Saturday, January25, 2020
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Marine Weather and Tides
Grand Ledge, 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 7:58AMSunset 5:43PM Saturday January 25, 2020 2:21 AM EST (07:21 UTC) Moonrise 8:44AMMoonset 6:31PM Illumination 0% Phase: New Moon; Moon at 0 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- 1005 Pm Est Fri Jan 24 2020
Rest of tonight..Southeast winds 10 to 15 knots veering south toward daybreak. Rain showers likely and areas of drizzle. Patchy fog. Waves 1 to 2 feet.
Saturday..Southeast winds 10 to 15 knots veering west 5 to 10 knots late in the day. Cloudy with a chance of rain showers and areas of drizzle. Waves 1 to 3 feet.
Saturday night..West winds 10 to 20 knots. Cloudy with a chance of rain showers. Waves 1 to 3 feet.
Sunday..Northwest winds 15 to 20 knots. Cloudy with a chance of rain and snow showers. Waves 2 to 4 feet.
Sunday night..Northwest winds 10 to 15 knots. Cloudy. Waves 2 to 3 feet.
Monday..North winds 10 to 15 knots. Cloudy. Waves 1 to 3 feet.
Tuesday..West winds 5 to 15 knots. Mostly cloudy. Waves around 1 foot.
Wednesday..South winds around 10 knots veering west late in the day. Cloudy. Waves 1 foot or less.
LMZ846 Expires:202001251000;;471776 FZUS53 KGRR 250306 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1005 PM EST Fri Jan 24 2020 For waters within five nautical miles of shore on Lake Michigan LMZ846-251000-


7 Day Forecast for Marine Location Near Grand Ledge, MI
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location: 42.75, -84.75     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 250603 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 103 AM EST Sat Jan 25 2020

LATEST UPDATE . Update/Synopsis/Aviation/Marine

SYNOPSIS. Issued at 102 AM EST Sat Jan 25 2020

- Dense fog will spread northward through mid morning today

- As our surface system moves out of the area slowly we will see periods of showers of mostly snow but some rain may mix in a times. Amounts will be meager at best. Temperatures will stay on in the 30s mostly.

- Still anticipating mainly quiet weather into much of next week however toward the weekend another significant system is not out of the question.

UPDATE. Issued at 102 AM EST Sat Jan 25 2020

As we anticipated we have a fairly extensive area of fog, that is in many locations dense. The fog is mostly near and south of I-96 but it will expand north to near Route 10 by 3-5 am this morning. Problem is the fog is related to the lack of pressure gradient with the surface low. As the surface low slowly lifts north over the next few hours so will the fog. Which means the southern edge of the fog will lift north over time. So putting a fog advisory would be glitch as the fog area moves over time. Also most area are not less than a 1/4 miles, most are around a 1/2 mile. In any event the fog will mostly be gone by mid morning.

DISCUSSION. (This evening through next Friday) Issued at 315 PM EST Fri Jan 24 2020

-- Light rain and fog will periodically mix with snow through Sunday with little to no impacts expected --

Primarily rain has been observed today. Thermal profiles continue to indicate that rain will be the predominant p-type into this evening but occasional snow may mix in, with no impacts expected given surface temps above freezing. Dew points are also above freezing, so this will continue mitigating impacts to most travel. Exceptions do include rural country roads and less traveled secondary/tertiary roads that have residual slush, which could be locally slick.

Later tonight into early Saturday, there is still a window for wet snow but again with little to no impacts expected. WI/IL stands the best chance for impactful snow accumulations given colder low level, wrap-around air on the W/NW side of the low pressure system. Drizzle or light snow showers are possible Saturday but otherwise it will just be cloudy and damp.

Fog development still looks on track after assessing observation trends and a consensus of high resolution guidance. Some areas of dense fog are possible at times tonight into Saturday. Not sure if this will rise to the occasion of an advisory, however.

-- Still anticipating mainly quiet weather into much of next week --

Aside from a few light rain or snow showers at times toward the second half of next week, there will not be much going on across the Great Lakes region with warmer than normal temperatures expected.

AVIATION. (For the 06Z TAFS through 06Z Saturday night) Issued at 102 AM EST Sat Jan 25 2020

IFR/LIFR will be common early this morning with occasional 1/4SM fog before 10Z. Ceilings will remain IFR/LIFR through the forecast period while visibility fluctuates depending on fog/drizzle/snow showers. Winds will be light from the south becoming west later on.

MARINE. Issued at 102 AM EST Sat Jan 25 2020

Due to a largely weak surface pressure pattern over the next few days it would seem no marine headlines will be needed.

HYDROLOGY. Issued at 315 PM EST Fri Jan 24 2020

With light rain and some snowmelt, we are anticipating some modest rises on some river stretches over the next several days. At this point we are not expecting renewed flooding, just a prolonging of high flows for this time of the year.

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

UPDATE . WDM SYNOPSIS . WDM DISCUSSION . Hoving AVIATION . CAS HYDROLOGY . Hoving MARINE . WDM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 78 mi52 min S 11 G 12 35°F 33°F1007.1 hPa35°F
MKGM4 - Muskegon, MI 90 mi42 min SE 5.1 G 6 34°F 1009.3 hPa34°F
SBLM4 - Saginaw Bay Light #1, MI 91 mi82 min SSE 1.9 G 2.9 36°F 1008.5 hPa (-0.6)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI8 mi29 minSSW 50.25 miFog35°F33°F93%1009 hPa
Charlotte, Fitch H Beach Airport, MI13 mi26 minS 30.50 miFog35°F33°F96%1007.8 hPa
Mason, Mason Jewett Field Airport, MI21 mi27 minN 00.50 miFog34°F33°F97%1008.1 hPa
Ionia County Airport, MI21 mi27 minN 00.25 miFog33°F32°F97%1007.8 hPa

Link to 5 minute data for KLAN

Wind History from LAN (wind in knots)
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Last 24hrE8E8E8E9E7E8E11E9E9E6E9E9E9E7E6E8E7E4SE7SE6SE7SE5S3SW5
1 day agoS7S7S6S6S7S6SE4S7S8SE5SE6SE4S7S4CalmSE4SE7SE9SE7E8E6SE7SE8SE9
2 days agoSW10S9SW8SW8S11S9S13
G19
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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 (2,6,7,8)
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Ground Weather Radar Station Detroit, 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 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.