Thursday, February20, 2020
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Marine Weather and Tides
Suamico, 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 6:43AMSunset 5:28PM Thursday February 20, 2020 6:17 PM CST (00:17 UTC) Moonrise 6:22AMMoonset 3:28PM Illumination 8% Phase: Waning Crescent; Moon at 27 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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LMZ522 Expires:202001250515;;460231 Fzus53 Kgrb 242121 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 321 Pm Cst Fri Jan 24 2020 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz521-522-250515- 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- 321 Pm Cst Fri Jan 24 2020
Tonight..NE wind 10 to 15 kts. Patchy fog. Drizzle in the evening. Light snow. A chance of drizzle and freezing drizzle after midnight.
Saturday..N wind 10 to 15 kts. Patchy fog in the morning. A slight chance of light snow in the morning. A chance of drizzle and freezing drizzle.
Saturday night..NW wind 5 to 10 kts. A chance of drizzle and freezing drizzle.
Sunday..NW wind 5 to 10 kts. Cloudy. Waves omitted due to ice coverage. This is the last issuance of the nearshore forecast for the bay of green bay for the season. The forecast for the bay will again be issued on or around april 1, 2020.
LMZ522


7 Day Forecast for Marine Location Near Suamico village, WI
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location: 44.66, -87.95     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 202329 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 529 PM CST Thu Feb 20 2020

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Friday Issued at 226 PM CST Thu Feb 20 2020

Surface high over the Midwest will drop to the south tonight and Friday and allow milder air to move in from the High Plains.

Warm advection and a steady light breeze will make for low temperatures much higher than last night. Lows should be mostly in the single numbers above zero, but wind chills below zero will still make for a cold night.

Friday will be sunny and milder, though a moderate southwest wind will add a chill to the air. Highs should get near or a few degrees above freezing.

LONG TERM. Friday Night Through Thursday Issued at 226 PM CST Thu Feb 20 2020

Main highlights of the long term will be above normal temps through early next week and when/if a system will impact the region early next week.

Friday night through Sunday . quiet winter weather expected across the region. Winds will diminish Friday evening as the pressure gradient slackens. Surface high pressure will slide into the southeastern U.S. with a split upper flow, keeping all the major weather makers out of the Great Lakes. As flow becomes southwest/westerly across the region, modified Pacific air will invade the area with well above normal temps expected. Sunday still looks to be the warmest day, with 850mb temps climbing to between 2-4C. This should allow some 40s across central and east central WI. Weak cold front still forecast to cross the area on Sunday, but very limited moisture and little upper support should keep things dry.

Monday and Tuesday . upper trough and surface low will consolidate across the Plains, then eject toward the Great Lakes. Models continue to be on different pages on how things will play out. GFS is the farther north and slowest, which would bring accumulating snow to the area Monday into Tuesday. The Canadian and ECMWF are faster and farther south/east. Ensemble data not giving providing much help either. If a major system were to impact the area next week, this looks to be best chance as Gulf moisture will have a chance to get wrapped into the system. So this bears watching, but will just use a model blend for now, which keeps chances for snow for most of the area. As the system exits east of the area on Tuesday, lingering snow showers are possible due to cyclonic flow and a weak shortwave moving through.

Wednesday and Thursday . flow turns to the northwest behind the system, bringing colder temps back to the region. Embedded shortwaves will bring chances for light snow shower chances from time to time, but limited moisture looks to keep totals on the low side. Highest totals and most widespread activity will be over northern WI where activity off of Lake Superior will aid in snow shower development. 850mb tumble into the teens below zero, which will bring near or below normal temps to the area.

AVIATION. for 00Z TAF Issuance Issued at 529 PM CST Thu Feb 20 2020

Low level wind shear is possible after midnight through Friday morning with west winds around 35 knots at 1000 ft and southwest winds of 5 to 10 knots at the surface. Otherwise good flying weather is expected through at least Saturday with VFR flight conditions.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . RDM LONG TERM . Bersch AVIATION . Kurimski


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWNW3 - 9087069- Kewaunee, WI 28 mi47 min WSW 8 G 12 13°F 1034.6 hPa
MN4 - 9087088 - Menominee, MI 36 mi47 min SSW 9.9 G 12 16°F 35°F1033.5 hPa-6°F

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Green Bay, Austin Straubel International Airport, WI16 mi24 minWSW 910.00 miFair13°F-6°F42%1037.7 hPa

Link to 5 minute data for KGRB

Wind History from GRB (wind in knots)
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Last 24hrW8W10W10W10W9NW8W7NW8NW9NW9NW9NW8CalmW4W5W4W4W8W9W11W12W8SW9W9
1 day agoW15
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NW13NW7NW10NW9W6W8W7W6W7W8W10W9W11W12W10W9W12W10W9SW8SW8
2 days agoSE8SE11E9--SE5E4N4N5NW5NW7NW13W12W13W14
G22
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G25
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W15W16W14W12W15
G21
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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 (19,4,5,8)
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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.