Tuesday, January19, 2021
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Marine Weather and Tides
Bridgman, MI

Version 3.4
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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 7:08AMSunset 4:48PM Tuesday January 19, 2021 11:44 AM CST (17:44 UTC) Moonrise 11:52AMMoonset 12:00AM Illumination 38% 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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LMZ080 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 844 Am Cst Tue Jan 19 2021 Sheboygan Wi To Pentwater Mi South...
.gale watch in effect from Wednesday afternoon through Wednesday evening...
Rest of today..West winds 10 to 20 kt. Slight chance of snow through mid morning, then chance of snow this afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
Tonight..Northwest winds 15 to 25 kt diminishing to 10 to 20 kt. Chance of snow in the evening, then slight chance of snow overnight. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
Wednesday..West winds 10 to 20 kt becoming southwest late in the morning, then increasing to 30 kt early in the afternoon increasing to gales to 40 kt late. Waves 4 to 6 ft occasionally to 8 ft building to 8 to 11 ft occasionally to 14 ft.
Wednesday night..Southwest gales to 40 kt becoming west gales to 35 kt. Waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft occasionally to 16 ft.
Thursday..West winds to 30 kt. Waves 5 to 8 ft occasionally to 10 ft.
Thursday night..West winds to 30 kt becoming northwest 15 to 25 kt. Waves 5 to 8 ft occasionally to 10 ft.
Friday..Northwest winds 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
Saturday..Northwest winds 5 to 10 kt becoming west 10 to 15 kt. Waves 1 to 3 ft.
LMZ080 Expires:202101192215;;162743 FZUS63 KMKX 191444 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 844 AM CST Tue Jan 19 2021 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS... Northwesterly winds persist today as low pressure around 29.9 inches continues to push east across the northern Great Lakes and as high pressure builds to the south of Lake Michigan. There will also be a weakening surface wave moving across the Upper Mississippi River Valley today as well. Then another low around 29.1 inches is expected to cross Manitoba and Ontario Wednesday and Thursday. Gusty southwest winds look to develop ahead of the system, with gales looking increasingly likely for Wednesday afternoon and night. Thus, a Gale Watch remains in effect for this time. Then a cold front pushes across the Lake and gusty west to northwest winds, generally remaining below gales, will develop Wednesday night and continue through Friday. && LMZ080-669-671-673-675-777-779-870-872-874-876-878-192215-


7 Day Forecast for Marine Location Near Bridgman, MI
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location: 42.05, -86.84     debug


Area Discussion for - Northern Indiana, IN
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FXUS63 KIWX 191715 AFDIWX

Area Forecast Discussion National Weather Service Northern Indiana 1215 PM EST Tue Jan 19 2021

SYNOPSIS. Issued at 310 AM EST Tue Jan 19 2021

A quick round of snow will move through beginning this afternoon in northwest Indiana, spreading eastward through the evening. The greatest snow totals are expected in southwest Michigan as some lake enhanced snow develops. Snow will exit overnight.

SHORT TERM. (Today and Tonight) Issued at 310 AM EST Tue Jan 19 2021

Another quick round of snow will move through with the greatest totals expected in Berrien and Cass (MI) counties. Snow will begin near the afternoon drive time and taper off late Tuesday night (west to east). Totals of 2-4" are expected in the aformentioned counties, with, broadly speaking, 1-2" of snow along U.S. 20 but west of I-69. Elsewhere, 1 inch or less is expected. The nitty-gritty details follow:

There are two features to monitor over the next 24 hours. The first is a weak surface low and fading vort max aloft that has spawned an area of light snow near La Crosse, WI early this morning. This feature will weaken as it moves east. However, I cannot completely rule out some of these snow showers surviving into our northwest CWA late this afternoon. Any radar returns will likely work to saturate our currently-dry airmass.

The main show is a robust wave quickly dropping through the Dakotas. It has a fairly impressive representation on Infrared Satellite, with cloud tops of -40C. This afternoon and evening, the left exit region of an 80 knot jet at 500mb will move through our CWA. This jet will intensify this evening toward 90+ knots, indicating a dynamic clipper. Cross sections confirm this by showing frontogenesis at both 700mb and in a layer from 500-300mb. While much of these f-gen areas reside outside of the DGZ, a reduced gradient in theta-e is noted within the DGZ indicative of some instability there, and there is favorable omega within the DGZ. Lastly, saturation is noted in the lowest 700mb and steep lapse rates at times.

In coordination with Grand Rapids, we opted to hoist an advisory to highlight: 1) the impacts to the afternoon/evening commute, and 2) the snow's intensity. We are cognizant that recent short waves have not performed as well as we expected, but the upper-level support is improved in this scenario, among the other factors noted above.

LONG TERM. (Wednesday through Monday) Issued at 310 AM EST Tue Jan 19 2021

Any lingering lake effect snow toward southwest Michigan will ease Wednesday morning as ridging move in. Zonal flow follows by nightfall which keep conditions mostly quiet through the end of the week. I cannot rule out another round of lake effect snow Thursday night into Friday thanks to a reinforcing shot of cold air down the lake and surface high pressure moving in over the western Great Lakes.

The upper-air pattern amplifies by the weekend with a trough in the west and a ridge over the east. A cut off low near the Baja really throws a wrench into how this upper-air pattern will evolve. A second wrench is a wobbling upper-level low over the Canadian Prairies. These features will be critical in steering any potential storms tracking through the Central US.

AVIATION. (For the 18Z TAFS through 18Z Wednesday Afternoon) Issued at 1215 PM EST Tue Jan 19 2021

Clipper system dropping down into the mid-MS valley this afternoon will spread primarily light snow into the area that will impact both terminals this evening into tonight. Surface reflection will weaken as it moves into our area but still has decent mid-level support. Expecting mainly MVFR conditions with possible burst/banding of moderate snow dropping KSBN down to IFR vsbys briefly. Snow will quickly exit east of the area after midnight . west/northwest flow in the wake of this system will keep MVFR cigs through early Wednesday morning before finally clearing to VFR by the end of the period.

IWX WATCHES/WARNINGS/ADVISORIES. IN . NONE. MI . Winter Weather Advisory from 3 PM this afternoon to 4 AM EST Wednesday for MIZ077-078.

OH . NONE. LM . Small Craft Advisory until 11 AM EST Wednesday for LMZ043-046.



SYNOPSIS . Brown SHORT TERM . Brown LONG TERM . Brown AVIATION . JAL

Visit us at www.weather.gov/iwx

Follow us on Facebook . Twitter . and YouTube at: www.facebook.com/NWSNorthernIndiana www.twitter.com/nwsiwx www.youtube.com/NWSNorthernIndiana


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SJOM4 - St. Joseph, MI 19 mi45 min WSW 14 G 20 31°F 1021.3 hPa (+1.0)
MCYI3 - Michigan City, IN 23 mi45 min SW 12 G 15 26°F 17°F
BHRI3 - Burns Harbor, IN 32 mi65 min SW 5.1 G 6 27°F 1022.7 hPa
SVNM4 - South Haven, MI 38 mi45 min 17 G 19 30°F
CHII2 - Chicago, IL 40 mi45 min W 14 G 16 26°F 19°F
CMTI2 - 9087044 - Calumet, IL 43 mi57 min SW 7 G 12 26°F 1021.5 hPa18°F
CNII2 43 mi30 min SSW 7 G 12 26°F 17°F
FSTI2 43 mi105 min 27°F
OKSI2 43 mi105 min WNW 4.1 G 9.9 28°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Michigan Regional Airport, MI22 mi52 minW 13 G 2110.00 miOvercast30°F22°F72%1021.8 hPa
Michigan City Municipal Airport, IN24 mi50 minSW 710.00 miOvercast27°F18°F69%1022 hPa

Link to 5 minute data for KBEH

Wind History from BEH (wind in knots)
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1 day agoSW8SW11W11SW11SW9SW8W7NW3N45CalmCalmS4NW10W10W8W9NW9W9
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2 days agoS63S6CalmW54NW11
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NW7NW8NW6NW8W7W8W10W6NW5NW5NW5NW4SW4SW9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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.
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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.