Saturday, July11, 2020
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Marine Weather and Tides
Beechwood, 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 6:15AMSunset 9:24PM Saturday July 11, 2020 11:52 PM EDT (03:52 UTC) Moonrise 12:00AMMoonset 11:44AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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 Edt Sat Jul 11 2020
.small craft advisory in effect from Sunday afternoon through late Sunday night...
Rest of tonight..North winds around 5 knots veering northeast 5 to 15 knots after midnight. Partly cloudy. Waves 1 foot or less.
Sunday..North winds 10 to 15 knots increasing to 15 to 25 knots. Mostly Sunny. Waves around 1 foot building to 4 to 6 feet.
Sunday night..North winds 15 to 25 knots decreasing to 10 to 15 knots after midnight. Mostly clear. Waves 4 to 6 feet subsiding to 2 to 3 feet after midnight.
Monday..North winds around 10 knots backing northwest. Sunny. Waves 1 to 2 feet.
Monday night..Northwest winds 5 to 15 knots veering east toward daybreak. Mostly clear. Waves around 1 foot.
Tuesday..South winds 10 to 15 knots. Mostly Sunny. Waves 1 foot or less.
Wednesday..Southwest winds 10 to 15 knots. Partly Sunny with a chance of showers and Thunderstorms. Waves 2 to 3 feet.
Thursday..Northeast winds around 10 knots backing northwest. Mostly Sunny. Waves 1 foot or less.
LMZ846 Expires:202007120900;;707398 FZUS53 KGRR 120206 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 1005 PM EDT Sat Jul 11 2020 For waters within five nautical miles of shore on Lake Michigan LMZ846-120900-


7 Day Forecast for Marine Location Near Beechwood, MI
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location: 42.77, -86.21     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 112328 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 728 PM EDT Sat Jul 11 2020

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 330 PM EDT Sat Jul 11 2020

- Upper disturbance brushes Southern Great Lakes tonight/Sunday with some rain showers

- Dry from Sunday afternoon into Tuesday night

- Showers and thunderstorms from Wednesday into Thursday

DISCUSSION. (This evening through next Saturday) Issued at 330 PM EDT Sat Jul 11 2020

-- Upper disturbance brushes Southern Great Lakes tonight/Sunday with some rain showers --

An upper shortwave can be seen dropping southeast towards our area from Minnesota this afternoon. Showers and thunderstorms are currently associated with the shortwave. Models are fairly consistent in showing the bulk of the precipitation missing our area to the south. We have very small chances (20/30 pct) for a shower or storm overnight and into Sunday along and south of I-94.

-- Dry from Sunday afternoon into Tuesday night --

A period of dry weather settles back into the area for Sunday through Tuesday night. High pressure will be in place the bulk of the time with a lack of deep moisture.

-- Showers and Thunderstorms from Wednesday into Thursday --

Our next better chance for precipitation will come mid next week as a cold front is forecast to move through the region. A round of showers and thunderstorm will likely accompany the frontal passage. 850mb LIs drop to -3C or so, therefore thunderstorms are in the forecast. PWAT values in the GFS rise to around 2 inches which will be high enough for locally heavy rain. The GFS and ECWMF ensembles show 0.50 to 1.00 inch looks very plausible.

Beyond Thursday there are model disparities. The GFS shows a bit more in the way of a trough lingering into the end of the week, whereas the ECMWF is more zonal. Our model blend is hanging on to small pops through the end of the week and into Saturday, but given the time of year the drier more zonal look of the ECMWF is probably more likely.

Temperatures to start the work week will be very comfortable and near normal. Heat and humidity will build into midweek ahead of the cold front. We should see 80s for highs all of this week.

AVIATION. (For the 00Z TAFS through 00Z Sunday evening) Issued at 728 PM EDT Sat Jul 11 2020

VFR conditions will prevail through Sunday afternoon. Northwest winds 5 to 10 knots with some gusts over 20 knots on Sunday afternoon.

MARINE. Issued at 330 PM EDT Sat Jul 11 2020

Northwest flow will weaken this evening as low pressure moves off to the east. Waves of around 2 feet will be possible this evening. Focus shifts to a north flow wind and wave event on Sunday.

The setup for Sunday is one of our typical summer wave event regimes. It involves an advancing high pressure area out of the Plains States that channels/funnels a north wind down the length of the lake especially along our shoreline. North winds over 20 knots are expected on Sunday which should push waves into the 3 to 6 foot range. The highest waves will be found south of Holland during the evening.

A Small Craft Advisory and Beach Hazards Statement have been issued for our entire lakeshore. The headlines begin up near Big and Little Sable Point at 800am Sunday and from Whitehall to the south at noon. The headlines end up north 11pm and in the south at 400am.

The juxtaposition of fairly good weather, waves of the height that produce the most drownings (3-6ft) and a Jul/Aug weekend make Sunday a concern. Folks are urged to stay dry when waves are high and steer clear of the pier! North sides of north piers will be dangerous places to swim.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Beach Hazards Statement from Sunday afternoon through late Sunday night for MIZ050-056-064-071.

Beach Hazards Statement from Sunday morning through Sunday evening for MIZ037-043.

LM . Small Craft Advisory from 8 AM Sunday to midnight EDT Sunday night for LMZ848-849.

Small Craft Advisory from noon Sunday to 4 AM EDT Monday for LMZ844>847.



SYNOPSIS . Duke DISCUSSION . Duke AVIATION . Ostuno MARINE . Duke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 0 mi59 min S 5.1 G 5.1 72°F 58°F1009.3 hPa70°F
45029 10 mi23 min S 1.9 G 3.9 73°F 71°F1 ft1009 hPa70°F
SVNM4 - South Haven, MI 26 mi53 min S 5.1 G 5.1 75°F
45168 27 mi23 min SSW 5.8 G 7.8 76°F 78°F1 ft1009 hPa67°F
MKGM4 - Muskegon, MI 32 mi43 min SW 4.1 G 4.1 72°F 1009.1 hPa70°F
SJOM4 - St. Joseph, MI 49 mi53 min Calm G 1.9 74°F 1010.8 hPa (+0.3)

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
Holland - West Michigan Regional Airport, MI6 mi60 minSW 310.00 miFair70°F64°F84%1009.4 hPa

Link to 5 minute data for KBIV

Wind History from BIV (wind in knots)
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Last 24hrNW3CalmCalmCalmCalmCalmCalmCalmW3W56W7W6
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W10NW9W9W6W6W3CalmSW3
1 day agoE7SE7SE6N9S6SE7SE9SE7S8S5SW4W5W11
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2 days agoE3CalmCalmCalmCalmSE3SE3S4CalmSE3S54SW9W65W11W8W6W6E5E8E6E5E8

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 (23,6,7,8)
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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.