Friday, December6, 2019
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Marine Weather and Tides
Lincolnwood, IL

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:01AMSunset 4:21PM Friday December 6, 2019 10:28 AM CST (16:28 UTC) Moonrise 2:42PMMoonset 2:10AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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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LMZ741 Expires:201912062245;;941405 Fzus53 Klot 061500 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 900 Am Cst Fri Dec 6 2019 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>742-062245- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 900 Am Cst Fri Dec 6 2019
.small craft advisory in effect until 6 pm cst this evening...
Rest of today..North winds to 30 kt diminishing to 10 to 20 kt by early afternoon. Becoming mostly Sunny. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft in the afternoon.
Tonight..North winds 5 to 10 kt becoming light and variable by midnight. Partly cloudy. Waves 3 to 5 ft subsiding to 1 to 3 ft after midnight.
Saturday..South winds 10 to 20 kt. Mostly Sunny. Waves 1 to 3 ft.
Saturday night..South winds to 30 kt. Partly cloudy in the evening then becoming mostly cloudy. Waves 2 to 4 ft.
LMZ741


7 Day Forecast for Marine Location Near Lincolnwood, IL
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location: 41.95, -87.63     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 061127 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 527 AM CST Fri Dec 6 2019

SHORT TERM. 330 AM CST

Through Saturday .

After a mild afternoon with temps in the upper 40s to low 50s, a cold front has made its trek across the forecast area early this morning ushering in a period of cooler temps for today. Winds have become gusty at times behind the front out of the north, with gusts to 25-30mph and occasionally higher gusts possible through midday. Rockford has already gusted to 30 mph so far this morning. Expect temps to continue their gradual drop to near 30, with morning lows likely occurring even a few hours after sunset with continued cold air advecting into the region. A fairly expansive, albeit patchy stratus deck has moved in behind the front this morning as well and should linger through late morning before gradually lifting and moving off to the southwest. Even if skies manage to clear out more quickly today, still expect highs to remain in the 30s.

The stronger north winds this morning will increase wave action on Lake Michigan through the afternoon, with waves building into the 6-9 ft range for the northwest Indiana nearshore, which is approaching lakeshore flood advisory criteria.

By tonight surface high pressure moves in overhead with clear skies and light winds suggesting lows drop quite quickly into the low to mid 20s. Some areas could see lows in the teens by early Saturday morning, especially areas west of the metro. Winds turn southerly on Saturday as the high shifts off to the east. This should help bring in some warmer air, with highs generally around 40.

Petr

LONG TERM. 320 AM CST

Saturday night through Thursday .

The long term forecast period will start out relatively mild as the region will be under broad warm advection in swly flow between sfc high pressure over the Mid-Atlantic region and a sfc trough/cold front across the Central Plains. Lows Sunday morning should be in the lower 30s. Prevailing southwest flow will continue through the day on Sunday as the sfc trough/cold front progression slows, blocked by sfc ridging through the sern CONUS/ern GLFMX. Highs Sunday should be in the middle to upper 40s, with the chance for temps to reach 50 F, particularly for the far southern portions of the CWA. Pcpn associated with the approaching system may begin as early as late Sunday afternoon over the far nwrn portions of the CWA as the front approaches, but better chances for pcpn, mainly in the form of rain, will begin sunday night and continue into Monday night. As the cold front pushes across the region on Monday, winds will shift from swly to nwly through the afternoon, with strong cold advection setting up in the wake of the fropa. Temperatures should drop off quickly Monday night while nwly winds strengthen, with gusts of 25-30 mph likely. By Tuesday morning, temperatures will range from the middle teens northwest to the middle 20s southeast. Pcpn will transition from rain to snow as the colder air filters in behind the cold front, with some light accumulation possible. Following the passage of this system, the main forecast concern will be temperatures for the middle of next week. Latest long range guidance continues to suggest lows in the single digits across portions of the area north and west of a line from Chicago to Pontiac, with 10 to 12 F south and east of this line. There will likely be little moderation to temperatures as arctic high pressure slides across the area Wednesday and then settles into the Ohio Valley Thursday. With winds expected to remain arnd 10-15 mph, wind chill readings should be in the should may drop to -5 to -10 F for Tuesday and Wednesday morning. Conditions should begin to moderate by Thursday as the arctic high pushes into the sern CONUS and flow shifts to swly.

AVIATION. For the 12Z TAFs .

The concerns with the Chicago area TAFs are this morning's gusty northerly winds.

In the wake of a cold front that passed very early this morning, gusty northerly winds will continue through the morning. Confidence is high in gusts exceeding 20 kt being frequent through this morning, with some exceeding 25 kt, especially through 14Z. After 16Z, gusts should start to diminish, but probably only gradually through 18Z-19Z, and then abate altogether. Confidence in wind speeds through the TAF is medium-high.

As for forecast wind direction, 350-360 degrees this morning is with high confidence, and 360-010 this afternoon is with medium confidence.

As for clouds, a broken layer of MVFR will be passing over the region this morning before strengthening subsidence and weakening cold advection result in the clouds scattering.

MTF

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . None. LM . Small Craft Advisory . IL nearshore waters until 6 PM Friday.

Small Craft Advisory . IN nearshore waters until midnight Saturday.



VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHII2 - Chicago, IL 4 mi39 min NNW 21 G 22 35°F 29°F
CNII2 7 mi29 min NNW 12 G 19 34°F 27°F
CMTI2 - 9087044 - Calumet, IL 16 mi59 min NNW 15 G 20 35°F 1023.5 hPa28°F
MCYI3 - Michigan City, IN 41 mi39 min N 26 G 28 37°F 28°F
KNSW3 - Kenosha, WI 45 mi29 min NNW 13 G 18 33°F 1024.7 hPa (+2.7)

Wind History for Calumet Harbor, IL
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W6
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G15
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G12
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SW10
G16
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G14
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G19
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G18
W8
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL13 mi36 minN 15 G 2110.00 miMostly Cloudy35°F24°F64%1025.3 hPa
Chicago, Chicago-O'Hare International Airport, IL14 mi38 minN 1610.00 miMostly Cloudy35°F24°F64%1025.1 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi37 minN 910.00 miOvercast35°F24°F64%1025.9 hPa

Link to 5 minute data for KMDW

Wind History from MDW (wind in knots)
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Last 24hrS8S9S7S8S10
G17
S7S6S5S7S7S7SW5SW6SW6SW8W8W7N10N16
G24
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1 day agoW14
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G26
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NW11W11
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W10W7W5NW5W4W4W5W5W3W6CalmCalmCalmS3SW4SW5
2 days agoSW12W13SW16
G21
SW14W15
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SW10SW8SW8SW11SW11W8W10W10W9W12
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W9W10W11W10W9W8W8W10W13
G21

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 (11,2,3,4)
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Ground Weather Radar Station Chicago, IL
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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 numerious 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.