Friday, November27, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Justice, IL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:53AMSunset 4:24PM Friday November 27, 2020 4:28 PM CST (22:28 UTC) Moonrise 4:12PMMoonset 5:05AM Illumination 94% 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
    EDIT      (on/off)   Help
LMZ742 Expires:202011280415;;493475 Fzus53 Klot 272115 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 315 Pm Cst Fri Nov 27 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>742-280415- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 315 Pm Cst Fri Nov 27 2020
Tonight..West to northwest winds 10 to 20 kt diminishing to around 10 kt late. Clear. Waves 1 to 3 ft.
Saturday..Southwest winds 10 to 15 kt increasing to 15 to 25 kt in the afternoon. Sunny. Waves 1 to 3 ft.
Saturday night..Southwest winds 10 to 20 kt. Clear. Waves 1 to 2 ft.
Sunday..Southwest winds 10 to 20 kt becoming northwest in the late afternoon. Mostly Sunny. Waves 1 to 3 ft.
LMZ742


7 Day Forecast for Marine Location Near Justice, IL
   Hourly   EDIT   Help
location: 41.75, -87.84     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KLOT 272046 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 246 PM CST Fri Nov 27 2020

SHORT TERM. 1204 PM CST

Through Saturday night .

Quiet conditions are in store with no significant forecast concerns for the first half of the weekend. This afternoon we'll finally be clearing out the pesky low clouds we've dealt with much of the past few days. The rest of the short term will then be mostly clear for a change. Influence of surface high pressure over the central Plains will extend across the area tonight, followed by the surface high passing to our south on Saturday. Winds becoming light to calm tonight will support good radiational cooling conditions for seasonable lows in the 20s outside of Chicago. Can't rule out some patchy ground fog I-80 and south where dew points will stay a bit higher, though no official mention yet in the grids, with confidence low and coverage likely to stay very patchy if any fog develops.

Westerly warm advection on Saturday will keep mixing heights pretty shallow, but with full sun and southwest winds gusting up to 25 mph in the afternoon, temperatures will rebound from the chilly start to the upper 40s to lower 50s, solidly above normal for the date. If mixing is a bit deeper than forecast, some mid 50s readings will be possible. This will be followed by lows a few to several degrees warmer than tonight on Saturday night, as southwest winds probably stay up in the 5-10 mph range. There could even be sporadic gusts as a fairly vigorous low level jet develops overhead.

Castro

LONG TERM. 244 PM CST

Sunday through Friday .

No major changes in the forecast as we look ahead to a storm system that will provide a glancing blow to portions of the area early next week.

A deep upper-low over the AZ/NM line this afternoon will drift east to southern OK by early Sunday before lifting along the Ohio River Valley Sunday night. Meanwhile, a trough over far northwest Canada today will dig southeast to the Upper Mississippi River Valley by late Sunday. Resultant phasing of the two features will yield a strengthening broad upper low encompassing the southern Great Lakes and Ohio Valley regions by Monday night. After the low slowly lifts northeast into Quebec by Wednesday, a mid-level saddle point will cross the area through Wednesday night. While slight run-to-run differences in both the temporal and spatial evolution of both features are evident in guidance through Tuesday, there have not been any significant changes among the collective deterministic and ensemble model suite.

Quiet weather should continue into Sunday as cloud cover increases in advance of the southern system. A cold front extending southwest from a low traversing Lake Superior Saturday night will cross the CWA during the afternoon hours, likely leading to falling temps for at least the northwest half of the CWA after earlier highs in the mid 40s. While deep moisture will be lacking along the front as it crosses most of the CWA, some guidance has trended toward an earlier arrival of a narrow band of higher PWAT air ahead of the approaching southern low. An axis of post-frontal snow, possibly mixing with rain at onset, may form roughly along and southeast of I-55 by mid- evening Sunday through the overnight hours. A light dusting of up to a few tenths of an inch of snow is possible during this time.

Attention then turns to increasingly favorable LES parameters into the Illinois shore and northwest Indiana later Sunday night into Monday night. Marginal 850hPa-SST delta T values around 12C (still sufficient for lake enhancement) will increase to around 15C by mid- morning Sunday. Meanwhile, lake-induced convective PBLs will grow as deep as 8-10kft. Additionally, fetch will be about an long as possible into northwest Indiana due to the slight cyclonic curvature in the wind field mostly matching the shape of Lake Michigan. Putting this together, a potentially impactful LES event still appears likely into northwest Indiana near and east of Gary. Higher probabilities of a dominate mid-lake band amid a strong low-level wind field will likely allow for a decent amount of inland propagation of the snow through portions of Newton and most of Jasper counties. With that said, some concern remains that slightly backed flow in the top of the convective layer combined with enhanced shoreline convergence could initially focus the LES band as far west as along the Illinois shore with the band edging a few miles inland (including downtown Chicago). This remains a lower probability scenario, but still something worth keeping an eye on.

Finally, though thermal profiles are marginal for snow growth and indicate near-surface temps possibly above freezing, substantial lift in the convective layer aided by the upper trough should be sufficient for producing >10:1 SLRs.

A prolonged strong northerly wind event remains likely late Sunday night through Tuesday, with the strongest winds throughout the day Monday. Gusts in excess of 35 mph across the east half of the CWA, with gusts to 45 mph possible near Lake Michigan (especially within and dominate LES band), are expected through much of the day Monday. Given the prolonged north wind event, the combination of large waves over at least 10 feet and surge will increase concerns for a higher end lakeshore flood event for northwest Indiana with notable impacts also for the Cook County shore Monday into Tuesday.

LES should end by Tuesday night as winds slowly diminish. Seasonable conditions with highs around 40 will then remain in place to close out next week.

Kluber

AVIATION. For the 18Z TAFs . 1204 PM CST

Concerns include: * Low CIGs improving this afternoon * SW wind gusts up to 20-25 kt late AM through Saturday afternoon

The pesky low CIGs will finally improve this afternoon. An initial clearing line will scatter out CIGs over the Chicago area around 19-20z, possibly followed by patchy MVFR CIGs through mid afternoon if batch out near RFD holds together enough. Skies will completely clear out with sunset and stay SKC the rest of the period. Can't rule out some patchy ground fog south of the terminals late tonight. West-northwest winds this afternoon will eventually become light southwest tonight and probably go calm at times outside Chicago. Southwest winds will pick up on Saturday as large high pressure passes well to our south. Expect gusts up to 20-25 kt from a 220-230 deg direction.

Castro

MARINE.

A strengthening storm system is expected to track along the western Appalachians into the lower Great Lakes Sunday night into Tuesday while a surface ridge persists from the Missouri River Valley into northern Ontario. These is an increasing likelihood for a prolonged north gale event over Lake Michigan Late Sunday night into Tuesday, with the strongest gales in excess of 40 knots Monday morning into the evening for the Indiana nearshore. The prolonged wind and long fetch will likely result in waves potentially to 15 feet along the Indiana nearshore and 10 feet for portions of the Illinois nearshore on Monday.

Kluber

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. 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
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CNII2 14 mi28 min WSW 6 G 11 44°F 33°F
CMTI2 - 9087044 - Calumet, IL 16 mi58 min SW 8 G 12 43°F 1017.7 hPa35°F
OKSI2 16 mi88 min WNW 1.9 G 6 46°F
CHII2 - Chicago, IL 18 mi38 min WSW 11 G 14 45°F 37°F
FSTI2 19 mi148 min 45°F
BHRI3 - Burns Harbor, IN 37 mi48 min WSW 6 G 7 44°F 1019 hPa
WHRI2 - Waukegan Harbor, IL 42 mi88 min W 13 G 15 43°F
MCYI3 - Michigan City, IN 49 mi38 min WSW 12 G 13 43°F 36°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last
24hr
S8
G11
S9
G13
S7
G10
SW4
S5
SW2
G5
S6
S7
G10
SW7
G12
SW6
G10
SW7
G10
SW4
G9
S4
SW3
G7
SW4
G8
SW4
SW4
G10
SW6
G10
W3
G6
SW4
G8
SW3
G8
W3
G8
SW6
G9
SW7
G10
1 day
ago
N6
NW4
NW4
W3
G6
W5
G10
W5
G11
W5
G8
W4
G7
W4
G7
SW5
G9
SW5
G9
SW7
G10
SW6
G10
SW7
G10
SW6
G10
SW5
G10
SW6
G10
SW6
G13
SW8
G12
SW8
G13
SW11
G16
SW7
G13
SW10
G16
S10
G14
2 days
ago
SE8
G13
SE7
G12
SE8
G11
S7
G13
S9
S9
G14
S9
G14
S8
G14
SW6
G11
S7
G10
S6
S5
SE4
SE4
S4
E4
E10
E9
E3
NE4
N3
G6
NE3
N4
N7
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL6 mi35 minW 710.00 miA Few Clouds43°F33°F68%1019.1 hPa
Chicago, Chicago-O'Hare International Airport, IL16 mi37 minW 710.00 miA Few Clouds44°F32°F63%1018.6 hPa
Lewis University Airport, IL17 mi53 minW 910.00 miPartly Cloudy42°F36°F82%1019 hPa
Lansing Municipal Airport, IL22 mi53 minW 910.00 miPartly Cloudy42°F33°F73%1018.6 hPa
Gary Regional Airport, IN24 mi43 minWSW 610.00 miFair43°F33°F71%1019 hPa
Joliet Regional Airport, IL24 mi53 minW 710.00 miPartly Cloudy44°F36°F76%1019.3 hPa

Link to 5 minute data for KMDW

Wind History from MDW (wind in knots)
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
Last 24hrSW9SW9SW7SW5S5SW4SW8SW7SW7SW9SW6SW5SW6SW8SW4W4W5SW5W6W7W6W9W7W7
1 day agoNE3N4N7NW8NW10NW9NW10NW8NW6W8W9W9W7W7W7W8SW8W9SW11SW11SW15
G21
SW12SW12SW9
2 days agoSE10SE8S9S7S7S12
G19
SW10S11
G17
SW8SW7S5S3SE4SE6SE5E4E9E9E6NE9E4NE5N6N10

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
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
Ground Weather Radar Station Chicago, IL
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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.