Wednesday, September23, 2020
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Marine Weather and Tides
Whitehall, MI

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:32AMSunset 7:41PM Wednesday September 23, 2020 2:38 PM EDT (18:38 UTC) Moonrise 2:02PMMoonset 11:02PM Illumination 39% Phase: Waxing Crescent; Moon at 6 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 Wed Sep 23 2020
Rest of today..Southwest winds around 10 knots. Sunny. Waves around 1 foot.
Tonight..Southwest winds around 10 knots. Partly cloudy. Waves around 1 foot.
Thursday..South winds 10 to 15 knots. Partly Sunny. Waves 1 to 3 feet.
Thursday night..South winds 10 to 15 knots. Partly cloudy. Waves 1 to 3 feet.
Friday..South winds 15 to 20 knots. Sunny. Waves 1 to 3 feet building to 2 to 4 feet.
Saturday..Southwest winds 15 to 25 knots. Partly Sunny with a chance of rain showers. Waves 3 to 5 feet.
Sunday..West winds 10 to 15 knots. Partly Sunny with a chance of rain showers. Waves 2 to 4 feet.
LMZ847 Expires:202009232100;;247293 FZUS53 KGRR 231506 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1105 AM EDT Wed Sep 23 2020 For waters within five nautical miles of shore on Lake Michigan LMZ847-232100-


7 Day Forecast for Marine Location Near Whitehall, MI
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location: 43.39, -86.34     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 231712 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 112 PM EDT Wed Sep 23 2020

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 245 AM EDT Wed Sep 23 2020

- Warm and mainly dry mid to late week

- Smoke aloft at times

- Rain late Saturday into early next week

DISCUSSION. (Today through Tuesday) Issued at 245 AM EDT Wed Sep 23 2020

- Warm and mainly dry mid to late week

Mild and predominantly dry wx will continue through midday Saturday. Some patchy early morning fog is expected today especially north of KMKG/KGRR. The visby has been down to a quarter of a mile at times at Fremont early this morning and we expect fog to gradually become a bit more prevalent early today.

A few rain showers may affect central lower MI Thursday afternoon and evening in closer proximity to the warm front over the northern Great Lakes region. High temps will reach well into the 70s mid to late week.

- Smoke aloft at times

Smoke aloft will continue to advect in mid to late week due to westerly mid level winds. HRRR smoke dispersion progs suggest that smoke will linger today and again be most prevalent over our southern fcst area. High temps may be held down by a degree or two on days that smoke is rather thick.

- Rain late Saturday into early next week

A strong cold front will bring rain and potentially some convection Saturday afternoon and Saturday night. Post frontal rain showers are forecast Sunday and especially early next week as the upper trof digs in. Lake induced instability with h8 temps falling to as low as 0 to -2 C by Tuesday will also support potential for lake effect rain showers.

AVIATION. (For the 18Z TAFS through 18Z Thursday afternoon) Issued at 111 PM EDT Wed Sep 23 2020

I expect VFR conditions through Thursday at all TAF sites.

I will say through it would not be out of the question there could be a little patchy fog around sunrise but there will be a little more wind in the boundary layer than early this morning so I do not think it will be as extensive as this morning.

There is a frontal wave moving through the western and central Great Lakes tonight into Thursday. However the surface front will be over northern lower Michigan so the clouds and weather associate with that system should stay well north of our TAF sites into Thursday evening.


MARINE. Issued at 245 AM EDT Wed Sep 23 2020

Wave heights and winds should remain below small craft criteria through Friday afternoon. Waves and winds will increase Friday night and Saturday ahead of a strong cold front. Marine headlines will likely eventually be needed for this time frame and then continuing into early next week as significantly cooler air crossing relatively warm lake waters leads to choppy and unstable conditions with potential for some waterspouts by then as well.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MKGM4 - Muskegon, MI 11 mi29 min SW 8 G 8.9 68°F 1016.5 hPa63°F
45161 14 mi39 min 3.9 G 5.8 66°F 65°F1 ft1016.8 hPa (-0.7)
45029 34 mi29 min W 7.8 G 9.7 65°F 65°F1 ft1016.6 hPa60°F
LDTM4 - 9087023 - Ludington, MI 39 mi57 min SSW 6 G 8 66°F 60°F
45024 41 mi29 min S 7.8 G 9.7 65°F 64°F1 ft1016.6 hPa62°F
HLNM4 - 9087031 - Holland, MI 43 mi51 min S 8.9 G 8.9 65°F 64°F1016.6 hPa64°F
BSBM4 - Big Sable Point, MI 47 mi59 min S 6 G 8 70°F 1016.9 hPa

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Muskegon, Muskegon County Airport, MI15 mi44 minSW 910.00 miPartly Cloudy74°F60°F62%1016.5 hPa
Fremont Municipal Airport, MI19 mi44 minWSW 910.00 miFair78°F58°F51%1015.9 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrSW10SW8SW9S6S7S4S4S4CalmCalmS3SW3S3CalmCalmCalmCalmCalmCalmSW54SW6SW9SW9
1 day agoS10SW9S6SW6S3CalmCalmSE6SE4SE6SE7SE5SE5CalmS3S3SE4SE3SE4CalmS8SW8SW6SW9
2 days agoS83S5SE9CalmCalmCalmSE4SE8SE9SE9SE10SE8SE5SE5E6E4SE5SE6SE7S6S11
G16
S10S12

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    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
Ground Weather Radar Station Grand Rapids/Muskegon, MI
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weather_mapweather_map weather_map


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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.