Monday, April23, 2018 L-36.com


Marine Weather and Tides
Niles, IL

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:55AMSunset 7:43PM Monday April 23, 2018 4:40 AM CDT (09:40 UTC) Moonrise 12:50PMMoonset 2:36AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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- 305 Am Cdt Mon Apr 23 2018
Today..Northeast winds around 10 kt increasing to 10 to 20 kt. Partly Sunny. Waves 1 to 3 ft building to 2 to 4 ft.
Tonight..Northeast winds 10 to 15 kt. Slight chance of showers. Waves 1 to 3 ft.
Tuesday..North winds around 10 kt. Chance of showers. Waves 1 to 3 ft.
Tuesday night..North winds 10 to 15 kt increasing to 30 kt. Mostly cloudy. Waves 1 to 3 ft building to 4 to 7 ft occasionally to 9 ft after midnight. A small craft advisory will likely be needed.
LMZ741 Expires:201804231530;;367817 FZUS53 KLOT 230805 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 305 AM CDT Mon Apr 23 2018 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>742-231530-

7 Day Forecast for Marine Location Near Niles, IL
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location: 42, -87.81     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 230809
afdlot
area forecast discussion
national weather service chicago romeoville, il
309 am cdt Mon apr 23 2018

Short term
306 am cdt
through tonight...

low-impact weather is expected through tonight as dry low-level
easterly flow continues while an upper-level low near the ms oh
river confluence meanders along the ky tn line. Overall conditions
today should be rather similar to what was observed on Sunday for
most the area, with a bit more mid to upper-level cloud cover
expected today.

The ongoing rain across southern il will begin to dissipate as it
encounters the very dry low-levels across the north half of il
today. Top-down saturation may allow for some isolated to scattered
showers to gradually spread into the southern CWA this afternoon and
the remainder of the CWA through the night. Guidance appears to be a
bit aggressive with the northward extent of this precip in terms of
coverage given the antecedent dry air mass. Overall expectation is
for isolated, low-qpf showers, with much of the area remaining dry
through the period.

Kluber

Long term
306 am cdt
Tuesday through Sunday...

Tuesday through Wednesday night: the approach of mid-level troughing
over the upper ms river valley should allow for a slightly better
chance of low-qpf showers across the CWA on Tuesday when compared to
tonight. Still, coverage should be isolated, with only a few being a
heavy enough to wet the ground. Any showers will shift east from the
cwa during the night. A dry, cool, and somewhat breezy day is
expected for Wednesday, with just diurnal cumulus and some passing
high clouds.

Thursday through Friday: upper-troughing originating from western
canada will shift SE across the upper ms river valley on Thursday
and the western great lakes Thursday night into Friday. An
associated band of scattered showers is expected to cross the cwa
late Thursday night through Friday afternoon.

Saturday and Sunday: cool but dry conditions will prevail on
Saturday under NW flow behind the departing trough. An approaching
ridge will cross the region on Sunday, bringing a seasonable and
mostly sunny late april day to the area.

Kluber

Aviation
For the 06z tafs...

ridge of high pressure will remain over the great lakes while an
upper low very slowly meanders northward along the mid mississippi
valley. Persistent northeast wind will be in place through the taf
period with a slight diurnal uptick above 10 kt.VFR conditions
and dry weather will prevail under the influence of the high, but
late Monday evening into the overnight hours, moisture wrapping
around the upper low will reach northwest indiana and possibly
northeast illinois reducing ceilings to MVFR and resulting in a
few scattered showers and sprinkles. Gyy has the best chance for
any precip, but only enough confidence to include a prob30 at this
time. Will include only a vcsh at the remaining chicago-land
terminals.

Bmd

Marine
306 am cdt
ridge of high pressure will remain over the central and northern
portions of lake michigan over the next couple days while a moderate
to fresh northeasterly breeze will be in place across the south half
of the lake. A cold front will move down the lake Tuesday night with
north wind gusts increasing to around 30 kt. Moderate north flow
will continue much of the day Wednesday, but should very gradually
diminish as ridge of high pressure builds across the region. Winds
swing around to the south southwest on Thursday behind the ridge
axis, but another cold front will sweep down the lake Thursday night
bringing another period of northerly winds gusting to around 30 kt.

Bmd

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 9 mi100 min NNE 8 44°F
OKSI2 12 mi100 min ESE 1 G 2.9 46°F
CHII2 - Chicago, IL 14 mi40 min NE 8 G 8.9 44°F 31°F
CNII2 15 mi25 min N 6 G 8 43°F 29°F
JAKI2 20 mi100 min NNE 8 G 9.9 44°F
CMTI2 - 9087044 - Calumet, IL 24 mi40 min N 6 G 8 42°F 1022.1 hPa (-1.0)33°F
WHRI2 - Waukegan Harbor, IL 25 mi60 min NNE 8.9 G 11 44°F
KNSW3 - Kenosha, WI 41 mi40 min 41°F 1024 hPa (-0.4)
BHRI3 - Burns Harbor, IN 43 mi59 min ENE 6 G 8 45°F 1023 hPa

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago-O'Hare International Airport, IL5 mi50 minNE 710.00 miMostly Cloudy46°F26°F46%1022.7 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL9 mi49 minNNE 410.00 miFair42°F30°F62%1023.8 hPa
Chicago, Chicago Midway Airport, IL15 mi48 minENE 710.00 miMostly Cloudy46°F26°F46%1022.7 hPa
Chicago / West Chicago, Dupage Airport, IL24 mi49 minNNE 610.00 miFair38°F30°F73%1022.6 hPa

Wind History from ORD (wind in knots)
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Last 24hrE6N7NE7E6E6E8E12E13E14E13NE11NE14
G20
NE12NE12NE10NE10NE10NE8NE10NE7NE6NE5NE7NE7
1 day agoCalmCalmE3E3CalmCalmCalmNE33N5N4E7E8E8E8E6E6E4N6E4CalmNE6NE8E4
2 days agoW3NW5CalmN4N4SE3Calm3E5CalmE3E7E11E12E9E7E5E3E3CalmE3CalmCalmE3

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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GOES Local Image of Midwest    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (5,6,7,8)
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Ground Weather Radar Station Chicago, IL
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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.