Sunday, January26, 2020
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Marine Weather and Tides
Waukegan, 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 7:09AMSunset 4:58PM Sunday January 26, 2020 4:55 AM CST (10:55 UTC) Moonrise 9:30AMMoonset 7:47PM Illumination 2% Phase: Waxing Crescent; 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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LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 312 Am Cst Sun Jan 26 2020
Today..West winds 10 to 20 kt. Cloudy. Waves 2 ft or less.
Tonight..West winds 10 to 15 kt. Cloudy. Waves 2 ft or less.
Monday..Northwest winds 5 to 10 kt. Cloudy. Waves 2 ft or less.
Monday night..Northwest winds 5 to 10 kt. Slight chance of drizzle. Waves 2 ft or less.
LMZ740 Expires:202001261615;;534337 FZUS53 KLOT 260912 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 312 AM CST Sun Jan 26 2020 For waters within five nautical miles of shore on Lake Michigan Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered. LMZ740>742-261615-


7 Day Forecast for Marine Location Near Waukegan, IL
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location: 42.37, -87.8     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 260857 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 257 AM CST Sun Jan 26 2020

SHORT TERM. 235 AM CST

Through Monday .

The threat of drizzle and freezing drizzle will continue to wane across the area early this morning. Thereafter a dry day is expected across the area. However, expect cloud cover to hang on over the area, with highs today in the lower to mid 30s.

Tonight another weak mid-level disturbance is forecast to shift over the area. However, it appears our lower level saturation (cloud depth) may remain too shallow to support any light drizzle or snow for most of the area. With this in mind, I continued with a dry forecast for much of the area. I did, however, add in a small mention of flurries over parts of Porter county IN very late Sunday night and into Monday, as it appears the winds over southern Lake Michigan will veer more northerly in the wake of this disturbance. As a result, some very light lake effect snow showers/flurries could try to work onshore across the area into Monday morning. Fortunately the thermodyamics do not look very favorable for any real accumulation with this activity, with inversion heights likely barely reaching 4,000 feet. For this reason, I am only mentioning flurries in the forecast at this time.

Outside of the light lake effect snow potential in Porter county, it appears most area will remain dry through the day Monday. High temperatures on Monday should again top out in the low to mid 30s under cloudy skies.

KJB

LONG TERM. 257 AM CST

Monday night through Saturday .

The primary weather concern during the long term period will be the on and off again small chances for light precipitation (possibly with a period, or two, of freezing drizzle) as weak Pacific origin weather disturbances shift across the area.

The first of these disturbances looks to move across northern IL Monday night into Tuesday morning. While mid-level moisture will remain very low, it appears that the low-level moisture (cloud depths) with this disturbance could get just deep enough to support a period of very light precipitation Monday night into Tuesday morning. This raises some concerns for the possibly for some freezing drizzle as cloud top temperatures could remain at, or warmer than -10C. Given the uncertainties this far out, I decided to add a mention of mix of light snow and freezing drizzle Monday night into Tuesday morning, mainly for areas north of I-80.

The next potential Pacific disturbance could approach the area by Wednesday morning. This could result in yet another small chance for a period of light precipitation late Tuesday night into Wednesday. For now, I have only mentioned a precipitation type of light snow with this disturbance. However, we will need to keep an eye on how cold cloud top temperatures are able to get during this period, as freezing drizzle could yet again become a small possibility into early Wednesday morning.

Later in the week some additional Pacific disturbances could impact parts of the area. Certainly there is no signs of any significant storm systems, but another small chance for mainly light snow will be possible late Thursday night into Friday morning, and again on Saturday.

KJB

AVIATION. For the 06Z TAFs .

The only aviation weather concern through the period, outside of IFR and MVFR cigs, is the continuing potential for some light -DZ and/or -SN through late tonight.

IFR cigs will prevail through the rest of the night before they become more predominantly low-MVFR by Sunday morning. Don't anticipate much in the way of improvement through the day, with MVFR cigs looking like they'll linger even into the overnight hours on Sunday.

Continue to see some some very light radar returns across the area and immediately upstream and occasional light precipitation is occurring with these. Latest IR satellite imagery shows that cloud top temperatures are running about -10 degrees, and corroborated by earlier aircraft data. As such, continue to think that while occasional -DZ may occur, there may be just enough ice present to keep any occasional precipitation as -SNDZ. The axis of ascent which seems to be driving this light precipitation looks to move east of the terminals by about 10-11z. Light westerly winds will prevail through the forecast period.

Carlaw

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . None. LM . None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KNSW3 - Kenosha, WI 15 mi55 min W 8.9 G 15 34°F 1011.9 hPa (+0.0)
CHII2 - Chicago, IL 34 mi35 min W 14 G 16 34°F 33°F
CNII2 37 mi25 min W 7 G 11 33°F 29°F
CMTI2 - 9087044 - Calumet, IL 46 mi55 min 33°F 1012.6 hPa (+0.3)31°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL5 mi60 minVar 58.00 miOvercast34°F28°F82%1012.7 hPa
Kenosha, Kenosha Regional Airport, WI17 mi62 minW 109.00 miOvercast35°F30°F82%1012.3 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi63 minW 610.00 miOvercast34°F28°F82%1013.7 hPa

Link to 5 minute data for KUGN

Wind History from UGN (wind in knots)
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Last 24hrCalm3W333W44W4W5W4W5W3W6W5W4W4W6W4W4W53W5W75
1 day agoE8E6E5E7E6E5E4E5E4E5E4CalmNE4CalmCalmCalmCalmCalmCalmSW3CalmW3W43
2 days agoS6S5S6S7S5S6S6S3SE8SE6SE5SE5SE4SE6SE6SE5E4CalmE6E7E5NE7NE7NE8

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    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 (5,6,7,8)
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Ground Weather Radar Station Chicago, IL
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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.