Monday, September21, 2020
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Marine Weather and Tides
Grand Haven, 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 7:30AMSunset 7:45PM Monday September 21, 2020 5:29 AM EDT (09:29 UTC) Moonrise 11:38AMMoonset 9:33PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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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LMZ846 Holland To Grand Haven Mi- 406 Am Edt Mon Sep 21 2020
Early this morning..Southeast winds 10 to 20 knots. Clear. Waves 1 to 3 feet.
Today..South winds 5 to 15 knots. Sunny. Waves 1 to 3 feet.
Tonight..South winds 5 to 15 knots. Mostly clear. Waves 1 to 3 feet.
Tuesday..Southwest winds 10 to 15 knots. Sunny. Waves 1 to 3 feet.
Tuesday night..Southwest winds 10 to 15 knots. Mostly clear. Waves 1 to 2 feet.
Wednesday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves 1 to 2 feet.
Thursday..Southwest winds 10 to 15 knots. Mostly Sunny. Waves 1 to 3 feet.
Friday..South winds 10 to 20 knots. Sunny. Waves 1 to 2 feet.
LMZ846 Expires:202009212000;;135878 FZUS53 KGRR 210806 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 406 AM EDT Mon Sep 21 2020 For waters within five nautical miles of shore on Lake Michigan LMZ846-212000-


7 Day Forecast for Marine Location Near Grand Haven, MI
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location: 43.05, -86.36     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 210727 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 327 AM EDT Mon Sep 21 2020

LATEST UPDATE . Synopsis/Discussion/Marine

SYNOPSIS. Issued at 325 AM EDT Mon Sep 21 2020

- Dry with moderating trend of temps this week

- Smoke aloft returns

- Next good chance for rain Sunday into early next week

DISCUSSION. (Today through next Sunday) Issued at 325 AM EDT Mon Sep 21 2020

- Dry with moderating trend of temps this week

A consensus of latest short to medium range guidance continues to indicate that temps will undergo a gradual moderating trend this week. High temps will reach into the 70s for most of the week and could flirt with the 80 degree mark late in the week and Saturday.

Dry wx is forecast through the upcoming week with a large sfc ridge to the east of our region remaining in control of the wx pattern.

- Smoke aloft returns

Mid level winds becoming westerly will cause smoke aloft to advect back into our area. This notion is also supported by short term smoke dispersion forecasts from the HRRR. Max temps will probably be held down by a couple of degrees this week on days that smoke is most prevalent.

- Next good chance for rain Sunday into early next week

An overall medium range guidance consensus continues to suggest that a rather strong cold front will bring the next good chance for rain by Sunday with post frontal showers expected to linger early next week as the upper trof axis moves overhead.

AVIATION. (For the 06Z TAFS through 06Z Monday night) Issued at 128 AM EDT Mon Sep 21 2020

VFR conditions continue through Monday night. Winds will be southeast to south 5 to 10 knots with some gusts near 20 knots on Monday.

MARINE. Issued at 325 AM EDT Mon Sep 21 2020

A small craft advisory is in effect for our northern two marine zones along with a beach hazards statement into this evening. Increasing southeast to southerly winds will cause wave heights to increase to around 3 to 5 feet there today.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Beach Hazards Statement through this evening for MIZ037-043.

LM . Small Craft Advisory until 8 PM EDT this evening for LMZ848-849.



SYNOPSIS . Laurens DISCUSSION . Laurens AVIATION . Ostuno MARINE . Laurens


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45161 9 mi50 min 14 G 18 58°F 63°F3 ft1029.1 hPa
45029 11 mi30 min WNW 14 G 19 57°F 64°F2 ft1029.5 hPa (-0.4)46°F
MKGM4 - Muskegon, MI 12 mi40 min SSE 7 G 9.9 53°F 1030.2 hPa41°F
HLNM4 - 9087031 - Holland, MI 21 mi60 min E 13 G 17 53°F 63°F1028.7 hPa44°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 44 mi40 min SSE 18 G 21 62°F 66°F4 ft1028.8 hPa55°F
45168 45 mi30 min E 12 G 16 54°F 62°F1 ft1029.8 hPa (-0.4)44°F
SVNM4 - South Haven, MI 45 mi50 min E 12 G 14 51°F
LDTM4 - 9087023 - Ludington, MI 62 mi60 min SE 6 G 12 55°F 39°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, MI10 mi35 minSE 510.00 miFair49°F39°F71%1029.8 hPa

Link to 5 minute data for KMKG

Wind History from MKG (wind in knots)
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Last 24hrSE3E3CalmE4S6SE8S7S9S8
G15
S83S5SE9CalmCalmCalmSE4SE8SE9SE9SE10SE8SE5SE5
1 day agoSE3CalmE4SE5SE9SE11SE7SE8SW6CalmW9W6W6W5CalmCalmCalmCalmE3CalmCalmCalmCalmE3
2 days agoNE3N6N6NE9NE9
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Calm5NE5N4N10N8N5N8NE4E5E3SE3SE3

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.