Sunday, December8, 2019
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Marine Weather and Tides
Muskegon, MI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 8:02AMSunset 5:11PM Sunday December 8, 2019 12:12 AM EST (05:12 UTC) Moonrise 3:24PMMoonset 4:06AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 1005 Pm Est Sat Dec 7 2019
.gale warning in effect through Sunday afternoon...
Rest of tonight..South winds to 30 knots becoming gales to 35 knots toward daybreak. Partly cloudy. Waves 6 to 9 feet building to 7 to 10 feet toward daybreak.
Sunday..South gales to 35 knots veering southwest to 30 knots. Cloudy with a slight chance of rain showers. Waves 7 to 10 feet.
Sunday night..Southwest winds 15 to 20 knots decreasing to 5 to 15 knots late at night, then backing south toward daybreak. Rain showers likely. Waves 4 to 6 feet subsiding to 1 to 3 feet.
Monday..Southeast winds 5 to 10 knots veering west 10 to 15 knots late in the day. Rain showers. Waves 1 to 2 feet.
Monday night..Northwest winds to 30 knots. Rain showers likely and a chance of snow showers. Waves 2 to 4 feet building to 4 to 6 feet after midnight.
Tuesday..West winds to 30 knots. Cloudy with a chance of snow showers. Waves 6 to 8 feet.
Wednesday..Northwest winds to 30 knots. Mostly cloudy with a chance of snow showers. Waves 5 to 7 feet.
Thursday..South winds 15 to 25 knots. Mostly cloudy. Waves 2 to 3 feet building to 3 to 5 feet.
LMZ847 Expires:201912081000;;017331 FZUS53 KGRR 080305 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1005 PM EST Sat Dec 7 2019 For waters within five nautical miles of shore on Lake Michigan LMZ847-081000-


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 072334 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 634 PM EST Sat Dec 7 2019

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 111 PM EST Sat Dec 7 2019

- Light rain early in the week

- Arctic air with lake effect snow showers mid-week

- Clipper with light snow end of the week

DISCUSSION. (This evening through next Saturday) Issued at 111 PM EST Sat Dec 7 2019

Fairly tranquil pattern continues next couple days with a weak clipper bringing some light rain Sunday night and Monday. This will transition to snow on Tuesday as arctic front moves through. Lake effect snow showers expected in west flow regime by Tuesday night through Wednesday. Accumulations will be limited by 5 kft inversion heights but west flow should bring snow inland and a general 2 to 4 inches can be expected west of US.131 by late Wednesday.

Sfc high builds in Wednesday night and we can expect lake effect to end with some clearing. Sub zero readings could occur in the cold hollows Thursday morning if skies completely clear.

A clipper could bring some light snow at the end of the week or next weekend. There is some ensemble support for a southern stream moisture also being drawn north, so it will be interesting to see how this evolves in the next few days.

AVIATION. (For the 00Z TAFS through 00Z Sunday evening) Issued at 623 PM EST Sat Dec 7 2019

Challenging aviation forecast for tonight into Sunday. First off is that there will be a low level jet moving in toward daybreak. The main impact of this will be for an elevated risk for wind shear. The surface winds will be much lower and at a different angle versus the winds not too far off the ground. As the mixing increases during the morning the surface winds will closer to the winds not too far off the ground.

Next is the low level moisture surge that is forecast to lift up the MS Valley through the night and into MI toward daybreak. As a result an elevated risk for IFR or lower conditions exists for the TAFs. Already sub IFR conditions have moved into parts of northeast AR. We will need to monitor this closely as it would certainly cause some aviation impacts it if were to move into the TAF sites For now I trended the ceilings downward. but not quite to IFR toward daybreak.

MARINE. Issued at 111 PM EST Sat Dec 7 2019

No changes to the marine headlines. We still look for southwest winds gusting to 35 knots north of Holland late tonight and Sunday.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Lakeshore Flood Advisory until 7 PM EST Sunday for MIZ037-043- 050-056.

LM . Gale Warning until 4 PM EST Sunday for LMZ846>849.

Small Craft Advisory until 7 PM EST Sunday for LMZ844-845.



SYNOPSIS . Ostuno DISCUSSION . Ostuno AVIATION . MJS MARINE . Ostuno


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 4 mi33 min SSW 25 G 27 38°F 1021.9 hPa32°F
HLNM4 - 9087031 - Holland, MI 32 mi61 min SSE 11 G 17 36°F 38°F1020.9 hPa28°F
LDTM4 - 9087023 - Ludington, MI 50 mi61 min S 8.9 G 15 38°F 29°F

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI3 mi78 minSSE 810.00 miMostly Cloudy33°F24°F70%1022.2 hPa
Fremont Municipal Airport, MI20 mi78 minS 610.00 miFair33°F24°F72%1021 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrSE5E5CalmSE4E4SE3SE7SE7S7SE10SE7S10
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1 day agoSW7W9W10NW11
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NW9NW7NW7NW8NW6W5NW3W5W5W5S7S9S8S6S5SE6SE6SE5SE6SE5Calm

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 (0,6,7,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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weather_mapweather_map weather_map

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Disclaimer:
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 numerious 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.