Wednesday, January27, 2021
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Marine Weather and Tides
Muskegon, MI

Version 3.4
NOTICE
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 8:03AMSunset 5:52PM Wednesday January 27, 2021 9:40 PM EST (02:40 UTC) Moonrise 4:37PMMoonset 7:35AM Illumination 100% Phase: Full Moon; Moon at 15 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 Est Wed Jan 27 2021
.small craft advisory in effect through Thursday morning...
Through early evening..North winds 15 to 20 knots. Mostly cloudy. Waves 2 to 4 feet.
Tonight..North winds 10 to 20 knots. Partly cloudy in the evening then becoming mostly cloudy. A chance of snow showers. Waves 2 to 4 feet.
Thursday..Northwest winds 10 to 15 knots. Mostly cloudy with a chance of snow showers. Waves 2 to 4 feet.
Thursday night..North winds 5 to 15 knots veering northeast toward daybreak. Partly cloudy. Waves 2 to 3 feet.
Friday..Southeast winds 5 to 10 knots. Mostly Sunny. Waves 1 foot or less.
Friday night..Southeast winds 10 to 20 knots. Mostly cloudy. Waves around 1 foot.
Saturday..East winds 15 to 25 knots. Mostly cloudy. Waves 1 to 3 feet.
Sunday..East winds 20 to 25 knots. Cloudy with a chance of snow showers. Waves 1 to 3 feet.
Monday..North winds 10 to 15 knots. Mostly cloudy. Waves 1 to 3 feet.
LMZ847 Expires:202101280900;;591534 FZUS53 KGRR 272105 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EST Wed Jan 27 2021 For waters within five nautical miles of shore on Lake Michigan LMZ847-280900-


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 272352 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 652 PM EST Wed Jan 27 2021

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 330 PM EST Wed Jan 27 2021

- Light Lake Effect Snow Tonight and Thursday

- Ridge Brings Quiet Weather to End the Work Week

- Watching System Over The Weekend for Snow

DISCUSSION. (This evening through next Wednesday) Issued at 330 PM EST Wed Jan 27 2021

-- Light Lake Effect Snow Tonight and Thursday --

Instability is surely in place tonight and Thursday with delta t's on the order of 20C tonight. That is only one portion of the equation however. Moisture, especially in regard to depth is a negative factor with depths noted at less that 5,000ft. The best chance for lake effect on our area will come overnight in a northerly flow and a connection off of Lake Superior. A land breeze will add some convergence to the situation and boost the band a bit, which largely be off shore. There is not much upper support in terms of shortwaves to add moisture or lift. So, scattered snow shower and flurries for the most part. The exception will be at times overnight when a band tries to affect the Points and potentially down towards South Haven. Could envision some light accumulations especially up near the points if the band remains over Mason and Oceana Counties for a time. A localized inch or two now out of question, but most locales inch or less.

-- Ridge Brings Quiet Weather to End the Work Week --

A ridge of high pressure will bring a quiet end to the work week with dry weather expected from Thursday night through Saturday. A cold couple of night for sure tonight and again Thursday night under solid radiational cooling conditions. Single digits will show up again both nights.

-- Watching System Over The Weekend for Snow --

The main focus of the forecast is on the system for the weekend. Trends in the models have not change appreciably from yesterday to today. There may be a slight jog to the north back towards are area though. We will have to see if this trend continues. The wave in question is actually off the coast of British Columbia at this time. The wave dives southward into the trough and is then kicked inland across California on Friday, emerging into The Plains on Saturday. The upper wave is losing some punch as it comes our direction, becoming an open wave with time. At the surface, the low is filling with time as it tracks eastward off to our south. Still, the system makes a close enough approach to the area that we have the threat of a swath of snow across our forecast area. At this time, the southern half of the CWA would stand the best chance, basically along and south of I-96. Too early to make any statements with much certainty however. The operational ECWMF would give a couple inches to the far southwest corner of the CWA, with the GFS painting more of a swath of advisory type snows for the southern half (Saturday night into Sunday).

Ensemble means show the low tracking across Central or Southern portions of Indiana, again losing strength as it does. The GFS shows a fairly high, somewhat shallow DGZ Saturday night and Sunday at AZO. So, it doesn't look like a prolific snow to me even if the GFS pans out. It bears watching for sure as it may reach advisory levels.

AVIATION. (For the 00Z TAFS through 00Z Thursday evening) Issued at 652 PM EST Wed Jan 27 2021

Stratocumulus cloud deck with bases at VFR levels of 3500-4500 ft may develop some breaks in it tonight but then fill back in on Thursday. There could be a few flurries and MVFR cigs, particularly on Thursday afternoon as the northerly winds back to the northwest, but not much expected in terms of vsby reductions. MKG however could see a few brief periods of MVFR or lower vsbys if/when any better lake effect bands impact the terminal there.

MARINE. Issued at 330 PM EST Wed Jan 27 2021

No change made to the going headline. Small Craft Advisory remains in effect through 700am Thursday morning. Northerly winds around 20 knots will keep waves up a bit this evening and tonight at 3 to 5 feet, especially up near the Points and down towards South Haven. A period of lower winds and waves are expected from Thursday into Friday as a ridge of high pressure moves through the region.

Winds on Saturday will ramp up to Small Craft Advisory levels, although winds will be off shore. Highest waves will be found out over the open water.

GRR WATCHES/WARNINGS/ADVISORIES. MI . None. LM . Small Craft Advisory until 7 AM EST Thursday for LMZ844>849.



SYNOPSIS . Duke DISCUSSION . Duke AVIATION . Meade MARINE . Duke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 4 mi30 min NE 8 G 9.9 22°F 1032.9 hPa13°F
HLNM4 - 9087031 - Holland, MI 32 mi52 min N 9.9 G 13 33°F1029 hPa
LDTM4 - 9087023 - Ludington, MI 50 mi52 min N 1.9 G 2.9

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI3 mi45 minN 79.00 miLight Snow23°F11°F60%1031.7 hPa
Fremont Municipal Airport, MI20 mi63 minN 810.00 miOvercast21°F11°F64%1029.5 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrN8N4CalmCalmCalmN5N3N5NE5E4CalmSW3CalmCalmN4N9NW9N8N9N9N10N11N9N7
1 day agoNE12
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2 days agoSE4SE3E3CalmCalmCalmCalmCalmCalmCalmCalmNE8NE5NE7N6N6N9NE10NE9
G18
NE10NE8NE8NE8E13

Tide / Current Tables for
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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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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.