Friday, July10, 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 6:13AMSunset 9:27PM Friday July 10, 2020 9:09 PM EDT (01:09 UTC) Moonrise 11:54PMMoonset 10:43AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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 Fri Jul 10 2020
.small craft advisory in effect through Saturday morning...
Through early evening..Northwest winds 20 to 25 knots. Partly Sunny with a chance of showers and Thunderstorms. Waves 3 to 5 feet.
Tonight..Northwest winds 15 to 25 knots decreasing to 10 to 15 knots after midnight. Mostly clear. Waves 3 to 5 feet subsiding to 2 to 3 feet after midnight.
Saturday..Northwest winds 10 to 20 knots. Mostly Sunny. Waves 2 to 3 feet.
Saturday night..North winds 5 to 15 knots. Partly cloudy with a slight chance of showers and Thunderstorms. Waves 1 to 2 feet.
Sunday..North winds 10 to 20 knots. Partly Sunny. Waves 2 to 4 feet.
Sunday night..North winds 10 to 20 knots. Partly cloudy. Waves 2 to 3 feet.
Monday..Northwest winds 10 to 15 knots. Mostly Sunny. Waves 1 to 2 feet.
Tuesday..South winds 10 to 15 knots. Mostly Sunny. Waves 1 to 3 feet.
Wednesday..West winds around 15 knots veering northwest late in the day. Partly Sunny with a chance of showers and Thunderstorms. Waves 2 to 3 feet.
LMZ847 Expires:202007110800;;639536 FZUS53 KGRR 102006 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 405 PM EDT Fri Jul 10 2020 For waters within five nautical miles of shore on Lake Michigan LMZ847-110800-


7 Day Forecast for Marine Location Near Muskegon, MI
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As of July 8 NOAA did a network migration which caused this Forecast section to break. They are aware of the problem and working on it with high priority.
location: 43.23, -86.26     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 102328 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 728 PM EDT Fri Jul 10 2020

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 318 PM EDT Fri Jul 10 2020

- Cooler and less humid into early next week

- Next good chance of rain Tuesday night/Wednesday

- Heat builds again later next week

DISCUSSION. (This evening through next Friday) Issued at 318 PM EDT Fri Jul 10 2020

-- Cooler and less humid into early next week --

Showers and isolated storms with the front that is now approaching U.S.-127 at 3 pm/19z have been well behaved this afternoon. The thinking before still applies, with the area having been worked over by morning convection, and very limited shear being right in the upper trough and mid level winds south of the area. The trough will slowly migrate to the east through tonight, taking any left over showers and isolated storms with it. Can not rule out some fog tonight with the recent rain. However, it seems that enough wind aloft should limit the potential.

The weekend, and even Monday look cooler and much less humid than the recent week of heat and humidity. Most of the period looks dry, although each day there is a small chance of a shower/storm. The trend has been for the upper troughing digging in to be a bit further south than expected 24 hours ago. This will bring a little cooler air over the area, and it will take short wave activity a little further south.

We will be under short wave ridging for much of Saturday, in between the departing trough, and the next short wave that will approach Sunday morning. This short wave will focus most of its forcing to our south, taking most of the precipitation with it. We will have a weak sfc front drop through Sunday afternoon. This will not have a lot of moisture or instability to work with. The next short wave in the series for Monday should then stay north of the area as the long wave ridge starts to build toward the area.

-- Next good chance of rain Tuesday night/Wednesday --

The ridge will build over the area on Tuesday, bringing warmer temperatures back to the area. The warm air does not look as pronounced as it did yesterday, with heights expected to be not quite as high, and a limited elevated mixed layer coming in from the Plains. Then, lower heights translating along the U.S./Canadian border will beat the ridge down temporarily. This will bring a cold front into the area Tue night into Wed, and a chance of showers and storms.

-- Heat builds again later next week --

The front and lower heights Tue Night and Wed may delay the heat coming back for a little while longer. Heights are not shown to rise significantly next week, however a hot air mass over the Plains looks to be advected toward the area. The pattern is starting to look like maybe a ring of fire might be setting up late next week and next weekend with a broad scale ridge, and the jet stream just north of the area helping to provide impulses on the edge of the heat dome. Tough to tell this far out exactly where the axis might be. This will be something to watch, along with the magnitude of the heat for the area.

AVIATION. (For the 00Z TAFS through 00Z Saturday evening) Issued at 728 PM EDT Fri Jul 10 2020

VFR conditions will continue through Saturday afternoon. Showers and thunderstorms will continue to move east of LAN and JXN this evening. Northwest winds will gust over 20 knots early this evening then diminish after sunset.

MARINE. Issued at 318 PM EDT Fri Jul 10 2020

We will be keeping the marine headlines as is with this forecast package. The conditions along the shoreline are about as expected this afternoon. The winds and waves are a little higher down south than up north with the NW flow and longer fetch. Conditions will peak this evening, before gradually improving overnight.

Winds and waves will be better on Saturday, although it will not be completely tranquil with winds around 15 knots or so, and waves of 2 to 4 feet. Winds will be on the lighter side early Sunday, before increasing in the afternoon with the passage of a cool front. This may bump the winds up to 20 knots or so, and waves will be at least a couple of feet.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Beach Hazards Statement through Saturday morning for MIZ050-056- 064-071.

Beach Hazards Statement until midnight EDT tonight for MIZ037- 043.

LM . Small Craft Advisory until midnight EDT tonight for LMZ848-849.

Small Craft Advisory until 8 AM EDT Saturday for LMZ844>847.



SYNOPSIS . NJJ DISCUSSION . NJJ AVIATION . Ostuno MARINE . NJJ


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 4 mi29 min NNE 11 G 15 77°F 1009.6 hPa65°F
45029 23 mi19 min NW 14 G 18 74°F 74°F3 ft1009.8 hPa68°F
HLNM4 - 9087031 - Holland, MI 32 mi51 min NNW 15 G 17 74°F 74°F1009.9 hPa71°F
LDTM4 - 9087023 - Ludington, MI 50 mi57 min N 2.9 G 5.1 76°F 64°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, MI3 mi74 minNNW 12 G 2210.00 miA Few Clouds79°F64°F62%1009.8 hPa
Fremont Municipal Airport, MI20 mi74 minNNW 13 G 2210.00 miPartly Cloudy76°F65°F70%1010.2 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrE6E8SE8N5NW13
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N10E7E6SE8SE7S4S5S5W6W10NW8N13NW13
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1 day agoW3CalmCalmE3CalmCalmCalmE3SE5CalmCalmS4SW7S10S11S9SW10
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SW10SW6S5SE8E9E6
2 days agoW9NW7W6NW4N5CalmE5CalmCalmSE3S3SW5SW53W7SW7W8W9W8SW7W7S7SW6W5

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 (21,6,7,8)
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Ground Weather Radar Station Grand Rapids/Muskegon, MI
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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 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.