Saturday, January25, 2020
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Marine Weather and Tides
Winthrop Harbor, IL

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 7:10AMSunset 4:56PM Saturday January 25, 2020 1:42 PM CST (19:42 UTC) Moonrise 8:56AMMoonset 6:44PM Illumination 1% Phase: New Moon; Moon at 1 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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LMZ646 Wind Point Wi To Winthrop Harbor Il- 106 Pm Cst Sat Jan 25 2020
Rest of today..West wind 10 to 15 knots. Patchy fog through the day. Slight chance of snow early in the afternoon. Slight chance of drizzle through the day. Waves around 1 foot.
Tonight..West wind 10 to 15 knots becoming west 10 to 15 knots with gusts to around 20 knots in the late evening and overnight. Patchy drizzle through around midnight. Waves around 1 foot.
Sunday..West wind 10 to 15 knots. Cloudy. Waves around 1 foot.
Sunday night..West wind 10 to 15 knots becoming northwest 5 to 10 knots after midnight. Cloudy. Waves around 1 foot. Wave heights are for ice free areas.
LMZ646 Expires:202001252300;;504698 FZUS53 KMKX 251906 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 106 PM CST Sat Jan 25 2020 For waters within five nautical miles of shore on Lake Michigan LMZ646-252300-


7 Day Forecast for Marine Location Near Winthrop Harbor village, IL
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location: 42.47, -87.82     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 251930 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 130 PM CST Sat Jan 25 2020

SHORT TERM. 130 PM CST

Through Sunday night .

The center of the deep upper low has shifted to the vicinity of Lake Huron early this afternoon. There is still an elongated band of snow out of ahead one well demarcated deformation zone on the eastern flanks of the low. There is fairly sharp edge to the slightly deeper moisture with this band of snow. Surface temperatures are largely at freezing or higher and therefore the impacts from this band have largely been limited to some visibility reductions. Behind this band the moisture is subtly more shallow, but likely enough to result in some loss of ice nucleation aloft, thus we do still anticipate a transition to drizzle this evening. With temperatures expected to remain above freezing this should largely not be a problem, but locations that drop just a degree or two could see some light icing.

There is another sheared out wave on the far northern extent of the upper low across the upper Great Lakes, and some weak radar returns upstream of this can be seen across northern/central WI. Therefore the drizzle/freezing drizzle concern this evening. With coverage patchy and with marginal surface temperatures tonight, we will likely let the winter weather advisory to expire a bit early given the minimal impacts from the snow today (just a few tenths of accums) and signs of improved road conditions. But if any targeted areas (such as north central Illinois where slightly lower dewpoints may be) dip a bit colder or drizzle coverage is greater, we could envision a short fused special statement could handle this potential hazard this evening. This will bear monitoring and remains the near term forecast concern.

As the low pulls away tonight the light precip chances will end , but low level flow will remain cyclonic should allow skies to remain mostly cloudy on Sunday. Expect temperatures to remain fairly consistent only reaching the low to mid 30s. There is a subtle wave that will pass through or to our west Sunday night. Most guidance is dry with this across our area.

KMD

LONG TERM. 221 AM CST

Sunday night through Friday .

Fairly benign pattern for the long term period. Weak long wave troughiness over the Great Lakes expected to persist much of the upcoming work week with mainly just some weak clipper-like systems potentially affecting the area with some light precip chances at times. Looks to be a fairly cloudy period with continued above average temps, largely due to above average nighttime lows. Will probably be a bit larger of a temp gradient across the CWA between the deeper snow pack left behind from this current system, but until we have a better idea where the snow pack will lay out, didn't make any adjustments to temps.

- Izzi

AVIATION. For the 18Z TAFs .

A few more bands of snow will slide southeast through the terminals this afternoon, but the back edge is back over central WI. These bands will weaken and shift off to the southeast through the afternoon. Visibility will trend upward but there will likely still be some occasional IFR visibility through about 21z. With the upper trough still in the region there will still be continued lift across NE IL and NW IN to support light non accumulating precipitation into the evening. Moisture will become more limited such that precip may be a drizzle/flurries, with RFD already reporting drizzle late Saturday morning.

Ceilings may occasionally get to MVFR but near term guidance doesn't really support much in the way of improvement tonight into tomorrow so we have continued the IFR ceilings into tomorrow morning, with a better chance of getting into MVFR Sunday afternoon. Ceiling forecast for Sunday is only of medium-low confidence.

KMD

LOT WATCHES/WARNINGS/ADVISORIES. IL . Winter Weather Advisory . ILZ003-ILZ004-ILZ005-ILZ006-ILZ008- ILZ010-ILZ011-ILZ012-ILZ013-ILZ014-ILZ019-ILZ020-ILZ021- ILZ022 until midnight Sunday.

IN . None. LM . None.

Visit us at weather.gov/chicago

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/NWSChicago www.twitter.com/NWSChicago www.youtube.com/NWSChicago


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KNSW3 - Kenosha, WI 8 mi102 min W 7 G 8 33°F 1009.1 hPa (+0.3)
MLWW3 - Milwaukee, WI 37 mi62 min WNW 6 G 8.9 35°F
CHII2 - Chicago, IL 40 mi52 min W 13 G 15 35°F 35°F
CNII2 44 mi57 min W 8 G 8.9 35°F 32°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL4 mi47 minW 51.25 miLight Snow Fog/Mist35°F30°F85%1009.7 hPa
Kenosha, Kenosha Regional Airport, WI10 mi49 minW 61.50 miLight Snow Fog/Mist36°F33°F89%1009.4 hPa
Racine, Batten International Airport, WI20 mi49 minWNW 1010.00 miOvercast35°F30°F85%1009.5 hPa

Link to 5 minute data for KUGN

Wind History from UGN (wind in knots)
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Last 24hrE5E4CalmNE4CalmCalmCalmCalmCalmCalmSW3CalmW3W43Calm3W333W44W4W5
1 day agoSE6SE5SE5SE4SE6SE6SE5E4CalmE6E7E5NE7NE7NE8E8E6E5E7E6E5E4E5E4
2 days agoS10S10S9S10S10S11S9S12S9S11S9S10S10S6S4S6S5S6S7S5S6S6S3SE8

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 Chicago, IL (14,3,4,5)
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Ground Weather Radar Station Milwaukee, WI
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weather_mapweather_map weather_map

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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.