Wednesday, February24, 2021
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Marine Weather and Tides
Neenah, WI

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:36AMSunset 5:37PM Wednesday February 24, 2021 8:45 PM CST (02:45 UTC) Moonrise 3:30PMMoonset 6:25AM Illumination 97% Phase: Waxing Gibbous; Moon at 13 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:202011102315;;637191 Fzus73 Kgrb 102148 Mwsgrb Marine Weather Statement National Weather Service Green Bay Wi 348 Pm Cst Tue Nov 10 2020 Lmz521-522-541>543-563-565-567-102315- 348 Pm Cst Tue Nov 10 2020
.strong Thunderstorms approaching the waters... The areas affected include... Central and southern bay of green bay... NEarshore waters from washington island to sheboygan... Open waters of lake michigan from rock island passage to sheboygan... At 347 pm cst, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots, small hail and brief torrential downpours. These Thunderstorms were located along a line extending from near long tail point light to 6 nm south of green bay to 9 nm southwest of denmark to 14 nm west of cleveland, moving northeast at 50 knots. Locations impacted include... Sherwood point light, sturgeon bay ship canal light, long tail point light, jacksonport, peshtigo reef light, algoma, sturgeon bay, whitefish point, kewaunee pierhead light and sister bay. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4389 8773 4409 8770 4419 8751 4447 8754 4530 8699 4498 8736 4480 8733 4485 8758 4455 8802 4457 8804 4472 8798 4541 8682 4534 8647 4512 8646 4488 8669 4383 8709
LMZ543


7 Day Forecast for Marine Location Near Neenah, WI
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location: 44.18, -88.48     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 242343 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 543 PM CST Wed Feb 24 2021

Updated aviation portion for 00Z TAF issuance

SHORT TERM. Tonight and Thursday Issued at 246 PM CST Wed Feb 24 2021

The main concerns in the short-term forecast will be the potential for light snow/flurries late tonight into Thursday morning along with challenging low temperatures for tonight.

Tonight: The low pressure system that brought the rain and snow to the area Tuesday night will slide across the New England states this evening. High pressure will steadily build in from the Plains, creating fairly quiet conditions through much of the night. A weak shortwave is expected to brush through the northern portion of the area and touch off a few flurries or light snow showers, most concentrated along the WI/UP border overnight. Not expecting much, if any, accumulation from this system. Outside of any light precipitation overnight, expect cloud cover to increase from west to east.

Clouds are expected to clear across the area this evening, which will likely lead to an extended period of clearing through late this evening. In fact, timing the cloud cover arrival on satellite imagery, it looks like the clouds would arrive across central WI around midnight. This lends more support for the colder temperature trends across the area, especially across the areas that received fresh snow cover. After clouds begin to increase, temperatures will steady or slowly warm overnight. Overnight lows will likely drop into the single digits across the Northwoods and the low to mid teens elsewhere. Of course, if cloud cover arrives faster/slower, this will have an impact on temperatures.

Thursday: The surface ridge is expected to continue to shift east through the day Friday, which will bring fairly quiet weather to northeast Wisconsin. There may be a few lingering flurries in the morning; otherwise, expect clearing skies from late morning through early afternoon. High temperatures are expected to warm into the mid 30s for most locations.

LONG TERM. Thursday Night Through Wednesday Issued at 246 PM CST Wed Feb 24 2021

A few minor changes were made in the long term forecast, mainly revolving around precip potential on Sunday. Models continue to disagree on the potential for a colder day early next week.

Friday and Saturday . Dry and partly cloudy conditions are expected throughout Friday, and southwesterly winds will help boost temps into the middle 30s to lower 40s. Models continue to depict light snow moving across the area Friday night into Saturday morning as a quick moving clipper passes just north of the state. This coincides with a shortwave moving across the central or southern part of WI, exact placement varies by model. Overall forcing and moisture is a little less than yesterday's output, and as a result QPF/snowfall amounts are on the lighter side, with snow accumulations of 1 inch or less. Some rain or freezing drizzle at the start or end of event could also hinder snowfall totals. Roads may be slippery for a period Saturday morning, but with highs reaching the upper 30s and lower 40s Saturday road conditions should quickly improve.

Sunday . Have added a chance for light snow (mixed with a little rain) from 06Z to 18Z Sunday. Models continue to show an fgen band develop across the area during this time. The GFS is the strongest and most consistent in developing this band, however the ECMWF is also now showing some hints. Added chance PoPs for now, but confidence is still somewhat low. Will need to see how this trends over the next couple days.

Monday through Wednesday . Continuing to monitor the temperature trends early next week. The 12Z GFS is not as aggressive with the cold pocket of air reaching WI. For Monday, MEX guidance has come up to a high in GRB of 24 while the ECX has 36. This is an improvement from the 20 degree spread from the 00Z guidance. Continue to stick with a blended model solution for temperatures early next week, which would yield highs in the 20s on Monday. This is below normal, but not nearly as cold as a couple weeks ago. Temperatures bounce up to at or above normal level through at least midweek. Overall weather looks quiet as well, with high pressure early in the week and weather systems remaining either north or south of the state after that.

AVIATION. for 00Z TAF Issuance Issued at 536 PM CST Wed Feb 24 2021

Skies have cleared over the region, but satellite showed clouds quickly approaching from northern MN. Expect these to reach north central WI around midnight, but they may thin out a bit before they arrive in eastern WI late tonight. Although ceilings should start out around 6-7K FT, they are expected to lower to MVFR in parts of north central and central WI late tonight into early Thursday. Have also added a mention of flurries for the western TAF sites late tonight into Thursday morning, with a TEMPO group for snow showers at RHI. Expect clearing to occur late Thursday morning and early afternoon. Gusty west winds will also develop Thursday morning.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Cooley LONG TERM . KLJ AVIATION . Kieckbusch


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GBWW3 35 mi45 min WNW 2.9 G 2.9 34°F 1020 hPa (+3.8)
SGNW3 - Sheboygan, WI 51 mi45 min NW 8.9 G 11 37°F
KWNW3 - 9087069- Kewaunee, WI 56 mi45 min Calm G 1 31°F 1020.3 hPa (+4.2)

Wind History for Kewaunee MET, WI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Appleton-Outagamie, WI6 mi60 minVar 410.00 miFair30°F14°F51%1020 hPa
Wittman Regional Airport, WI13 mi52 minWNW 610.00 miFair31°F22°F69%1022 hPa

Link to 5 minute data for KATW

Wind History from ATW (wind in knots)
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Last 24hrSE4SE3SE4SE5E6CalmN4CalmN6N7N6NW8NW8N12
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W9W13W10W9SW9W8SW5SW3SW73
2 days agoE6E5E4CalmN3NW6NW9NW9NW13W9W11W10W11SW11SW11SW14SW13
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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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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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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.