Sunday, December15, 2019
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Marine Weather and Tides
Lake Geneva, 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 7:14AMSunset 4:23PM Sunday December 15, 2019 1:35 AM CST (07:35 UTC) Moonrise 9:05PMMoonset 11:21AM Illumination 87% Phase: Waning Gibbous; Moon at 18 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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LMZ646 Wind Point Wi To Winthrop Harbor Il- 107 Am Cst Sun Dec 15 2019
Rest of tonight..Northwest wind 15 to 20 knots. Cloudy. Waves 1 to 2 feet.
Sunday..Northwest wind 10 to 15 knots with gusts to around 20 knots backing west late in the morning, then easing to 5 to 10 knots early in the afternoon becoming west 5 to 10 knots late in the afternoon. Mostly Sunny. Waves around 1 foot.
Sunday night..West wind 5 to 10 knots veering northwest early in the morning. Slight chance of snow after midnight. Waves around 1 foot.
Monday..North wind 5 to 10 knots rising to 10 to 15 knots in the afternoon. Slight chance of snow through the day. Slight chance of rain in the afternoon. Waves around 1 foot. Wave heights are for ice free areas.
LMZ646 Expires:201912151000;;808314 FZUS53 KMKX 150707 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 107 AM CST Sun Dec 15 2019 For waters within five nautical miles of shore on Lake Michigan LMZ646-151000-


7 Day Forecast for Marine Location Near Lake Geneva, WI
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location: 42.58, -88.43     debug


Area Discussion for - Milwaukee/Sullivan, WI
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FXUS63 KMKX 150448 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 1048 PM CST Sat Dec 14 2019

UPDATE.

Cloud cover is still holding strong over much of the area, though clearing is slowly taking place from the northwest. Expect this trend to continue through the night.

AVIATION(06Z TAFS).

MVFR ceilings are taking their time clearing the area late this evening. Expect a slow clearing trend from the northwest overnight. There is still quite a bit of uncertainty as to the exact time of the clearing, so further amendments are possible. Winds will remain breezy from the northwest, but will slowly diminish toward morning.

Light winds and mostly clear skies are then expected for the day on Sunday.

PREV DISCUSSION. (Issued 846 PM CST Sat Dec 14 2019)

UPDATE .

Clouds are starting to scatter out from the northwest. This will likely be a slowly but fairly steady process through much of the night, with partly to mostly clear skies for most areas by morning.

MARINE .

Breezy northwest winds will continue across the lake this evening into tonight, with speeds over the open waters in the 25-30 knot range. Across the nearshore, winds may briefly reach small craft levels, but generally will remain just below.

High pressure will build into the area tomorrow, with lighter winds expected. Relatively light westerly flow will persist into Tuesday, when a passing front will bring a return of stronger northwest flow. Winds may briefly reach gale force later Tuesday over the far southeastern portions of the lake, but for now, it looks like wind speeds will generally remain just below gales.

PREV DISCUSSION . (Issued 519 PM CST Sat Dec 14 2019)

AVIATION(00Z TAFS) .

MVFR ceilings are expected for most of the evening, before ceilings lift and scatter out late tonight. There is still some uncertainty as to when this will take place, but a few hours on either side of midnight seems most likely at this time. Conditions should generally be dry, though a stray flurry or two isn't out of the question. Some patchy light fog or haze will also be possible.

Winds will remain breezy from the northwest this evening, with speeds slowly diminishing later tonight.

VFR conditions are light winds are expected for Sunday.

PREV DISCUSSION . (Issued 304 PM CST Sat Dec 14 2019)

SHORT TERM .

Tonight and Sunday . Forecast confidence is high.

High pressure builds into the region tonight. Cold northwest winds will push temps down into the single digits northwest of Madison tonight and teens across the southeast. The low level clouds should also begin to clear from northwest to southeast later tonight.

The high will maintain influence over southern Wisconsin on Sunday as snow spreads across central Illinois. Other than some mid and high level clouds pushing through, we will be dry and cold.

LONG TERM .

Sunday Night through Tuesday . Forecast Confidence is Moderate/High .

Generally the system expected to track from the Central Plains and toward the Ohio Valley has shifted more to the south further limiting the potential for snow across the southern parts of the CWA Sunday night into Monday. At this point the high pressure appears strong enough with dryness in the lowest levels to inhibit snow from reaching the ground despite sufficient forcing aloft. Some flurries cannot be ruled out but the CWA looks very likely to remain dry.

Tuesday Night through Saturday . Forecast Confidence is Low/Medium .

This period continues to look fairly quiet at the moment with an upper level ridge dominating the region early on. However, models are indicating potential for an upper level low to move through the region late next week, which will give us potential for a system to roll through the area. Though models remain mostly dry this is likely due to the dominance of dry air, especially near the surface. So we will be watching for the potential for a system toward the end of next week.

Otherwise Tuesday night looks to be fairly chilly with cooler temperatures brought in from Canada by the passage of Monday's system. However, temperatures the rest of the period look to be more mild for this time of year.

MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . None.

Update . Boxell Tonight/Sunday and Aviation/Marine . Boxell Sunday Night through Saturday . 99


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KNSW3 - Kenosha, WI 33 mi36 min WNW 13 G 20 21°F 1012.5 hPa (+1.3)

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burlington Municipal Airport, WI10 mi41 minWNW 12 G 1710.00 miOvercast20°F13°F76%1012.5 hPa

Link to 5 minute data for KBUU

Wind History from BUU (wind in knots)
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Last 24hrCalmCalmCalmCalmN5NW7NW8NW9NW8NW10NW12
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1 day agoCalmCalmSW3CalmCalmCalmCalmCalmN4CalmCalmCalmCalmSW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmSE6SE8SE9S5S8S10
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S10SW8SW12S8SW10S8SW6CalmCalm

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
Wind Forecast for Milwaukee/Sullivan, WI (2,6,7,8)
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Ground Weather Radar Station Milwaukee, WI
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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 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.