Friday, June23, 2017 L-36.com


Marine Weather and Tides
Lincolnwood, IL

Version 3.4
What's New / NOTES
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 5:14AMSunset 8:31PM Friday June 23, 2017 3:53 PM CDT (20:53 UTC) Moonrise 5:01AMMoonset 8:01PM Illumination 0% Phase: New Moon; Moon at 29 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- 901 Am Cdt Fri Jun 23 2017
Rest of today..Northwest winds 10 to 15 kt becoming variable and then southeast to less than 10 kt in the afternoon. Mostly cloudy through early afternoon, then clearing. Waves 1 to 3 ft.
Tonight..Northwest winds 10 to 20 kt. Mostly clear. Waves 1 to 3 ft building to 2 to 4 ft after midnight.
Saturday..West winds 15 to 20 kt. Mostly Sunny. Waves 2 to 4 ft.
Saturday night..West winds 10 to 20 kt. Slight chance of showers in the evening. Waves 1 to 3 ft.
LMZ741 Expires:201706232145;;692040 FZUS53 KLOT 231401 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 901 AM CDT Fri Jun 23 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>742-232145-

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 232007
afdlot
area forecast discussion
national weather service chicago romeoville, il
307 pm cdt Fri jun 23 2017

Short term
141 pm cdt
through Saturday...

klot radar getting a breather this afternoon as a cold front has
pushed showers and storms southeast of the area. Comfortable
dewpoints have fallen considerably, with near 50s north to around
60 south with just a few high clouds, and temperatures in the mid
70s to near 80 makes for a fairly pleasant Friday afternoon.

Meanwhile aloft, the upper air pattern features a low over james
bay, with another low near the manitoba lakes region. Several
shortwave disturbances ahead of the latter low will continue in
the westerly flow across the plains. The first disturbance will
lead to clouds and some showers upstream this afternoon, but its
arrival later this afternoon early evening is not favorable for
much in northeast il or northwest in more than some light showers
or sprinkles farther west as higher surface pressures will spread
i.

Expect a quiet night with clearing skies. Winds will hold out of
the west as the surface high remains well off to our west, and low
pressure will shift east through the ohio valley and towards the
atlantic. The upper low across manitoba will spread southeast
through the upper midwest on Saturday morning, then to the western
great lakes late in the day. Fairly cold air aloft for late june
will allow some very steep low level lapse rates to set up. Expect
some later morning to early afternoon cumulus development and
likely some breezy west-northwest winds as the surface pressure
pattern remains the same and decent mixing will occur due to the
steep lapse rates. Forecast soundings do depict a bit of an
inversion around 850 mb or so, which would suggest any showers
that form that would be isolated, shallow and largely void of
thunder. Otherwise, seasonally cool temperatures will top off in
the low to mid 70s, with cool dewpoints dropping into the 40s in
the afternoon.

Kmd

Long term
259 pm cdt
Saturday night through Friday...

for the longer term forecast period, general trends remain
consistent with previous runs and the short term forecast period
trends.

By Saturday night, the longwave pattern will continue to trend to a
high amplitude, low wavelength, slowly progressive longwave pattern.

Broad upper troughing east of the rockies and strong upper ridging
over the west coast. The general trend through the weekend and into
early next week will be for well below normal temperatures and low
precipitation chances. A series of weak shortwaves will drop
through the nwly flow aloft helping to deepen the upper trough
Sunday and Monday and MAX temperatures will be the lowest of the
period with highs only in the lower 70s. It is possible that some
locations may only reach the upper 60s. Highs in the upper 60s to
lower 70s would be 10 to 15 degrees below seasonal normals, which
are in the lower 80s for late june. With broad cyclonic flow aloft
persisting across the region through early next week, there will be
periodic chances for scattered showers or a few isolated
thunderstorms, particularly in the afternoon hours. By Tuesday and
through the remainder of next week, the upper ridge will begin to
progress east, with heights building across the region. At the
surface, the high pressure that will cover the region through the
weekend and early next week, will shift east, setting up a return
flow of warm moist air. A warming trend will begin on Tuesday with
highs increasing to the upper 70s. The warming trend will continue
through the week, with temps rebounding back to the lower to middle
80s. The next significant chance for precipitation will come by
Wednesday night into Thursday as low pressure develops over the
northern plains and tracks to the western great lakes. Increasing
warm moist advection in advance of this system will bring increasing
chances for showers and thunderstorms.

Aviation
For the 18z tafs...

concerns revolve around wind directions around
ord mdw. Otherwise conditions will be fairly benign.

The lake influence from the cold front has eased, and ord mdw have
settled back to northwest wind direction. Winds at the lake front
do slacken and some form of a lake breeze has formed with
northerly island currently ne, but most locations hold the NW wind.

Current high res- guidance keeps the lake breeze out of ord, and
most guidance keeps it out of mdw as well, though mdw could
briefly jump over to NE this afternoon.

Upper level low pressure across the northern plains will spread
some clouds and showers to NW il and SW wi, but our sites remain
dry. After clearing later today tonight, the upper low will push
to the western great lakes. Expect some afternoon stratocumulus
clouds, with a low chance of a shower.

Otherwise, high pressure will remain across the plains while low
pressure will shift across the ohio valley and to the atlantic
coast on Saturday. This will maintain modest west winds through
the remainder of the TAF period.

Kmd

Marine
307 pm cdt
low pressure over quebec will continue to lift northeast while a
trailing cold front pushes through the ohio valley. A series of
weak troughs and secondary surges of cooler air will push across
the western great lakes region, keeping winds generally
northwesterly through the weekend and into early next week. High
pressure building out of canada will spread into the northern and
central plains over the weekend and then build over the great
lakes early next week. Low pressure will begin to develop over the
northern plains Tuesday night and Wednesday as the high slides to
the east. Increasing sly-swly winds will set up over the lake as
the low pressure and an associated cold front push across the
northern plains to the upper mississippi valley Wednesday night,
while the high more slowly moves off the mid atlantic coast.

Increasing sly-swly winds up to 25-30 kt will set up over lake
michigan for Wednesday and Thursday and then diminish and turn
more westerly late next week following the passage of the cold
front.

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
FSTI2 2 mi113 min NNW 7 72°F
CHII2 - Chicago, IL 4 mi53 min NNE 8.9 G 8.9 74°F 55°F
45177 4 mi173 min 69°F
CNII2 7 mi38 min 75°F
JAKI2 12 mi113 min SSE 1 73°F
45174 13 mi33 min N 5.8 G 7.8 73°F 68°F1 ft54°F
CMTI2 - 9087044 - Calumet, IL 16 mi53 min NE 5.1 G 7 73°F 1006 hPa (+0.4)61°F
WHRI2 - Waukegan Harbor, IL 30 mi73 min NW 13 G 18 78°F
BHRI3 - Burns Harbor, IN 33 mi51 min Calm G 2.9 73°F 1007.1 hPa
45170 38 mi33 min SW 1.9 G 3.9 68°F 69°F1 ft64°F
MCYI3 - Michigan City, IN 41 mi53 min WSW 2.9 G 2.9 68°F 61°F
KNSW3 - Kenosha, WI 45 mi53 min WNW 13 G 18 79°F 1005.1 hPa (+0.0)

Wind History for Calumet Harbor, IL
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N13
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G8
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G11
NE9
NE8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL13 mi60 minNW 19 G 2410.00 miPartly Cloudy and Breezy82°F45°F27%1004.8 hPa
Chicago, Chicago-O'Hare International Airport, IL14 mi62 minNW 1210.00 miPartly Cloudy82°F45°F27%1005.3 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi61 minNW 13 G 1810.00 miFair81°F46°F29%1005.6 hPa

Wind History from MDW (wind in knots)
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Last 24hrSW17S15
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S13S13
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S16S14S9
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S12
G20
S11SW9SW10SW6W8W4NW7N5N7NW11N12N8N11
G15
NW19
G24
1 day agoE12E11E9E7E6E5E6SE6E3SE4S6S6SW12SW12SW10S10SW8SW13S13SW15S12SW13SW11
G17
SW13
G21
2 days agoE17E10E11E6E7NE6NE7E4E4CalmNE5NE3CalmNE3CalmE7E6E10E105E5E5E4E8

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.