Thursday, January23, 2020
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Marine Weather and Tides
Marinette, 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 7:18AMSunset 4:49PM Thursday January 23, 2020 10:15 AM CST (16:15 UTC) Moonrise 7:38AMMoonset 4:33PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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LMZ521 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- 948 Am Cst Thu Jan 23 2020
Rest of today..E wind 5 to 10 kts. Waves 2 ft or less. Light snow.
Tonight..E wind 5 to 10 kts. Waves 2 ft or less. Light snow.
Friday..NE wind 10 to 15 kts. Waves 2 ft or less. Light snow.
Friday night..NE wind 10 to 15 kts. Waves 2 ft or less. Light snow mixed with light rain.
LMZ521 Expires:202001232330;;396811 FZUS53 KGRB 231548 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 948 AM CST Thu Jan 23 2020 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-232330-


7 Day Forecast for Marine Location Near Marinette, WI
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location: 45.09, -87.58     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 231215 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 615 AM CST Thu Jan 23 2020

Updated aviation portion for 12Z TAF issuance

SHORT TERM. Today . Tonight . and Friday Issued at 345 AM CST Thu Jan 23 2020

Jet energy moving northeast in slightly diffluent southwest upper flow will combine with weak low level warm advection to produce periods of light snow today through Friday. There could be some light freezing drizzle if mid level saturation is lost but think snow will be the dominant precipitation type. There could be a little rain mixed with the snow near Lake Michigan Friday afternoon as surface temperatures rise into the middle 30s.

An inch or two of snow is expected today, another inch tonight and an inch or so Friday. Temperatures will be mild, with highs 5 to 10 degrees above normal and lows tonight about 20 degrees above usual.

LONG TERM. Friday Night Through Wednesday Issued at 345 AM CST Thu Jan 23 2020

The main concern for the extended forecast is the continuation of the unsettled pattern through Saturday. Beyond Saturday evening, brief snow showers are possible on Monday before a midweek system could bring additional precipitation to the region. Temperatures are expected to remain above normal through the extended forecast.

Friday night through Saturday night . With the main upper-level cut-off low to the south of the region over the Ohio River Valley Friday night, the surface low pressure system will make a turn tracking north/northeast over Lake Michigan and Lower Michigan. Model guidance has been more consistent with the surface low taking this track Friday night. This would spread more QPF over the Fox Valley and lakeshore leading to some higher additional snowfall amounts in the 1 to 3 inch range by Saturday morning in these areas. Depending on how quickly the snow falls and if QPF amounts increase, a Winter Weather Advisory may be needed. By Saturday afternoon, the surface low will be moving over Lower Michigan, leaving chances for light snow and a mix of rain and snow across the region into Saturday evening. Additional snow accumulations by Saturday night will be minimal.

Rest of the extended . As the upper-level cut-off low shifts over the Northeastern U.S., broad upper-level ridging will build over the Upper Mississippi Valley. The ridge will flatten into Monday as the models show indications of a weak upper-level disturbance moving over the region. This disturbance could bring some light snow showers or flurries to the region Monday into Tuesday. Due to uncertainties and low confidence, kept the forecast dry during this time. The upper-level pattern then evolves into a broad split flow with a northern and southern piece of energy moving towards the region for Wednesday. The southern piece of energy appears to be the stronger of the two. While the southern piece of energy appears to remain south of the region, it is possible it could phase with the northern piece of energy on Wednesday or Thursday bringing chances for snow or a mix of rain and snow to the region. However, model guidance is not in agreement with timing or track of these pieces of energy.

AVIATION. for 12Z TAF Issuance Issued at 613 AM CST Thu Jan 23 2020

IFR conditions and light snow are expected much of the time today through Friday. Some very light freezing drizzle is possible. Snow amounts will be an inch or two today, with another inch or so tonight and Friday.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . RDM LONG TERM . Hykin AVIATION . RDM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MN4 - 9087088 - Menominee, MI 1 mi46 min E 4.1 G 5.1 30°F 35°F1018.7 hPa29°F
KWNW3 - 9087069- Kewaunee, WI 43 mi46 min Calm G 2.9 31°F 1018 hPa

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Menominee - Marinette Twin County Airport, MI3 mi20 minESE 30.50 miLight Snow Fog32°F30°F92%1020.1 hPa
Door County Cherryland Airport, WI21 mi20 minN 01.75 miUnknown Precip Fog/Mist33°F30°F89%1019.8 hPa

Link to 5 minute data for KGRB

Wind History from GRB (wind in knots)
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1 day agoSW10SW9SW9
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2 days agoW7W7NW6W8W5SW4SW4SW4SW5W4SW3W6W4W3CalmW3SW5SW4SW5SW5S5SW4SW5SW9

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 (11,2,3,4)
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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.