Monday, April19, 2021
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Marine Weather and Tides
Grand Haven, MI

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:54AMSunset 8:34PM Monday April 19, 2021 6:08 PM EDT (22:08 UTC) Moonrise 10:51AMMoonset 1:58AM Illumination 55% Phase: First Quarter Moon; Moon at 8 days in cycle
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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LMZ846 Holland To Grand Haven Mi- 405 Pm Edt Mon Apr 19 2021
.small craft advisory in effect through late tonight...
Through early evening..West winds around 15 knots. Cloudy. Waves 3 to 5 feet.
Tonight..Northwest winds 10 to 20 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 3 to 5 feet.
Tuesday..Northwest winds 10 to 15 knots. Cloudy. Waves 2 to 3 feet.
Tuesday night..North winds 10 to 15 knots. Partly cloudy. Waves 1 to 2 feet.
Wednesday..Northwest winds 15 to 20 knots. Sunny. Waves 1 to 3 feet.
Wednesday night..West winds 10 to 15 knots. Mostly clear. Waves 1 to 3 feet.
Thursday..West winds 15 to 20 knots. Sunny. Waves 2 to 4 feet.
Friday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves 2 to 4 feet.
Saturday..South winds 10 to 15 knots veering west late in the day. Partly Sunny with a chance of rain showers. Waves 2 to 3 feet.
LMZ846 Expires:202104200800;;808965 FZUS53 KGRR 192005 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EDT Mon Apr 19 2021 For waters within five nautical miles of shore on Lake Michigan LMZ846-200800-


7 Day Forecast for Marine Location Near Grand Haven, MI
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location: 43.05, -86.36     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 191903 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 303 PM EDT Mon Apr 19 2021

LATEST UPDATE . Synopsis/Discussion/Marine

SYNOPSIS. Issued at 302 PM EDT Mon Apr 19 2021

-Widespread hard freeze likely Tue and Wed nights

-Accumulating snow threat continues to diminish

-Temps return to normal late in week

DISCUSSION. (This evening through next Monday) Issued at 302 PM EDT Mon Apr 19 2021

--Widespread hard freeze likely Tue and Wed nights--

Widespread low temps in the mid 20s are looking like a near certainty on both Tuesday night and Wednesday night. However a westerly wind off Lk MI of 10-15 mph on Wednesday night could lead to less severe temps along the shoreline.

The expected temps are cold enough to cause significant damage to already budding/blossoming fruit trees in west MI, and given the high confidence will upgrade the freeze watch now to a freeze warning. Crop losses are very possible as previous warm spells resulted in earlier than normal blooms.

Even as early as tonight we get lows in the mid to upper 20 to the north of I-96, and we already have a freeze warning in effect over the northwest 4 counties of the GRR CWFA. We are not yet issuing freeze headlines for our 4 northeast counties.

--Accumulating snow threat continues to diminish--

12Z guidance continues the farther south trend with the swath of accumulating snow for late Tuesday and Tuesday night. It now looks like only the I-94 corridor is in play for some potential light accumulations, and mainly east of AZO/BTL. Given the trends will hold off on a winter weather advisory for snow since it's entirely possible that even JXN sees very little snow.

--Temps return to normal late in week--

The deep upper trough that will be overhead mid-week is booted out by another trough digging south in wrn Canada. That allows temps to return to closer-to-normal values Friday into the weekend. A shortwave moving east from the Rockies, followed by a sfc cold front, brings a chance of showers on Friday night and Saturday.

AVIATION. (For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1251 PM EDT Mon Apr 19 2021

The main focus of this set of forecasts is dealing with the ongoing rain, and how long it affects the area. The next round of precipitation looks like it will come just after this period.

Band of rain is just moving into the eastern sites, while it has moved out of KMKG and will soon at KGRR. MVFR ceilings and visibilities are dominant in this area of rain. Can not rule out some isolated IFR, but it will not be widespread enough to mention. The MVFR ceilings will hold in a little after the rain ends from NW to SE through about 01z, with VFR after that. Winds will be a little gusty this afternoon from the west and northwest. These winds will diminish by mid evening.

We will see ceilings below 5k feet disappear overnight, leaving a mid deck at all locations. Low clouds will try to move in toward 18z, but it looks like it will be just after 18z that the clouds and light snow will move in along the I-94 terminals.

MARINE. Issued at 302 PM EDT Mon Apr 19 2021

West-northwest winds of 10-20 kts behind the cold front is resulting in a period of hazardous 3-5 ft waves, especially north of Holland. Diminishing trend arrives this evening although hazardous conditions probably hanging on through most of the night near Big and Little Sable Points. Small Craft Advisories may be needed again on Wednesday in cold NNW flow of 10-20 kts.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Freeze Warning from 8 PM Tuesday to 11 AM EDT Thursday for MIZ037-038-043-044-050>052-056>059-064>067-071>074.

Freeze Warning from 1 AM to 8 AM EDT Tuesday for MIZ037-038-043- 044.

LM . Small Craft Advisory until 8 AM EDT Tuesday for LMZ848-849.

Small Craft Advisory until 5 PM EDT this afternoon for LMZ845>847.



SYNOPSIS . Meade DISCUSSION . Meade AVIATION . NJJ MARINE . Meade


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45029 11 mi38 min WNW 12 G 16 40°F 41°F3 ft1012.4 hPa32°F
MKGM4 - Muskegon, MI 12 mi28 min WNW 13 G 14 41°F 1012.1 hPa35°F
HLNM4 - 9087031 - Holland, MI 21 mi50 min WNW 13 G 16 41°F 50°F1011 hPa35°F
45168 45 mi38 min NW 7.8 G 9.7 41°F 45°F1 ft1013.2 hPa32°F
SVNM4 - South Haven, MI 45 mi38 min 11 G 13 40°F
LDTM4 - 9087023 - Ludington, MI 62 mi56 min W 8 G 11 41°F 29°F

Wind History for Holland, MI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI10 mi73 minW 1310.00 miOvercast44°F30°F58%1011 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrSW6S4S3CalmS5S6S10SW10SW13SW15
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1 day agoW8NW5W3CalmCalmW4NW4NW5N5CalmCalmCalmCalmCalmCalmCalmCalmN5SW9W10SW11SW11SW8SW8
2 days agoNW7NW5W5W5N5N5N6NE6N4N4N5N5N5N4N3CalmCalmW4W8W12NW9NW9W11
G19
W11

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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