Wednesday, April1, 2020
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Marine Weather and Tides
Muskegon, MI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:23AMSunset 8:13PM Wednesday April 1, 2020 4:29 PM EDT (20:29 UTC) Moonrise 11:35AMMoonset 2:27AM Illumination 63% Phase: Waxing Gibbous; Moon at 9 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- 405 Pm Edt Wed Apr 1 2020
Through early evening..Northwest winds 10 to 15 knots. Mostly Sunny. Waves around 1 foot.
Tonight..North winds 5 to 10 knots. Mostly clear. Waves around 1 foot.
Thursday..East winds around 5 knots veering west, then becoming west 5 to 10 knots late in the day. Mostly Sunny. Waves less than 1 foot.
Thursday night..North winds around 5 knots veering southeast toward daybreak. Partly cloudy. Waves less than 1 foot.
Friday..Southeast winds 5 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Friday night..Southeast winds 5 to 15 knots. Mostly cloudy with a chance of rain showers. Waves around 1 foot.
Saturday..Southeast winds 10 to 15 knots backing north. Rain showers likely. Waves 1 to 2 feet.
Sunday..East winds 10 to 15 knots backing northwest. Sunny. Waves around 1 foot.
Monday..South winds 10 to 15 knots. Mostly cloudy with a chance of rain showers. Waves 1 to 2 feet.
LMZ847 Expires:202004020800;;419756 FZUS53 KGRR 012005 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EDT Wed Apr 1 2020 For waters within five nautical miles of shore on Lake Michigan LMZ847-020800-


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 011932 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 332 PM EDT Wed Apr 1 2020

LATEST UPDATE . Synopsis/Discussion/Marine/Hydro

SYNOPSIS. Issued at 332 PM EDT Wed Apr 1 2020

-Forecast continues to feature warmer temperatures ahead

-Isolated showers this evening

-Dry weather expected overnight through Friday

-Chances for rain Friday night into Saturday night

-Rain and thunderstorm chances increase into early/mid next week

DISCUSSION. (This evening through next Wednesday) Issued at 332 PM EDT Wed Apr 1 2020

-- Forecast continues to feature warmer temperatures ahead --

Models continue to indicate rising heights as we head into the weekend and early next week. So, spring like temperatures will be found. Temperatures will be near or slightly above 60 in many areas the next couple of days with 70 a possibility as we head into early to mid next week.

-- Isolated showers this evening --

Isolated showers are occurring across portions of Southwest Lower Michigan at 3:00 pm and we expect this to continue into the evening hours. We feel the HRRRX has been handling this activity the best via the rapid refresh noaa website. This model shows showers continuing into the 10:00pm hour this evening. The showers should be on the light side overall and stem from some sunshine into a cool airmass aloft.

-- Dry weather expected overnight through Friday --

A period of dry weather is expected from overnight into Friday as high pressure is situated across the Great Lakes. Spring like temperatures will be seen as much more sunshine is expected the next two days as compared to yesterday and today.

-- Chances for rain Friday night into Saturday night --

Light rain may move in late Friday night, with the best chances occurring on Saturday. Prior runs of the ECMWF showed rain lingering into Sunday, but the latest runs are consistent with prior runs in keeping Sunday dry now. Precipitation amounts still look to be on the low side, less than 0.20 inches in most if not all areas.

-- Rain and thunderstorm chances increase into early/mid next week --

Precipitation chances increase next week as a deep southerly flow of air commences. It appears a warm front will lift into the area early in the week and rain may develop as early as Monday night. Better chances should occur Tuesday into Wednesday as a low moves out of the Rockies and into the Northern Plains. Chances for thunderstorms increase next week as well as the moisture return will be strong enough. PWAT values have the chance to exceed 1.0” and rainfall amounts in some the ECMWF ensemble members do the same. A few members in the overnight run had 24 hour totals of 1.5 inches. At this point not ready to commit to a heavy rain threat as its only a few members and the low passes well off to our north and west.

AVIATION. (For the 18Z TAFS through 18Z Thursday afternoon) Issued at 123 PM EDT Wed Apr 1 2020

Conditions are expected to improve at all terminals over the next 24 hours. Low clouds continue to hold in at most sites early this afternoon. Most of the IFR has lifted into a MVFR deck. Conditions are then becoming VFR at KMKG and areas north and west. This improving trend will slowly push SE through this evening, with clearing eventually taking place.

One caveat to this improving trend is the possibility of some low clouds and/or fog developing overnight, after clearing takes place. Data indicates that KLAN and KJXN has the best chance for this, probably due to clearing out later, and having more lingering boundary layer moisture.

Any lower clouds and fog will quickly mix out Thu morning toward 13z, leaving mostly clear skies, and winds under 10 knots.

MARINE. Issued at 332 PM EDT Wed Apr 1 2020

Rather quiet conditions are expected out on the big lake the next few days. The wind profiles in BUFKIT overviews show winds of 10 knots or less below 5,000ft all the way into Friday evening. What that means for waves on Lake Michigan is 1 foot or less tonight through at least Friday evening. Some 20 knot winds show up at 1,000ft Friday night, but this looks like it would remain aloft and not likely mix to the surface Bottom line. fairly light winds and small waves on Lake Michigan into Saturday.

HYDROLOGY. Issued at 332 PM EDT Wed Apr 1 2020

River levels across Southwest Lower Michigan remain elevated due to recent rains. The USGS percent of normal page shows much higher than normal levels along the Kalamazoo River basin and much of the Grand basin. The most impacted by far though are the rivers in the Kalamazoo basin where 90% percentile and above values are common. All of that said we have no sites that are at or forecast to reach Flood Stage. Rivers are either experiencing within bank rises or rises above bankfull that are not impacting anything. The sites that are either close to flood stage or have significant within bank rises are all on the Grand and include Ionia, Comstock Park and Robinson TWP. The good thing is that we are expecting mainly dry conditions the next couple of days which should allow rivers to slowly fall. The next chance for precipitation comes Friday night into Saturday and amounts do not look too heavy, on the order of a quarter of an inch or less. The rivers should not be impacted too much by a quarter of an inch.

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

SYNOPSIS . Duke DISCUSSION . Duke AVIATION . NJJ HYDROLOGY . Duke MARINE . Duke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 4 mi29 min NNW 13 G 14 41°F 1019.3 hPa (-0.4)37°F
HLNM4 - 9087031 - Holland, MI 32 mi65 min NW 8 G 9.9 39°F 45°F1017.9 hPa38°F
LDTM4 - 9087023 - Ludington, MI 50 mi65 min N 8 G 14 45°F 35°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI3 mi34 minNNW 610.00 miOvercast48°F37°F66%1018.3 hPa
Fremont Municipal Airport, MI20 mi33 minN 05.00 miHeavy Rain45°F40°F84%1017.6 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrCalmN7N7--N8N5N6N6N4N3NE5NE5N3N45N5N4NE6NE643W9W8N6
1 day agoN15N7NW8N7N8N6NW6N7N7N7N5N5N5N6N6N7NE8NE7NE9NE7NE5NE3NE5N5
2 days agoSW21
G34
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of GreatLakes    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Grand Rapids, MI (16,3,4,5)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.