Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Lincolnwood, IL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:45AMSunset 7:08PM Thursday March 23, 2017 1:17 AM CDT (06:17 UTC) Moonrise 4:11AMMoonset 2:27PM Illumination 20% Phase: Waning Crescent; Moon at 25 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 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 902 Pm Cdt Wed Mar 22 2017
Rest of tonight..East winds around 10 kt becoming southeast at 15 to 20 kt overnight. Mostly cloudy. Waves 1 to 3 ft building to 2 to 4 ft toward daybreak.
Thursday..Southeast winds 15 to 25 kt. Slight chance of showers in the afternoon. Waves 3 to 5 ft occasionally to 7 ft. A small craft advisory may be needed in the afternoon.
Thursday night..South winds 15 to 20 kt. Slight chance of showers and Thunderstorms in the evening. Waves 2 to 4 ft.
Friday..Southwest winds 15 to 25 kt. Slight chance of showers in the afternoon. Waves 1 to 3 ft building to 2 to 4 ft in the afternoon.
LMZ741 Expires:201703231045;;928656 FZUS53 KLOT 230202 NSHLOT NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 902 PM CDT WED MAR 22 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>742-231045-

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 230523
afdlot
area forecast discussion
national weather service chicago/romeoville, il
1223 am cdt Thu mar 23 2017

Short term
158 pm cdt
through Thursday...

warm advection will kick in tonight as cool high pressure exits to
the eastern great lakes region. Mid and high clouds from low
pressure off the ca coast will stream east-southeast over the area
tonight over a flattening ridge across the plains. With the
increasing clouds expect temps to hold a tad warmer than last
night.

The developing warm front will shift northeast across the area
later Thursday and Thursday night. Lower level warm advection with
this front will likely kick off some scattered afternoon showers.

Weak upper ridging and southeasterly flow maintaining drier lower
level conditions will preclude more widespread shower activity.

In spite of cloudier conditions, highs will recover closer to
normal, except away from the lake in northeast il where onshore
flow remains.

Kmd

Long term
330 pm cdt
Thursday night through Wednesday...

theme of the extended is a jump to much warmer temperatures Friday.

A cold front brings temps back down into the 50s and 60s Saturday
and temps stay relatively steady through the remainder of the
forecast. Periods of rain and storms are expected for much of the
weekend.

A surface low takes shape over the plains Thursday night, and we'll
be in the warm sector Friday. Still looking at above normal highs
around 70, but have questions regarding how well we will warm with
thick cloud cover overhead. Typical gusty southwest winds are
forecast, and continue to think the majority of precip will stay in
wi, north of the forecast area.

Showers spread across the area from northwest to southeast Friday
evening through Saturday morning as a cold front surges down the
lake and upper level vorticity lobes move over the forecast area. I
have medium-high confidence in embedded thunderstorms Friday night,
but less confidence in storms Saturday morning. CAPE and the better
forcing look to be tied to low itself, so if the low is closer to
the forecast area Saturday, could see more thunder than forecast.

However, if the low is slower and further from the forecast area,
there could be less thunder. I have high confidence in measurable
precip Saturday, but there could be brief dry periods.

The low moves over the forecast area Sunday and continues northeast
to the eastern great lakes Monday. Showers associated with the
first low come to an end Sunday night. Long range models differ on
how the next low will evolve, but they do agree that we may be on
the northern fringe of its precip. High pressure then builds in mid
week.

Extended temps past Friday will generally be in the 50s or low 60s
away from the lake. Onshore flow will keep the lake front around 10
degrees cooler.

Jee

Aviation
For the 06z tafs...

a surface area of high pressure over the eastern great lakes will
shift eastward over the central atlantic coast by late afternoon.

As this occurs, expect the current light easterly winds to become
southeasterly 10 to 15 kt during the day. By late this evening, a
warm front, associated with low pressure developing over the
central high plains, is expected to shift northward over the area.

Prior to its passage, a period of MVFR CIGS and some scattered
showers will be possible, particularly during the evening.

However, once the front lifts north of the area, expect south-
southwesterly winds with the main precip chances and lower CIGS to
shift northward into wisconsin.

Low level wind sheer may also become an issue tonight as winds
1500-2000 ft agl increase to 50-55 kt. In spite of the fact that
surface winds could be up around 10 to 15 kt (with some slightly
higher gusts) late tonight with the passage of the warm front, the
actual magnitude of the winds off the surface are high enough to
justify a mention of such in the latest tafs.

Kjb

Marine
330 pm cdt
high pressure over the lake will continue to shift southeast
reaching the mid atlantic coast Thursday. 30 kt south winds set up
on the back side of the high Thursday. Do not have the confidence
to issue a small craft advisory at this time, but winds and waves
may be hazardous to small craft Thursday. A cold front sinks south
across the lake Friday and Friday night, and winds become north
behind it. Meanwhile, the next surface low forms over the plains
Thursday night into Friday. The low weakens as it moves over
illinois Sunday morning and then dissipates over the eastern great
lakes Monday. Guidance then differs on how the pattern will evolve
early next week. The ECMWF features a baggy pattern with light
winds while the GFS has another low move up the ohio valley with
strong northerly winds over the lake.

Jee

Lot watches/warnings/advisories
Il... None.

In... None.

Lm... None.

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
FSTI2 2 mi138 min E 14 33°F
OKSI2 3 mi138 min ESE 5.1 35°F
CHII2 - Chicago, IL 4 mi28 min ESE 13 G 14 34°F 26°F
CNII2 7 mi18 min ESE 11 33°F
JAKI2 12 mi138 min ESE 7 35°F
CMTI2 - 9087044 - Calumet, IL 16 mi48 min ESE 6 G 8 33°F 1031.5 hPa26°F
WHRI2 - Waukegan Harbor, IL 30 mi38 min ESE 8.9 G 9.9 32°F
BHRI3 - Burns Harbor, IN 33 mi38 min E 5.1 G 7 30°F 1032.5 hPa
MCYI3 - Michigan City, IN 41 mi28 min ENE 4.1 G 4.1 29°F 20°F
KNSW3 - Kenosha, WI 45 mi78 min SE 8.9 G 9.9 31°F 1032.2 hPa (-0.6)

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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Last
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N19
G27
N16
G25
N17
G25
N17
G24
NE16
G22
NE17
G24
NE15
G21
NE14
G18
NE11
G18
NE13
G17
NE11
G14
NE10
G14
NE10
G14
NE9
G12
NE8
NE7
G10
N8
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NE7
NE7
G10
NE6
E7
G11
E8
SE8
G11
1 day
ago
NW10
G15
NW10
G13
NW7
G10
NW7
G10
NW7
G11
SW2
W2
NW12
G16
NW14
G20
N11
G18
N12
G18
N11
G16
N8
G13
N9
G12
N12
G16
N12
G16
N11
G14
N8
G11
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N15
G19
N17
G24
N21
G28
N22
G30
N20
G26
2 days
ago
E8
SE10
G16
SE5
G8
SE5
G8
SE4
S7
G10
S9
G12
S7
G11
W4
N5
N6
G10
NW5
NW8
G11
NW10
G13
NW9
G18
NW9
G13
NW8
G13
NW11
G16
NW9
G15
NW8
G11
NW9
G13

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL13 mi25 minE 510.00 miPartly Cloudy32°F25°F75%1032.8 hPa
Chicago, Chicago-O'Hare International Airport, IL14 mi27 minE 610.00 miA Few Clouds31°F21°F69%1031.8 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi26 minN 010.00 miFair25°F21°F85%1032.7 hPa

Wind History from MDW (wind in knots)
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Last 24hrN20
G26
NE21
G31
NE17
G26
N19
G27
N19
G23
NE17
G21
NE15NE13
G21
NE13
G21
NE9
G21
NE14
G20
NE13
G20
E10N7
G17
46NE7N7N965E55E5
1 day agoN7N76NW4NW4NW3NW5N11
G23
N15
G22
N13
G22
NW10
G20
NE11
G18
NE11
G20
NE14
G21
N16
G21
NE17NE14
G20
E12
G20
NE10NE18NE18NE23
G31
N21
G32
NE16
G28
2 days agoSW12
G21
5SE66SE8SE6SE8SE7S7S8SW5SW5N8NE10
G20
N16
G23
N10
G19
N18
G22
N11
G20
N7N7N8
G19
N8
G22
NE7N8
G18

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 (2,6,7,8)
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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.