Friday, August14, 2020
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Marine Weather and Tides
Two Rivers, 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 5:52AMSunset 7:57PM Friday August 14, 2020 11:33 AM CDT (16:33 UTC) Moonrise 1:04AMMoonset 4:50PM Illumination 18% Phase: Waning Crescent; Moon at 25 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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LMZ543 Expires:202008142230;;441395 Fzus53 Kgrb 141502 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 1002 Am Cdt Fri Aug 14 2020 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz521-522-541>543-142230- Green Bay South Of Line From Cedar River To Rock Island Passage And North Of A Line From Oconto Wi To Little Sturgeon Bay Wi- Green Bay South Of Line From Oconto Wi To Little Sturgeon Bay Wi- Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 1002 Am Cdt Fri Aug 14 2020
This afternoon..E wind 5 to 10 kts. Waves 2 ft or less. Sunny.
Tonight..SE wind 5 to 10 kts veering S 10 to 15 kts after midnight. Waves 2 ft or less. Partly cloudy.
Saturday..SW wind 10 to 15 kts veering nw by midday. Waves 1 to 3 ft. A chance of showers and Thunderstorms through early afternoon.
Saturday night..N wind 5 to 10 kts backing W after midnight. Waves 2 ft or less. Mostly clear.
LMZ543


7 Day Forecast for Marine Location Near Two Rivers, WI
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location: 44.15, -87.56     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 141137 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 637 AM CDT Fri Aug 14 2020

Updated aviation portion for 12Z TAF issuance

SHORT TERM. Today . Tonight . and Saturday Issued at 338 AM CDT Fri Aug 14 2020

A quiet night is in progress over northeast WI, with high pressure at the surface and upper ridging aloft. Under partly cloudy skies, temperatures ranged from the upper 50s to middle 60s. A weakening line of thunderstorms was moving through northeast MN, and nearing the Duluth vicinity.

Meso-models suggest that the line of thunderstorms will continue to weaken as it moves into northwest WI, and should fall apart before reaching north central WI. Some debris clouds will likely impact the northwest part of the area early, followed by plenty of sunshine. High temperatures should warm into the 80s, except middle to upper 70s near Lake Michigan due to southeast winds.

Thunderstorms will redevelop over MN this afternoon, in association with an unstable air mass and approaching cold front. The storms will move through western WI this evening, then reach north central and central WI toward midnight. Models suggest that the convection will be weakening as it arrives in GRB CWA, so the main severe threat should remain to our west. The cold front will move through north central and central WI overnight, and bring a chance of storms to areas west of the Fox Valley and bayshore/ lakeshore by morning. Lows will drop into the upper 50s far west, and lower to middle 60s over the rest of the region.

The cold front will shift through eastern WI Saturday morning, and reach the lakeshore by midday. The quicker frontal passage will lower the risk of severe weather, as the atmosphere will not have much time to destabilize. SPC has shifted the Marginal Risk of severe storms to our east, and this looks good. Have adjusted pops to focus most of the precipitation chances during the morning, with only a small chance lingering over the far east into the early afternoon. Temperatures will be a little cooler, ranging from the lower to middle 70s northwest to the upper 70s to around 80 east. Northwest winds will gust to around 20 mph in the wake of the frontal passage.

LONG TERM. Saturday Night Through Thursday Issued at 338 AM CDT Fri Aug 14 2020

The long term forecast features a few chances of precip to contend with as northwest flow will dominate the western Great Lakes from Saturday night through the middle of next week. Upper pattern starts to flatten toward the end of next week. Temps will start off near/above normal on Sunday, then fall below normal for the start of the week, then return to near/above normal late in the week.

Saturday night into Sunday . with the faster frontal passage expected, all of the shower/storm activity associated with the front should be east of the area by 00z Sunday. A secondary shortwave, jet max, and weak surface boundary will drop into northern WI late Saturday into Sunday morning, bringing chances for mainly showers, especially across northern WI. Increased POPs and cloud cover during this period. Bumped up low temps slightly do to the expected cloud cover spreading into the area. Weak cold air advection, showers/clouds could hold temps down across portions of the area (especially north), but 850mb temps of 12-13C support highs in the upper 70s to around 80. Northwest winds are expected to gust up to around 25 mph as well.

Rest of the extended . surface high pressure builds into the western Great Lakes bringing mainly dry weather to the area Sunday night into Tuesday. Aloft, a couple weak shortwaves will ride through the northwest flow, which could bring some extra cloud cover and possibly even some precip chances. This is especially the case on Tuesday night into Wednesday, as models trending toward bringing a more potent shortwave and surface boundary across the area. A model blend only brings some slight chance POPs across northern WI, but chances may have to be increased and expanded. Surface high pressure expands across the area on Thursday, along with weak ridging aloft, bringing dry weather. Then as the pattern flattens and becomes more zonal, a fast moving shortwave, low pressure system and cold front will bring shower/storm chances toward the end of the week.

AVIATION. for 12Z TAF Issuance Issued at 631 AM CDT Fri Aug 14 2020

Patchy fog will mix out early this morning, followed by VFR conditions until later tonight. South winds will gust to 15-17 knots across north central and central WI this afternoon. A cold front will bring a chance of showers and thunderstorms to north central and central WI after midnight tonight, so have added a mention of thunderstorms at the western TAF sites. There is a chance of LLWS over far north central WI ahead of the cold front tonight, but confidence is too low to add to the RHI TAF site at this time.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Kieckbusch LONG TERM . Bersch AVIATION . Kieckbusch


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 29 mi34 min NE 4.1 G 4.1 68°F
45014 46 mi64 min NE 5.8 G 5.8 74°F 1016.7 hPa

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manitowoc, Manitowoc County Airport, WI6 mi38 minSE 510.00 miFair77°F70°F79%1018.2 hPa

Link to 5 minute data for KMTW

Wind History from MTW (wind in knots)
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Last 24hrSE7SE7SE5SE7SE6SE6--CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW3CalmN3N3E4--SE5
1 day agoE7E9SE74------S5SW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--N3N3E4SE6
2 days agoW7W8W84W8SW7SW6SW5SW3CalmSW4CalmCalmSW4CalmW3CalmSW3--CalmCalmNW3NW3SE5

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 Green Bay, WI (12,3,4,5)
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Ground Weather Radar Station Green Bay, 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.