Port Huron, MI Marine Weather and Tide Forecast

Marine Weather and Tide Forecast for Port Huron, MI

December 11, 2023 2:25 PM EST (19:25 UTC)
Sunrise 7:49AM   Sunset 4:56PM   Moonrise  6:34AM   Moonset 3:37PM 

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Marine Forecasts
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LHZ443 Port Sanilac To Port Huron Mi- 947 Am Est Mon Dec 11 2023
Rest of today..Northwest winds 15 to 20 knots becoming west 10 to 15 knots in the afternoon. Mostly cloudy. Waves 1 to 3 feet.
Tonight..Southwest winds 10 to 15 knots increasing to 15 to 20 knots in the late evening and overnight. Mostly cloudy in the evening then clearing. Waves 1 to 3 feet.
Tuesday..Southwest winds 20 to 25 knots becoming west 15 to 20 knots in the late morning and afternoon. Partly cloudy. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the afternoon. A small craft advisory may be needed.
Tuesday night..West winds 15 to 20 knots. Mostly clear. Waves 1 to 3 feet.
see lake huron open lake forecast for days 3 through 5.

No data

7 Day Forecast for Marine Location Near Port Huron, MI
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Area Discussion for - Detroit/Pontiac, MI
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Area Forecast Discussion National Weather Service Detroit/Pontiac MI 1219 PM EST Mon Dec 11 2023


Overcast skies towing the VFR-MVFR line remain entrenched over southern lower MI this afternoon as west flow continues to draw in low level lake moisture. Winds gradually turn to southwesterly by this evening ushering in milder, slightly drier air which is expected to dissipate/shunt lingering lake cloud out of the area overnight. Low pressure tracking across northern Ontario Tuesday results in strengthening southwesterly flow locally by Tuesday morning with peak gusts in the 20-25kt range. Associated cold front then swings through latter half of the day leading to a shift back to cooler west-northwest flow. While low VFR to perhaps borderline MVFR cloud increases daytime Tuesday in advance of the front, frontal passage itself will be dry.


* High for ceiling aob 5000 feet through this evening, low by late tonight.

Issued at 303 AM EST Mon Dec 11 2023


Deep layer subsidence amid building heights in the wake of a departing mid level wave will expand across Lower Mi this morning and prissiest into tonight. This large scale subsidence will deepen the low level inversion, which will likely hold the stratus deck in place into the evening. This and limited low level thermal advection will keep daytime temps mainly in the 30s today. Low level wind fields will back toward the southwest tonight and will strengthen.
This will drive a warmer low level airmass into Se Mi, eroding the low level inversion and allowing for a clearing trend. Despite the clearing trend, the strength of the gradient flow (1500- 3k ft level winds of 40-45 knots) will limit nocturnal cooling and support nighttime lows mainly in the upper 20s.

The backed flow will be in advance of a cold front moving into the northern lakes tonight. Models have trended a bit stronger with the amplitude of the mid level trough within the base of a polar low originating from central Canada and moving into northern Ontario by Tues morning. This will force the associated surface front all the way into the Ohio Valley by Tues evening. The larger scale dynamics will be focused north of the forecast area. Model cross sections actually indicate the frontal forcing becoming very shallow as it pushes across Se Mi, even falling apart by the time it pushes south of metro Detroit. Model solutions also show a fairly significant mid level dry layer advecting into srn Lower Mi by afternoon. While there will likely be some low clouds with fropa, a dry forecast will continue to be warranted on Tuesday. The low level wind fields along the front will still support fairly breezy conditions. The strongest wind fields are actually expected within the prefrontal airmass as opposed to the post frontal cold air advection region.
With the support of model soundings and probabilistic guidance, peak wind gusts will be kept to 30 MPH, perhaps a little higher in the northern thumb.

The cold front will usher in a seasonally cold airmass for the midweek period. Broad sfc high pressure will expand and strengthen across much of the eastern US during the latter half of the week within a split mid level flow regime across the CONUS. Most notable will be the warm air advection within the return flow of this sfc high which will bring mild air to the forecast area by the end of the week.


There will be a backing of the winds during the course of the day and evening ahead of a cold front approaching from the northwest, forecast to move into far northern Lake Huron Tuesday morning.
Prefrontal southwest winds will become quite strong across Lake Huron tonight and into Tuesday morning. The potential for gales will hinge on the degree of mixing to the lake surface as these winds will drive a warmer low level airmass across the lake. There does look to be a potential for a period when there is enough over lake instability to cause some southwest gale force gusts across Saginaw Bay into central Lake Huron. Current probability guidance is under 50 percent for gusts to gales, however there has been an increase in the probabilities the last few model cycles. Therefore, a gale watch will be issued for Saginaw Bay and central Lake Huron overnight into Tuesday morning. Later forecast shifts will determine if an upgrade to a warning is needed.

THe post frontal wind fields will not be as strong. There does look to be a period Tuesday afternoon into Tuesday night where the gradient increases across the north third of Lake Huron. While there is a potential for a few brief gusts to gale force, guidance is more supportive of 30 knot type wind gusts attm.

Lake Huron...Gale Watch from late tonight through Tuesday afternoon for LHZ363- 421-422-441-462.

Lake St Clair...None.
Michigan waters of Lake Erie...None.

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
FTGM4 - 9014098 - Fort Gratiot, MI 4 mi56 min W 8.9G13 33°F 30.0519°F
PBWM4 5 mi56 min 33°F 30.06
MBRM4 - 9014090 - Mouth of the Black River, MI 6 mi56 min 34°F 30.05
PSCM4 28 mi26 min 8.9G15
AGCM4 30 mi56 min 34°F 46°F30.06
CLSM4 - St. Clair Shores, MI 48 mi26 min W 14G20 34°F 30.13

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Wind History for Fort Gratiot, MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
CYZR SARNIA CHRIS HADFIELD,CN 3 sm25 minW 159 smOvercast34°F19°F55%30.09
KPHN ST CLAIR COUNTY INTL,MI 13 sm9 minW 09G1410 smOvercast34°F19°F55%30.10

Wind History from MTC
(wind in knots)

Tide / Current for
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Weather Map
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GEOS Local Image of GreatLakes   

Detroit, MI,

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