Wednesday, January29, 2020
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Marine Weather and Tides
Manitowoc, 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 7:09AMSunset 4:57PM Wednesday January 29, 2020 4:34 AM CST (10:34 UTC) Moonrise 10:49AMMoonset 10:45PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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:202001291115;;672365 Fzus53 Kgrb 290209 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 809 Pm Cst Tue Jan 28 2020 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz541>543-291115- Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 809 Pm Cst Tue Jan 28 2020
Rest of tonight..N wind 5 to 10 kts. Waves 2 ft or less. Scattered snow showers.
Wednesday..NE wind 5 to 10 kts. Waves 2 ft or less. A chance of snow showers.
Wednesday night..NE wind 5 to 10 kts backing N after midnight. Waves 2 ft or less. Cloudy.
Thursday..NW wind 5 to 10 kts backing sw early in the afternoon. Waves 2 ft or less. Mostly cloudy.
LMZ543


7 Day Forecast for Marine Location Near Manitowoc city, WI
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location: 44.09, -87.65     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 290906 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 306 AM CST Wed Jan 29 2020

Forecast discussion for routine morning forecast issuance

SHORT TERM. Today . Tonight . and Thursday Issued at 306 AM CST Wed Jan 29 2020

Flurries or light freezing drizzle will continue to plague the eastern portion of the cwa through early Thursday morning as several weak shortwaves interact with low level moisture with a boost from Lake Michigan as low level winds advect in moisture off the lake. Although delta-t values will only be 12 to 15, convergence along the lakeshore and the aforementioned shortwaves will be enough for this light precipitation to fall at times. Model soundings show moisture will be shallow and flirt with the -10 to -12 celsius zone at times, which is why both precipitation types will be on the table for much of the forecast period. Some relief is forecast later Thursday morning as the low level moisture scours out a bit, which may allow the on and off precipitation to come to an end. This will cause roadways to become ice covered and slippery at times. Will continue to hit these events with SPS statements as the freezing drizzle is not widespread enough for a formal headline at this time.

Highs today are expected to be in the middle to upper 20s. Lows tonight are expected to drop into the 10 to 15 degree range across the north, with upper teens across east-central Wisconsin. Highs on Thursday are expected to reach into the upper 20s to around 30.

LONG TERM. Thursday Night Through Tuesday Issued at 306 AM CST Wed Jan 29 2020

Mild temperatures are expected to continue through the weekend, then return to or below normal early next week. Upper trough expected to approach the area from the west Thursday night. Increasing lift ahead of the system should bring a chance of light snow or possibly freezing drizzle late. The upper trough swings across the area on Friday, bringing a chance of light snow although freezing drizzle can't be ruled out at times. The chances of light snow or freezing drizzle will continue into Friday night.

Models differ on the feature moving across the Upper Midwest late Friday night into Saturday. The ECMWF is most aggressive with the system which would bring a few inches of snow to much of the area. The GFS/NAM/Canadian were considerably less bullish on precipitation totals, thus confidence is low on the impacts of the system at this time. Dry conditions are expected Saturday night and Sunday as mild Pacific air remains in place. High temperatures in some spots may warm into the 40s. Sunday should be the warmest day, as colder air works into the northern United States on Monday. Some differences on high temperatures between the GFS and ECMWF for Monday and Tuesday. Low confidence in the forecast early next week as the GFS/Canadian are dry Monday night into Tuesday while the ECMWF would bring accumulating snow to the area.

AVIATION. for 06Z TAF Issuance Issued at 1042 PM CST Tue Jan 28 2020

MVFR ceilings are expected to linger through much of this TAF issuance as low-level moisture lingers across the area. Light lake effect snow over north-central WI may intermittently impact the RHI TAF site; however, visibility restrictions are expected to be minimal. Light northeast to easterly flow may allow for some light lake effect snow, possibly mixed with light freezing drizzle through late tonight, along the Lake Michigan shoreline. The light snow will likely linger through much of the day Wednesday. MTW would see the greatest impact with some reduced ceilings/visibilities; however, ATW and GRB could see occasional visibility reductions if lake effect snow showers make it far enough inland Wednesday.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Kurimski LONG TERM . Eckberg AVIATION . Cooley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SGNW3 - Sheboygan, WI 24 mi35 min NNW 6 G 8 25°F
KWNW3 - 9087069- Kewaunee, WI 27 mi47 min N 4.1 G 7 25°F 1021 hPa

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manitowoc, Manitowoc County Airport, WI4 mi99 minNNW 610.00 miLight Snow26°F19°F75%1022.6 hPa
Sheboygan County Memorial Airport, WI24 mi42 minWNW 510.00 miOvercast25°F17°F72%1022.4 hPa

Link to 5 minute data for KMTW

Wind History from MTW (wind in knots)
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Last 24hrW5NW5W5W7NW7N5NW5N54N8N6N6N7N5N4NW4NW3NW3NW3NW4NW4NW3N6NW6
1 day agoN4N5NW5N5NW7NW7N7N9N9NW6N8NW6NW5NW5--NW6W4NW6W4NW5NW5W6W6NW6
2 days agoNW8W7W7W8W9W8W9W9W10W7W9W8W7W7W7W5W6W7W6W4W5CalmCalmNW3

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 Green Bay, WI (5,6,7,8)
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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 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.