Sunday, July25, 2021
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Marine Weather and Tides
Muskegon, MI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:27AMSunset 9:16PM Sunday July 25, 2021 12:34 PM EDT (16:34 UTC) Moonrise 9:48PMMoonset 6:55AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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LMZ847 Grand Haven To Whitehall Mi- 1105 Am Edt Sun Jul 25 2021
Rest of today..West winds around 5 knots backing southwest late in the day. Sunny. Waves 1 foot or less.
Tonight..South winds 5 to 10 knots. Mostly clear. Waves 1 foot or less.
Monday..South winds 10 to 15 knots. Sunny. Waves around 1 foot.
Monday night..Southwest winds 10 to 15 knots. Partly cloudy with a slight chance of showers and Thunderstorms. Waves 1 to 2 feet.
Tuesday..West winds 5 to 10 knots. Mostly Sunny with a slight chance of showers and Thunderstorms. Waves 1 to 2 feet.
Wednesday..Southeast winds around 10 knots veering southwest. Mostly Sunny. Waves 1 foot or less.
Thursday..Northwest winds around 10 knots veering north. Partly Sunny. Waves 1 to 2 feet.
LMZ847 Expires:202107252100;;433636 FZUS53 KGRR 251505 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1105 AM EDT Sun Jul 25 2021 For waters within five nautical miles of shore on Lake Michigan LMZ847-252100-


7 Day Forecast for Marine Location Near Muskegon, MI
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location: 43.23, -86.26     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 251118 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 718 AM EDT Sun Jul 25 2021

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 319 AM EDT Sun Jul 25 2021

- Early morning fog

- Warm and Dry into Wednesday

- Frontal wave brings convection Thursday

- Somewhat cooler but dry next weekend

DISCUSSION. (Today through next Saturday) Issued at 319 AM EDT Sun Jul 25 2021

- Early morning fog

Already we are seeing dense fog expand along and around I-94 and north of Route 10. Given the light winds behind the cold front, and the mostly clear skies I would expect the fog to expand until sunrise. The NAMNEST fog forecast shows just that. The RAP model version of that is not as extensive as the NAM but it too shows dense fog over a good part of the area.

Once the sun comes up, we should be able to quickly mix out the shallow fog.

- Warm and Dry into Wednesday

I would expect warm and dry weather today and Monday. That is thanks to shortwave ridging over our area behind the cold front. The center of the surface high passes south of us Monday during the day.

Since the polar jet is north of us, with front did not and will not bring any significantly cooler air with it. It will lower the dew point by 10 degrees or so through. There is a fair amount of subsidence so the relative humidity from near the surface to over 300 mb should stay below 50 percent over this area into Monday evening. That will mean even cumulus clouds during the day will be limited today and Monday.

The next northern stream shortwave tracks north of Lake Superior early Tuesday. That brings another cold front into northern lower Michigan. It seems clear to me there will be showers and thunderstorms with this. The trailing cold front will bring the risk of convection as far south as I-96 in the afternoon but there is still deep dry air in place so it will be hard to get to much from that. Still we will have to put low chance for thunderstorms due to this.

- Frontal wave brings convection Thursday

A stronger and more significant shortwave dives southeast later in the day Wednesday, but more so Thursday. This will bring a frontal wave into this area. This will be something like Saturday expect this time the frontal wave (which was over northern Michigan yesterday) will be over this area Thursday. That will increase the risk of a widespread convection. This will have the Decent surface based cape to work with and gfs model sounding show the equilibrium level above 200 mb. Also we will have a stronger mid- level jet streak closer to the event than we did on Saturday. So, this will be the next event to watch for potential severe storms.

- Somewhat cooler but dry next weekend

All of the models agree that behind this front (Thursday) we will get cooler air and it will be noticeably cooler. That is because the polar jet gets real close to us this time, instead of still being in central Canada like it will be today into Monday.

So here is what to watch for through for a little "weather fun" in the long range. The ECMWF is taking the "Polar Vortex" and displacing well south. In fact by Monday, August 2nd, it has 540 dm heights over southern Hudson Bay. That is the lowest height over the entire northern Hemisphere in the model at that time. If this truly does happen, we will get noticeably chilly for this time of year, even for here. The ECMWF is actually forecasting highs in the mid 70s for us the first few days of August. One other aspect to this is that if this does happen we will be in deep cold air, which means afternoon convection each day and maybe land and water spouts. The GFS does not go along with this and it should be pointed out that both models have been doing the same thing for several runs. So it will be fun to see how this plays out!

AVIATION. (For the 12Z TAFS through 12Z Monday morning) Issued at 718 AM EDT Sun Jul 25 2021

Once the fog mixes out, likely by 14z, expect nearly clear skies into Monday morning. Winds will be light into Monday morning.


MARINE. Issued at 319 AM EDT Sun Jul 25 2021

We may well need a small craft and beach hazard statement for the Thursday/Friday time fame, when the cooler air finally moves into the area. Until then though the push of cooler air today is not strong enough to cause high waves.

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

SYNOPSIS . WDM DISCUSSION . WDM AVIATION . WDM MARINE . WDM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 4 mi25 min WNW 7 G 8 74°F 1013.6 hPa66°F
45161 6 mi35 min WNW 5.8 G 7.8 72°F 72°F1 ft1014.2 hPa (+0.4)
45029 23 mi25 min WSW 3.9 G 3.9 73°F 74°F1 ft1013.8 hPa65°F
HLNM4 - 9087031 - Holland, MI 32 mi53 min SSW 5.1 G 5.1 74°F 75°F1013.8 hPa68°F
LDTM4 - 9087023 - Ludington, MI 50 mi53 min WSW 1 G 4.1 72°F 63°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI3 mi40 minW 810.00 miFair82°F62°F51%1013.5 hPa
Fremont Municipal Airport, MI20 mi40 minWNW 710.00 miFair83°F62°F49%1013.5 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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W10W4NW12N7CalmCalmCalmCalmW5NW4CalmS3CalmCalmCalmW3W5W7W8
1 day agoS8S9SW9SW9SW10SW7S7S7S4S4S5S9S9S9S9SW10SW13
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SW5SW6SW6CalmS5CalmE3CalmSE4SE5S6N8N7
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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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