Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Lake Bluff, IL

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:49AMSunset 4:26PM Tuesday November 21, 2017 3:23 PM CST (21:23 UTC) Moonrise 10:22AMMoonset 8:06PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 301 Pm Cst Tue Nov 21 2017
.small craft advisory in effect until 9 pm cst this evening...
Tonight..Northwest winds to 30 kt diminishing to 15 to 25 kt. Mostly clear. Waves 3 to 5 ft.
Wednesday..Northwest winds 10 to 20 kt becoming southwest 10 to 15 kt in the afternoon. Sunny. Waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon.
Wednesday night..Southwest winds 10 to 20 kt. Mostly cloudy. Waves 1 to 3 ft.
Thursday..West winds 10 to 20 kt. Mostly Sunny. Waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
LMZ740 Expires:201711220430;;761197 FZUS53 KLOT 212101 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 301 PM CST Tue Nov 21 2017 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>742-220430-

7 Day Forecast for Marine Location Near Lake Bluff, IL
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location: 42.28, -87.83     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 212053
afdlot
area forecast discussion
national weather service chicago romeoville, il
253 pm cst Tue nov 21 2017

Short term
226 pm cst
through Wednesday...

the cold front quickly pushing across the region extends from
northern indiana through central illinois at 230pm cst. A band of
pcpn along the front is filling in and some pcpn will continue invof
the front and should exit the far sern portions of the CWA by late
afternoon or early evening. Temperatures are dropping off in the
strong cold advection behind the front and expect that temperatures
should be in the upper 20s to lower 30s by shortly after sunset.

Skies should clear out from west to east through the remainder of
the afternoon and into the evening with much of nwrn il already
seeing scattering clouds. With clearing skies and diminishing winds
overnight, there should be a radiative cooling component to the
downward temperature trend along with the cold advection.

Temperatures tonight should drop into the lower to middle 20s across
area, with some isolated upper teens possible in sheltered low-lying
areas. With high pressure building in from the west tomorrow, winds
should be relatively light through the day and even with ample
sunshine, temperatures tomorrow will only reach into the lower to
middle 30s.

Long term
252 pm cst
Wednesday night through Tuesday...

some slight warming likely early in the period, as more defined
shortwave energy drops south across the region. Associated surface
trough does push across the region on Thursday but stronger
forcing will stay just to the north northeast of the area, along
with any precip. Right behind this system, little to no caa,
transitioning to more pronounced WAA on Friday ahead of an
approaching system. Warmer temps, likely above normal, return
Friday along with precip chances by late Friday into the start of
the weekend. Guidance continues to vary to the extent of any
precip but as a fairly strong shortwave swings through, some
scattered development will at least be possible.

Rodriguez

Aviation
For the 18z tafs...

main forecast concern for the period will be wind trends with the
passage of a cold front.

A narrow band of pcpn is moving east of the terminals at issuance
time, with only some lingering light rain likely at gyy for
another hour or so. With the pcpn, cloud bases should lower to
lower endVFR, 4-5 kft for the remainder of the afternoon. In the
strong cold advection and pressure rises following the frontal
passage, the gusty swly winds are shifting to nwly and should
remain gusty to 20-25 kt through the remainder of the afternoon.

By arnd 00z, the gradient should relax as high pressure begins to
spread across the middle mississippi valley, allowing winds to
drop off overnight. As the colder, drier air filters across the
region, sky cover should diminish to mostly clear overnight with
no operationally significant cloud cover. As the high pressure
continues to spread across the region tomorrow, conditions should
be dry, with relatively light, westerly winds.

Marine
252 pm cst
the gales have ended across much of the lake this afternoon, and
have let the gale warning expire this afternoon. However, could
see a few gale force gusts continuing for a time this afternoon
and have included this mention in the forecast. Winds will remain
elevated through tonight, with winds to 30 kt expected. This will
provide continued hazardous conditions for small craft along both
the illinois and indiana nearshore waters tonight. However, some
diminishing trend tonight is expected along the illinois side,
while waves remain elevated into Wednesday morning on the indiana
side. As high pressure moves across the region Wednesday, this
diminishing trend will briefly continue for much of the lake.

Winds increase Wednesday night ahead of a trough of low pressure,
with a fairly active weather supporting another period of higher
winds Friday into the weekend when gales will once again be
possible.

Rodriguez

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... Il nearshore waters until 9 pm Tuesday.

Small craft advisory... In nearshore waters until 9 am Wednesday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WHRI2 - Waukegan Harbor, IL 6 mi43 min NNW 17 G 25 33°F
KNSW3 - Kenosha, WI 21 mi83 min NW 16 G 21 34°F 1012.9 hPa (+4.4)
FSTI2 23 mi143 min NW 17 40°F
OKSI2 28 mi143 min NNW 5.1 42°F
CHII2 - Chicago, IL 29 mi33 min NW 19 G 21 39°F 22°F
CNII2 32 mi23 min W 14 G 14 39°F 20°F
JAKI2 37 mi143 min W 8 40°F
CMTI2 - 9087044 - Calumet, IL 41 mi53 min W 8 G 15 39°F 1012.5 hPa20°F

Wind History for Calumet Harbor, IL
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Last
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S14
G22
S14
G23
S17
G27
S18
G26
S16
G22
S16
G29
S18
G25
S21
G27
S17
G23
S15
G21
S13
G23
S14
G20
S15
G21
SW13
G19
SW10
G17
SW11
G15
SW10
G16
SW10
G16
SW9
G15
W8
G15
W8
G12
W7
G11
W6
G11
W7
G14
1 day
ago
W8
G15
SW8
G13
SW7
G10
SW6
G11
SW8
G11
SW4
G7
SW8
G13
SW9
G13
SW7
G12
SW7
G10
SW10
G13
SW9
G12
S9
G12
S10
G15
S12
G18
S11
G17
S13
G19
S12
G18
S17
G23
S13
G19
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G22
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G25
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G23
S15
G23
2 days
ago
NW18
G29
NW17
G24
NW15
G25
NW14
G24
NW13
G19
NW15
G22
NW13
G21
NW7
G14
NW15
G21
W10
G15
W8
G17
W12
G17
NW8
G14
NW11
G16
W7
G11
NW12
G17
W10
G19
W12
G18
W9
G14
SW9
G14
SW13
G18
SW10
G15
SW7
G15
W9
G13

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL10 mi28 minNW 10 G 1910.00 miFair34°F17°F50%1014.9 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi31 minNNW 14 G 2410.00 miFair36°F19°F50%1015.3 hPa
Chicago, Chicago-O'Hare International Airport, IL21 mi32 minNNW 2010.00 miMostly Cloudy and Breezy37°F19°F48%1014.6 hPa
Kenosha, Kenosha Regional Airport, WI22 mi30 minNW 13 G 2110.00 miA Few Clouds34°F16°F48%1014.7 hPa

Wind History from UGN (wind in knots)
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Last 24hrSW17
G23
S20
G27
SW19
G30
SW20
G31
SW21
G30
SW20
G31
SW20
G30
SW20
G28
SW16
G26
SW15
G27
SW18SW17
G26
SW13
G20
SW15
G21
SW13
G18
SW12
G19
SW10
G17
W7W9
G16
W10
G17
W8
G16
NW11
G20
NW11
G25
NW10
G19
1 day ago6346W6SW6SW8SW8SW9
G18
SW11
G15
SW9SW13SW10SW14SW10SW10SW13SW18
G25
SW18
G26
SW18
G26
SW13
G20
SW16
G23
SW16SW18
G25
2 days agoN14
G21
N11
G18
N10
G19
NW10
G18
NW8
G16
NW11
G22
NW6
G18
NW7NW8
G16
NW9NW95NW10
G15
5
G17
W9
G17
W8NW8NW12
G21
NW10
G18
W8W11
G18
W10
G18
W7
G17
W7
G17

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Chicago, IL (16,3,4,5)
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Ground Weather Radar Station Chicago, IL
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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 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.