South Haven, MI Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for South Haven, MI

April 15, 2024 9:51 PM EDT (01:51 UTC) Change Location
Sunrise 7:00 AM   Sunset 8:28 PM
Moonrise 11:12 AM   Moonset 2:31 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.

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Marine Forecasts
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LMZ844 St Joseph To South Haven Mi- 405 Pm Edt Mon Apr 15 2024

Through early evening - North winds 10 to 15 knots. Sunny. Waves 1 foot or less.

Tonight - Northeast winds 10 to 15 knots veering east toward daybreak. Mostly clear. Waves around 1 foot.

Tuesday - East winds 15 to 25 knots. Mostly Sunny with a chance of rain showers. Waves 1 to 3 feet.

Tuesday night - Southeast winds to 30 knots. Rain showers and a chance of Thunderstorms. Waves 2 to 4 feet subsiding to 1 to 3 feet toward daybreak.

Wednesday - Southeast winds around 20 knots veering southwest. Rain showers and a chance of Thunderstorms. Waves 2 to 4 feet.

Wednesday night - West winds 15 to 25 knots. Partly cloudy. Waves 2 to 4 feet.

Thursday - Northwest winds 10 to 15 knots. Partly Sunny. Waves 2 to 4 feet.

Friday - Northwest winds 15 to 20 knots. Mostly Sunny. Waves 1 to 3 feet.

Saturday - Northwest winds 15 to 20 knots. Mostly Sunny. Waves 2 to 4 feet.

LMZ800
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7 Day Forecast for Marine Location Near South Haven, MI
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Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 160018 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 818 PM EDT Mon Apr 15 2024

KEY MESSAGES

- Showers and Storms Tuesday Night into Wednesday Night

- Light Rain Chances Thursday Night

- Cool Down for the End of the Week

DISCUSSION
Issued at 339 PM EDT Mon Apr 15 2024

- Showers and Storms Tuesday Night into Wednesday Night

Quiet weather will persist tonight and most of if not all of Tuesday as high pressure drifts through the region. A warm front approaches from the southwest late in the day on Tuesday and moves squarely into the forecast area Tuesday night. The surface low associated with the front will swing across the forecast area on Wednesday with a warm sector likely pushing into southern portions of the forecast area in the midday to afternoon hours. The active weather is very much centered in the Tuesday night and Wednesday forecast periods.

Tuesday looks to be dry with showers and likely embedded thunderstorms moving in Tuesday evening. Forecast most unstable CAPE values are not significant Tuesday night in the 400-800 j/kg range. Expecting periods of rain with some rumbles of thunder embedded. Not expecting severe weather and the SPC agrees with a general thunder forecast.

Wednesday could be a bit more interesting, but there are caveats with that statement. We are expecting a good amount of clouds and rounds of precipitation Tuesday night lasting into Wednesday morning. The clouds and rain will keep instability levels down a bit, but the 3km NAM is showing 1,000-2,000 j/kg of most unstable CAPE developing. a 30+ knot low level jet combined with a 40+ knot mid level jet produce deep layer shear around 40 knots towards I-94. Expecting more rounds of showers and storms on Wednesday, but with the chance of a few stronger storms. The way Wednesday could over perform (severe weather) is if the precipitation is a bit less coming into Wednesday and we get areas of clearing in spots. Deep layer shear of 40 knots combined with 1,000+ j/kg of MUCAPE could certainly produce some severe weather.
Multiple fronts in the area and the potential for rotating storms has our attention if the above caveats of less precipitation and clouds come to fruition. The issue with severe chances on Wednesday is less precipitation and clouds is not a good bet at this time. Agree with the SPC marginal and we will see how things evolve. With tonight's model runs the event will be fully in the HRRR window which is obviously the gold standard in terms of convective model forecasts. Showers move off to the east Wednesday night as the low pulls away.

Rainfall totals look to be around an inch from this system which should push a few sites to near or slightly above bankfull. That said, we are not expecting much in the way of flooding issues.

- Light Rain Chances Thursday Night

A cold front will move through the area Thursday night to Friday morning bringing renewed chances for light rain. Conditons should turn dry after daybreak Friday as the front moves east. HIgh pressure slides in behind that front resulting in dry conditions through the weekend. Skies will begin to clear out Friday morning with good chances for sunshine Friday afternoon through Monday.

- Cool Down for the End of the Week

The surface low that tracks through the area Tuesday and Wednesday moves northwards into the Hudson Bay area on Thursday. 850mb thermal trough settles in over the region on the backside of the low with prolonged cold air advection through the weekend. 850mb temps bottom out around -3C to -6C Saturday, resulting in peak afternoon surface temps in the 40s to 50s. High pressure brings clearing skies this weekend with radiational cooling dropping overnight temps to freezing Saturday night and Sunday night.

AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/
Issued at 820 PM EDT Mon Apr 15 2024

VFR ceilings and visibilities will continue through the forecast period with dry conditions. Winds will shift easterly between 00z to 06z, and will increase after 12z Tuesday. Easterly winds of 10 to 15 knots are expected late Tuesday morning, early Tuesday afternoon winds will increase with gusts up to 20 to 25 knots.
Wind will continue through Tuesday evening as a system producing rain showers and storms moves through the area.



MARINE
Issued at 339 PM EDT Mon Apr 15 2024

A light wind regime will continue for the area tonight. High pressure will remain in control one more forecast period before things become more active. The ridge of high pressure moves off to the east on Tuesday allowing for a strengthening easterly flow to develop. 15 to 20 knot winds in the morning will be sub advisory, but in the afternoon wind speeds increase. A small craft advisory based on wind speeds will be needed for Tuesday afternoon, but an increase to gales in the nearshore is possible. At this point planning on holding off given offshore winds and borderline gales.
Envision the night shift will make the call on SCA vs Gale.

GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
SVNM4 - South Haven, MI 1 mi52 min N 8G8 53°F
HLNM4 - 9087031 - Holland, MI 26 mi58 min NNW 2.9G4.1 48°F30.01
45214 44 mi47 min 44°F0 ft


Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KLWA SOUTH HAVEN AREA RGNL,MI 3 sm16 mincalm10 smClear52°F39°F62%30.06
KBEH SOUTHWEST MICHIGAN RGNL,MI 20 sm58 mincalm10 smClear61°F36°F39%30.03
Link to 5 minute data for KLWA


Wind History from LWA
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Tide / Current for
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Weather Map
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Grand Rapids/Muskegon, MI,



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