Saturday, July4, 2020
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Marine Weather and Tides
Spring Green, WI

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 5:22AMSunset 8:42PM Saturday July 4, 2020 1:24 PM CDT (18:24 UTC) Moonrise 7:38PMMoonset 3:43AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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 041735 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 1235 PM CDT Sat Jul 4 2020

UPDATE. A few showers and weak thunderstorms just to the west of the CWA look likely to remain to the west with a slight chance for some weak thunderstorms this afternoon for the northern parts of the CWA where we are seeing the cumulus clouds.

AVIATION(18Z TAFS). Mostly clear skies this afternoon will continue for much of the TAF period. Some scattered cumulus clouds to the north may signal some potential for a few weak storms and showers but at this point most of the area is expected to remain dry. Overnight we expect dry conditions with no TAF concerns. By Sunday afternoon we could see potential for a few pop-up thunderstorms that will mostly be weak and would mostly impact the eastern parts of the state. Otherwise expect mostly light east/northeast winds.

PREV DISCUSSION. (Issued 948 AM CDT Sat Jul 4 2020)

UPDATE . No changes to the forecast as another warm day is expected.

MARINE . Light and variable winds will continue across Lake Michigan through the weekend as weak high pressure of 30.1 inches remains over the area. Waves will remain on the low end through this period. Southerly winds will increase some Monday into Tuesday as the high shifts slightly eastward.

PREV DISCUSSION . (Issued 649 AM CDT Sat Jul 4 2020)

UPDATE .

A lone thunderstorm has popped up this morning in Iowa County likely owing to better warmth and surface moisture there early this morning. Its been a slow mover, dumping over an inch of rain on Mineral Point and surrounding areas. This thunderstorm will continue to slowly meander westward and dissipate over the next hour or so.

Otherwise, forecast details from the previous discussion remain on track.

AVIATION(12Z TAFS) .

Areas of fog will dissipate quickly as daytime heating starts this morning. Otherwise, VFR cigs and vis can be expected throughout the TAF period. A few isolated showers/t-storms may pop up over central WI today, but most of southern WI will stay dry. If and where these storms occur, briefs drops to MFVR conditions will be possible.

PREV DISCUSSION . (Issued 354 AM CDT Sat Jul 4 2020)

SHORT TERM .

Today through Tomorrow . Forecast Confidence is moderate .

Today will be sunny and warm as high pressure will continue to linger over the Great Lakes Region. Highs will approach 90 across the area and daytime mixing will allow dewpoints to to stay in the low 60s.

There is the possibility of an isolated t-storm or two during the afternoon hours for areas in central WI as soundings show the convective temperature being met over this area, and CAMs depict specklings of precipitation. If a pop-up storm manages to form, it should be high-based and relatively short-lived. Chances for an isolated t-storm over central WI will diminish as the sun sets Saturday night. Otherwise, the rest of the area should remain dry.

Into Sunday, skies will remain clear and winds calm. Sunday should be almost a carbon copy of Saturday.

LONG TERM .

Sunday night through Friday . Forecast confidence is medium:

The upper level ridge will flatten out just a bit next week, allowing shortwaves to bring occasional thunderstorm chances to southern Wisconsin. Have at least a slight chance for storms each day as a result. The airmass will remain largely the same through the week, with very warm and sticky conditions each day. Max heat indices will range from 90-100 through the week, a fairly long stretch of uncomfortable conditions.

AVIATION(09Z TAF UPDATE) .

Isolated patchy fog is possible throughout the early morning hours in low- lying areas which may drop vis as low as 1 to 3SM spots, otherwise VFR conditions will persist through the daytime part of the TAF period. A few isolated t-storms may form over central WI during the afternoon. If they do form, they will likely by high- based and short- lived.

MARINE .

Areas of patchy fog will be possible through the early morning hours over the northern end of the lake as high dewpoints and calm winds persist. Otherwise, high pressure will continue to drive light and variable winds and low waves through the weekend.

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

Update . ARK Today/Tonight and Aviation/Marine . ARK Sunday THROUGH Friday . DDV


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lone Rock Tri-County Regional Airport, WI11 mi89 minVar 410.00 miFair86°F68°F55%1017.3 hPa
Iowa County Airport, WI21 mi30 minN 010.00 miFair86°F62°F46%1019 hPa

Link to 5 minute data for KLNR

Wind History from LNR (wind in knots)
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Last 24hrE53SW5NW3CalmCalmCalmN5NE4E6CalmCalmCalmCalmCalmCalmCalmCalmCalmE63E44E4
1 day agoCalm34N3CalmN3N3CalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmW3SW43SW4CalmNW5
2 days agoE7E9E10E8E6SE5CalmE3E3CalmCalmCalmCalmCalmE3CalmCalmCalmE33E4E4E6E3

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Milwaukee/Sullivan, WI (14,3,4,5)
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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 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.