Thursday, December5, 2019
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Marine Weather and Tides
Sheboygan, WI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:07AMSunset 4:15PM Thursday December 5, 2019 4:01 PM CST (22:01 UTC) Moonrise 2:18PMMoonset 1:08AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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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LMZ669 Expires:201912060430;;906106 Fzus63 Kmkx 052112 Glflm Open Lake Forecast For Lake Michigan National Weather Service Milwaukee/sullivan Wi 312 Pm Cst Thu Dec 5 2019 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.. Low pressure of 29.9 inches will slide across central lake michigan tonight. Gusty north to northwest winds will develop late tonight into Friday. High pressure of 30.4 inches will move into the great lakes Friday afternoon and night, resulting in decreasing winds. Low pressure around 29.6 inches approaching from the northern plains will bring a round of gusty southerly winds Saturday into Sunday as the low passes by just to the north of lake michigan. Gale force gusts will be possible Sunday, particularly across the northern half of the lake. Gusty northerly winds will develop in the wake of the system later Monday into Tuesday, possibly approaching gale force. A much colder airmass spreading into the region next week will lead to freezing spray conditions. && lmz080-669-671-673-675-777-779-870-872-874-876-878-060430- 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- 312 pm cst Thu dec 5 2019 sheboygan wi to pentwater mi south...
Tonight..South winds 10 to 20 kt becoming southwest late this evening, then becoming west to 30 kt after midnight becoming north late. Waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft.
Friday..North winds to 30 kt diminishing to 10 to 20 kt. Waves 6 to 9 ft occasionally to 12 ft.
Friday night..North winds 10 to 15 kt backing to southwest 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
Saturday..Southwest winds 10 to 20 kt becoming south 15 to 25 kt. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
Saturday night..South winds to 30 kt increasing to gales to 35 kt. Waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to 13 ft.
Sunday..Southwest gales to 35 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft occasionally to 12 ft.
Sunday night..Southwest winds 15 to 25 kt diminishing to 10 to 20 kt. Rain likely. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
Monday..Northwest winds 10 to 20 kt becoming north 15 to 25 kt. Rain likely. Waves 4 to 6 ft occasionally to 8 ft.
Tuesday..Northwest winds to 30 kt becoming west. Chance of snow. Waves 5 to 8 ft occasionally to 10 ft.
LMZ669


7 Day Forecast for Marine Location Near Sheboygan, WI
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location: 43.71, -87.19     debug


Area Discussion for - Milwaukee/Sullivan, WI
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FXUS63 KMKX 052137 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 337 PM CST Thu Dec 5 2019

SHORT TERM.

Tonight through Friday night . Forecast Confidence is High:

Low pressure will pass through the forecast area this evening into early tonight, dragging a cold front across southern Wisconsin. Dry weather will continue as this system moves through, with the better moisture/forcing remaining north of the low. Clouds will clear out later tonight behind the front as high pressure begins to move in from the west.

Mostly sunny skies are likely Friday with high pressure overhead. Temps will be colder tomorrow behind the cold front, though the sunshine should help temps up to around normal values for early December.

Clouds will increase Friday night as the high departs, but otherwise quiet weather and near normal temps will continue.

LONG TERM.

Saturday . Forecast Confidence High:

Quiet weather continues into the weekend as a mid-level ridge remains across the upper Great Lakes region and a surface high shifts eastward on Saturday. As surface highs kicks further east, southerly flow returns to the region and warmer temperatures are expected for Sunday with highs in the low to mid 40s.

Sunday through Thursday . Forecast Confidence Medium:

While southern Wisconsin enjoys a quiet start to the weekend, an upper-level trough begins to push across the Pacific Northwest Saturday night. As the trough progresses across the central CONUS, a surface low develops along the Colorado front range. As this system continues to traverse into the Upper Midwest, southern Wisconsin looks to be sandwiched between a right entrance of weak jet leaving the region and a left exit/diffluent of another, stronger 250mb jet Sunday night/Monday. This combined with low-level WAA, should provide enough synoptic lift to support increased precipitation chances beginning Sunday and continuing into Monday. At this time, it looks to start off as rain late Sunday and transition to snow for our northern areas and more of a snow/rain mix for our southern areas.

However, models are not in agreement on where the surface low will track. GFS/GEFS favors a more northward track over southern Wisconsin, while the ECMWF/CMC tracks the low further south across northern IL/northwest IN. Thus, depending on what solution materializes will dictate the precipitaion type across southern Wisconsin. Nonetheless, QPF totals for this event looks to be light at this time and is expected to diminish Monday night as a cold front pushes across the area.

Behind the cold front, expect frigid Arctic air to filter into Wisconsin as the upper-level trough axis pushes east by Tuesday and as surface high pressure builds across the northern Plain/Upper Midwest on Wednesday. Tuesday night looks to be our coldest night with overnight lows dipping into the single digits to around 0 degrees, while highs on Wednesday look to top off between 10-20 degrees.

AVIATION(21Z TAFS).

VFR conditions will persist through this afternoon. A wind shift to the northwest is expected this evening into early tonight as low pressure and an associated cold front move through. Winds will become gusty for a time overnight into Friday until high pressure begins to build in from the west during the day Friday. Low clouds are possible behind the front late evening into the early Friday morning hours as a colder airmass pushes in. Plenty of sunshine is then expected Friday as the high moves overhead.

MARINE.

Low pressure will slide across central Lake Michigan tonight. Gusty north to northwest winds will develop late tonight into Friday behind the low and associated cold front. Decided a Small Craft Advisory will be needed overnight tonight into Friday for the gusty winds and building waves.

Low pressure approaching from the Northern Plains will bring a round of gusty southerly winds Saturday into Sunday. Gale force gusts will be possible Saturday night into Sunday morning, with the strongest gusts likely across the northern half of the lake.

Gusty northerly winds will develop in the wake of the system later Monday into Tuesday, possibly approaching gale force. A much colder airmass spreading into the region next week will lead to freezing spray conditions.

MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . Small Craft Advisory from midnight tonight to 3 PM CST Friday for LMZ645-646.

Small Craft Advisory from midnight tonight to noon CST Friday for LMZ643-644.



Tonight/Friday and Aviation/Marine . DDV Friday Night through Thursday . Wagner


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 27 mi61 min S 11 G 12 38°F 1014 hPa (-1.7)
PWAW3 - Port Washington, WI 42 mi81 min S 7 G 8.9 39°F 1014.9 hPa
BSBM4 - Big Sable Point, MI 43 mi81 min SE 6 G 8 35°F 1015.2 hPa
LDTM4 - 9087023 - Ludington, MI 43 mi49 min ESE 5.1 G 6 35°F 25°F

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sheboygan County Memorial Airport, WI35 mi68 minS 610.00 miOvercast37°F28°F73%1013.9 hPa

Link to 5 minute data for KSBM

Wind History from SBM (wind in knots)
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Last 24hrW8W5W7W9W10W11
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1 day agoW8W9W11W13W9W11W10W12W12
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2 days agoW6CalmW7W3CalmSW5CalmCalmSW4SW3S6SW5S6S6SW8S8SW9SW10SW10W8SW8W10W8W11

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 Milwaukee/Sullivan, WI (17,4,5,8)
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Ground Weather Radar Station Green Bay, WI
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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 numerious 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.