potential for an isolated strong to possibly severe wind gust. Locally heavy rainfall is also possible.

- An additional round of thunderstorms is possible Tuesday night into early Wednesday, mainly along and south of the I-94 corridor across Washtenaw and Wayne County.

- Cooler and less humid air moves back into the area late Wednesday and lasts through Thursday.


Mid/upper clouds will expand east into the area overnight in advance of developing/encroaching convective system. This system will bring a chance of thunderstorms by 10z-12z from northwest to southeast with shra/tsra activity possibility persisting for 3 to 5 hours into Tuesday morning before dissipating/moving southeast of the region.
The main impacts will be lowered visibility in heavy downpours and an isolated strong wind gust. Warmer air arrives on a breezy southwest wind Tuesday afternoon with a slight chance for additional convection to develop as the cold front moves through late. Will leave out of the forecast at this time given low chance and low confidence.

For DTW/D21 Convection...Tuesday morning TSRA window remains the same in this forecast (13z-16z). These storms could bring locally heavy downpours and possibly isolated wind gusts. Will main a dry forecast beyond 16z at this time, but will re-evaluate as isolated shra/tsra could develop along encroaching cold front late in the day Tuesday.


* Medium for ceilings aob 5kft Tuesday after after 12z.

* Medium in thunderstorms Tuesday morning mainly 13-16z. Low confidence late Tuesday afternoon.

Issued at 404 PM EDT Mon Jun 24 2024


Nearly full insolation this afternoon with a high pressure and shortwave ridge moving through has allowed temperatures this afternoon to climb mostly into the upper 70s and low 80s. The lower humidity with dewpoints mostly in the lower to mid 60s should make for a relatively pleasant evening free of any precipitation.
Temperatures tonight expected to fall into the 60s.

Attention turns toward the Upper Midwest tonight and the expectation for upscale growth across Wisconsin. This system will be triggered by a northern plains shortwave and move along a warm front.
Initiation will be near the triple point with a strong low level jet of 50+ knots driving this MCS east/southeast. There still remains some differences in the CAMs as to where the strongest portion of this line sets up and moves into portions of western Michigan.
Greater consensus would be towards Chicago closer to the thermal gradient. In any case, any northward extension of this system will encounter a stable surface layer as it arrives into southeast Michigan. There will be elevated instability to work with being directed into the area via the strong low level jet, which will support numerous to widespread coverage of thunderstorms spreading across the area. Timing has activity reaching western portions of the CWA between 09-11Z while continuing to weaken and push east before 16Z with potentially trailing isolated to scattered showers for the early portion of the afternoon. An outlook of general thunderstorms is in place prior to 12Z tomorrow.

A Marginal Risk is in place for all of southeast Michigan post 12Z, which would cover the bulk of these morning thunderstorms. While expectation is for this MCS to be weakening, there remains at least a low probability for an isolated strong to possibly severe wind gust as this system rolls through. The greater surface moisture with the warm sector arrives Tuesday afternoon in the wake of the early morning system with dewpoints returning to the 70s. This will yield strong afternoon instability, but indications are that there will be a strong cap in place for the afternoon greatly limiting any the potential for thunderstorms. Have cut back on PoPs from previous cycle for tomorrow afternoon given this trend, but will continue to monitor how things evolve post morning convection. The best instability with the frontal boundary then sets up along the southern Michigan border along with any potential outflow boundary late in the day. This will be the focus for potential evening and overnight convection as lower level jet ramps up again. Strongest activity looks to hold south of the state, with uncertainty as to how far north any activity develops. Low end PoPs will extend up through I-69 corridor, but greatest chance for thunderstorms will reside along and south of I-94. This activity could again pose a Marginal Risk for severe weather if it materializes.

The next trough and cold front dropping out of the western/northern Great Lakes arrives Wednesday morning and sweeps through during the afternoon. This will keep chances for showers and weak thunderstorms into Wednesday afternoon until the front pushes completely through.
High pressure is then expected to quickly build in Wednesday evening through Thursday bringing with it dry and slightly temperatures into the 70s for Thursday. Another shortwave and surface low is forecast to organize over the plains and continue through the Midwest bring the next chance of showers and thunderstorms on Friday.


High pressure holds directly overhead through this evening maintaining light winds and minimal waves across the region. This high eventually drifts off to the east overnight as low pressure strengthens over the upper Midwest/northern Ontario. This low is expected to result in a thunderstorm complex (a MCS) forming over Wisconsin before rapidly moving into the Great Lakes late tonight into Tuesday morning. Exact track this complex takes still carries a bit of uncertainty though models are generally favoring it to dive towards southern Lake Michigan resulting in a glancing shot of showers and decaying thunderstorms for the central Great Lakes. A few strong wind gusts will be possible within these storms.

Breezy southwest winds develop daytime Tuesday in advance of an approaching cold front warranting the need for Small Craft Advisories for all nearshore waters. Front gradually sags through the area offering some potential (~20-30%) for additional showers and storms Tuesday evening into early Wednesday morning- mainly focused over the southern Great Lakes.


An active pattern of thunderstorms returns to Lower Michigan by early Tuesday morning as warm and humid air surges back into the region. Most of southeast Michigan will see at least a period of showers during the morning as thunderstorms decrease intensity while moving through. Rainfall totals average 0.25 to 0.50 inch.

The Tuesday morning activity is followed by a break in the afternoon until the next round of storms becomes possible Tuesday night into Wednesday morning. Current forecast trends suggest the best thunderstorm potential along and south of I-94. Additional totals of 0.25 to 0.50 inch with up to 1 inch are possible with this activity until it exits the area by Wednesday afternoon.

The potential for flooding in each event is greater where repeated rounds of storms occur over the same area making ponding of water on roads and in prone low lying areas possible. The Tuesday and Wednesday activity collectively could lead to a brief response in the level of streams and rivers across the area.

Lake Huron...Small Craft Advisory from 5 AM to 10 PM EDT Tuesday for LHZ421-422- 441>443.

Lake St Clair...Small Craft Advisory from 8 AM to 4 PM EDT Tuesday for LCZ460.

Michigan waters of Lake Erie...Small Craft Advisory from 8 AM to 4 PM EDT Tuesday for LEZ444.

Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
45209 31 mi26 minWSW 7.8G9.7 68°F 66°F1 ft29.9263°F
HRBM4 - 9075014 - Harbor Beach, MI 33 mi46 minSSW 6G8 67°F 62°F29.8659°F
FTGM4 - 9014098 - Fort Gratiot, MI 39 mi46 minSW 5.1G8 69°F 29.8858°F
PBWM4 40 mi46 min 69°F 29.90
MBRM4 - 9014090 - Mouth of the Black River, MI 41 mi46 min 70°F 29.88
KP58 47 mi51 minS 2.9 68°F 29.8558°F

Wind History for Harbor Beach, MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KBAX47 sm11 minS 0710 smClear68°F57°F68%29.86
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Wind History graph: BAX
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Detroit, MI,

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