Sunday, November19, 2017 L-36.com


Marine Weather and Tides
Elmhurst, 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 6:46AMSunset 4:28PM Sunday November 19, 2017 3:35 PM CST (21:35 UTC) Moonrise 8:35AMMoonset 6:40PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 303 Pm Cst Sun Nov 19 2017
.small craft advisory in effect from Monday afternoon through Tuesday afternoon...
Tonight..West winds 15 to 20 kt becoming southwest. Mostly clear. Waves 1 to 3 ft.
Monday..Southwest winds 15 to 20 kt increasing to 30 kt. Sunny. Waves 1 to 3 ft building to 2 to 4 ft in the afternoon.
Monday night..Southwest winds to 30 kt with occasional gale force gusts to 35 kt. Mostly clear. Waves 3 to 5 ft.
Tuesday..Southwest winds to 30 kt becoming northwest in the afternoon. Partly Sunny. Waves 2 to 4 ft.
LMZ741 Expires:201711200530;;662774 FZUS53 KLOT 192103 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 303 PM CST Sun Nov 19 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>742-200530-

7 Day Forecast for Marine Location Near Elmhurst, IL
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location: 41.89, -87.94     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 192013
afdlot
area forecast discussion
national weather service chicago romeoville, il
213 pm cst Sun nov 19 2017

Short term
150 pm cst
through Monday...

high pressure is centered over the southern great plains this
afternoon with ridging extending into the upper midwest. Ridge
axis will gradually traverse the CWA this evening and tonight with
winds backing to the southwest behind. Low mid level WAA will
overspread the region after midnight tonight. Temperatures will
fall into the upper 20s outside the chicago metro late this
evening, then should hold steady through much of the overnight
hours, and may warm a degree or two in spots as WAA strengthens.

Expect highs right around 50f during the day Monday with mostly
sunny skies and breezy southwest winds on the backside of the
ridge which will settle across the tennessee valley.

Deubelbeiss

Long term
212 pm cst
Monday night through Sunday...

still relatively warmer at the start of the period with upper
level trough and surface reflection well to the north. This will
change again on Tuesday as both of these features progress across
the region, and with a colder air mass returning late Tuesday into
Tuesday night. Frontal passage on Tuesday looks to be mainly dry,
however, there is the possibility for some isolated development
later in the day. Then expect cooler and dry weather through the
end of the work week. Approaching system will allow a warmer air
mass to return along with precip chances by late Friday into the
start of the weekend.

Rodriguez

Aviation
For the 18z tafs...

high pressure will build across the region today providing
primarilyVFR conditions and a modest west to southwest breeze.

Late this morning through the afternoon, there will be few to
scattered stratocumulus around 030 but given the dry advection
into the region do not anticipate a broken deck to develop.

Otherwise just expect mid and high clouds to traverse the region.

Winds will be somewhat breezy during the day, with gusts to around
20kt. Winds will diminish this evening and back to the southwest
as the ridge axis moves through overnight. Winds will continue
out of the southwest Monday with gusts to around 20kt possible
once again from mid morning into the afternoon.

Bmd

Marine
212 pm cst
surface ridge axis has been moving across the region, with some
slight diminishing wind trend today. However, don't anticipate any
additional weakening as the start of the week will once again
remain windy. Gradient picks back up ahead of an approaching low
to the northwest. Speeds will initially pick up over the southern
portions of the lake tonight into Monday, but anticipate this
increasing trend to include the northern portions later in the day
Monday. By late Monday into Monday evening, will see gales
develop over the entire open waters and because of this, have
issued a gale watch. Some lower confidence remains with start and
end times to these gales, and will need to monitor this for a
likely later transition to a warning. Also to monitor, the
likelihood for high end gales to 45 kt and even the slight
possibility for a brief window of storm force winds. Hazardous
conditions for small craft will expand on Monday and likely
continue into mid week. There is the possibility for gales to be
observed for a time Monday night into Tuesday morning. However,
confidence is low at this time. Will include mention of gale force
gusts during this time, and continue to monitor the possibility
of more prevailing gales over the nearshore waters.

Rodriguez

Lot watches warnings advisories
Il... None.

In... None.

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

Small craft advisory... Lmz740-lmz741-lmz742... Noon Monday to 6
pm Tuesday.

Gale watch... Lmz777-lmz779... 3 pm Monday to 3 pm Tuesday.

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
OKSI2 17 mi95 min NW 2.9 36°F
FSTI2 17 mi95 min W 11 34°F
CNII2 18 mi35 min WSW 6 G 14 35°F 16°F
CHII2 - Chicago, IL 20 mi45 min W 15 G 16 35°F 15°F
JAKI2 21 mi95 min W 7 35°F
CMTI2 - 9087044 - Calumet, IL 24 mi47 min W 7 G 12 35°F 1016.5 hPa17°F
WHRI2 - Waukegan Harbor, IL 33 mi55 min W 11 G 17 34°F
BHRI3 - Burns Harbor, IN 45 mi55 min W 12 G 17 35°F 1017.6 hPa
KNSW3 - Kenosha, WI 49 mi35 min WNW 12 G 14 33°F 1016.3 hPa (-0.3)

Wind History for Calumet Harbor, IL
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Last
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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
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G19
W12
G18
W9
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1 day
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SE11
G18
SE13
G19
S12
G15
S11
G15
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G20
S9
G13
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G14
SW9
G14
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G12
S6
N2
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N11
G14
N12
G19
N9
G17
NW16
G23
N19
G27
NW24
G31
NW20
G31
NW19
G30
NW12
G18
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G22
2 days
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N9
NE6
G10
NW2
NE3
SE2
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G8
SE4
G7
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G10
S6
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SE8
G12
SE6
G9
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G13
SE9
G13
SE11
G15
SE10
G15
SE11
G18
SE12
G16
SE8
G17
S9
G12
SE10
G13
SE9
G14
S11
G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago-O'Hare International Airport, IL7 mi44 minW 1210.00 miMostly Cloudy34°F17°F50%1017.7 hPa
Chicago, Chicago Midway Airport, IL12 mi42 minWNW 11 G 1610.00 miMostly Cloudy35°F17°F48%1018.4 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL15 mi43 minW 910.00 miFair35°F16°F46%1018 hPa
Chicago / West Chicago, Dupage Airport, IL17 mi43 minW 1210.00 miFair34°F19°F54%1018 hPa
Lewis University Airport, IL21 mi40 minW 1310.00 miFair34°F21°F61%1017.9 hPa

Wind History from ORD (wind in knots)
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Last 24hrN17
G24
N16
G20
N22
G28
N17
G24
NW12
G21
NW14NW21
G24
NW11NW17
G25
NW16
G21
NW13NW14NW13NW12W10
G17
NW16
G22
NW12W14W9W13W16W12
G18
NW13W12
1 day agoS15S12S12S13S10S10SW13SW9SW7N3NE5NE4NE4N10N10N12N14N14
G22
N15
G28
N15N14
G22
NW14NW18
G24
N16
G24
2 days agoSE3NE5E5E8SE6E7SE6S5S7S7S7S9S14S11S9S11S11S16
G23
S13S16S15S16S13S17
G22

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.