Tuesday, January19, 2021
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L-36.com

Marine Weather and Tides
Spring Green, WI

Version 3.4
NOTICE
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 7:22AMSunset 4:55PM Tuesday January 19, 2021 12:02 PM CST (18:02 UTC) Moonrise 11:04AMMoonset 11:53PM 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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7 Day Forecast for Marine Location Near Spring Green, WI
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location: 43.14, -90     debug


Area Discussion for - Milwaukee/Sullivan, WI
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FXUS63 KMKX 191459 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 859 AM CST Tue Jan 19 2021

UPDATE. (Issued 859 AM CST Tue Jan 19 2021)

Light snow is expected to move into the area from the west around mid day, pushing east through the afternoon. Have increased snow amounts slightly for areas southwest of Madison based on the latest hi-res guidance. There will likely be a couple of bands of heavier snow (relatively speaking) across this area, and around an inch of accumulation is expected. Elsewhere, amounts should be less than 1 inch.

Boxell

SHORT TERM. (Issued 348 AM CST Tue Jan 19 2021)

Today through Wednesday Night:

A swath of weak reflectivity extending from central WI down into central IA is pushing east early this morning. Seeing a few stations in the Dells and Lone Rock areas reporting light snow at times. So it is not out the question to see a few flakes fly through the morning further east as this swath pushes across the area.

Otherwise, the main concern today will be the mid-level shortwave trough digging across the Upper Midwest. This is bringing a weak surface low across the eastern Dakotas this morning and as it progresses southeastward into southern MN/northern IA through the morning it is expected to weaken further into a surface trough later this afternoon. Nevertheless, this clipper is progged to bring some light snow chances to portions of southern WI this afternoon and linger into the early evening. Not expecting much in the way of snowfall accumulations, but amounts should generally remain below an inch. However, use caution if traveling this afternoon as even a little bit of snow on untreated roads can cause slick road conditions.

The light snow is expected to tapper off through the evening as the wave exits the region, but stronger CAA on the backside of the system will bring in a frigid, arctic airmass this evening/tonight. Overnight temps look to fall into the single digits inland and the low teens for areas closer to the lake front while even colder wind chills around 0 degrees F are expected.

These cold conditions will not last long as southwesterly winds and a WAA regimes setups across the region on Wednesday ahead of strong low that is progged to work its way across central Canada and the northern Great Lakes Region. Looking at temps to climb back into the upper 20s to low 30s. However, it will be breezy as the pressure gradient increases across the Upper Midwest and a 40-50+ knot low level jets moves over WI. As this low, which will remain to our north, pushes east it is expected to drag a cold front across WI overnight Wednesday and bring westerly winds across WI.

Wagner

LONG TERM. (Issued 348 AM CST Tue Jan 19 2021)

Thursday through Monday:

Strong low pressure will move from Ontario to New England for Thu-Fri. Brisk wly flow on Thu will veer to nwly with the dry cold frontal passage. High temps will fall from the 30s on Thu to the upper teens and lower 20s for Fri. Polar high pressure around 1030 mb will then shift ewd across srn WI late Fri nt-Sat AM. Good radiational cooling conditions will lower temps to near zero degrees well inland. Another cold day will follow on Sat.

Much uncertainty for Sat nt-Mon due to a split jet stream flow and whether or not any phasing will occur. Overall, warm, moist advection will develop with increasing chances for light snow into Sun and possibly continuing into Mon.

Gehring

AVIATION. (Issued 859 AM CST Tue Jan 19 2021)

MVFR ceilings will return to the entire area by late morning, with light snow developing this afternoon. Janesville and Kenosha will be most affected by the snow, though light amounts are still expected at Madison, Waukesha, and Milwaukee. Ceilings and visibility should generally remain MVFR during the snow, though brief visibility drops to IFR are possible. Snow will end from west to east this evening.

Winds through the day and into tonight will be from the west, shifting to the southwest tomorrow morning.

Boxell

MARINE. (Issued 348 AM CST Tue Jan 19 2021)

Westerly winds persist today as high pressure builds to the south of Lake Michigan and a weakening surface wave tracks across southern MN/northern IA. Winds then shift to the southwest into Wednesday as a stronger low works its way across central Canada. This system will bring a 40-50+ knot low-level jet over the region and windier conditions across our waters. Still have some uncertainty with whether we could tap into the higher winds and mix them down, but it likely will be enough to bring gale conditions across the open waters of Lake Michigan Wednesday afternoon and evening. Thus, a Gale Watch remains in effect for this time. However, winds across the nearshore waters should remain below gale and will need a Small Craft Advisory. Then a cold front will push across the Lake and gusty west to northwest winds will develop Wednesday night and continue through Friday.

Wagner

MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . Gale Watch . LMZ080-LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565- LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ777-LMZ779-LMZ868- LMZ870-LMZ872-LMZ874-LMZ876-LMZ878 . 3 PM Wednesday to midnight Thursday.



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Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lone Rock Tri-County Regional Airport, WI11 mi67 minW 510.00 miOvercast27°F21°F78%1020.5 hPa
Iowa County Airport, WI21 mi68 minWSW 610.00 miPartly Cloudy28°F21°F74%1019.3 hPa

Link to 5 minute data for KLNR

Wind History from LNR (wind in knots)
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Last 24hrW10W11W10W9NW10NW9NW5W4W6W7W5W8W6W5W5W5W5W3W4W6W6W4W7W5
1 day agoNW6NW3N4W5W6W9W7W8W6W6NW7W4W7W6W6W7W8W4W4W5W6W7NW9W9
2 days agoNW7NW11NW11NW8W6W6NW9NW6NW4NW6NW4W6W5W5W4W5NW8N9N7NW5N6N4CalmW6

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