Tuesday, October16, 2018 L-36.com


Marine Weather and Tides
Evanston, IL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:04AMSunset 6:08PM Tuesday October 16, 2018 8:30 PM CDT (01:30 UTC) Moonrise 2:12PMMoonset 11:53PM Illumination 50% Phase: First Quarter Moon; Moon at 7 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- 250 Pm Cdt Tue Oct 16 2018
.small craft advisory in effect through Wednesday afternoon...
Tonight..Southwest winds 20 to 30 kt through early evening, then shifting northwest 15 to 25 kt overnight. Partly cloudy. Waves 2 to 4 ft.
Wednesday..Northwest winds 20 to 25 kt. Sunny. Waves 2 to 4 ft.
Wednesday night..Northwest winds 10 to 20 kt. Mostly clear. Waves 2 to 4 ft.
Thursday..West winds 5 to 10 kt becoming southwest 10 to 15 kt in the afternoon. Sunny. Waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
LMZ741 Expires:201810170330;;285940 FZUS53 KLOT 161950 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 250 PM CDT Tue Oct 16 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>742-170330-


7 Day Forecast for Marine Location Near Evanston, IL
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location: 42.03, -87.69     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 162329
afdlot
area forecast discussion
national weather service chicago romeoville, il
629 pm cdt Tue oct 16 2018

Short term
215 pm cdt
through Wednesday...

relatively warmer, but gusty southwest winds this afternoon will
ease this evening with the approach of a cold front clipper system
to our north. Precipitation has been fairly scarce with the front
and largely confined across the upper great lakes, and any
additional precipitation will remain north and across the east
side of lake michigan. While temperatures will drop into the lower
to middle 30s, winds do remain elevated such that frost will
likely be more patchy than anything, and much less coverage
tonight compared to last night and what will be expected
Wednesday night.

Behind the front we could see some residual clouds in the morning,
but then just expect a cool and breezy day with northwest winds
in place. Highs will struggle to reach 50 in spite of the
sunshine.

Kmd

Long term
155 pm cdt
Wednesday night through Tuesday...

a blocky upper ridge is expected to persist over the pacific
northwest midweek through early next week with downstream
troughing resulting in a prolonged period of below normal
temperatures in the midwest. Several stronger shortwaves will dig
across the great lakes region through the period resulting in some
minor undulations in temps and provide a couple periods with low
precip chances.

Wednesday night into Thursday will be quiet and cool under the
influence of a broad ridge over the region. A strong shortwave is
progged to dig into the upper midwest on Friday driving a cold
front across the local area Friday evening and overnight. Breezy
southwest winds will be in place ahead of the front. Best upper
level support stays well to our north Friday, and there may
initially be dry low levels to overcome making precip timing and
intensity a bit unsure at this distance, but there is at least a
chance for scattered showers with the front on Friday.

Strong cold air advection into the region Friday night into
Saturday will help to drive steep low level lapse rates. The
combination of efficient mixing with a tight pressure gradient
over the region will result in another windy day. Forecast
soundings from the GFS show top of the channel winds of around
40kt and suggest the potential for frequent wind gusts in excess
of 30 mph. Meanwhile, a second and weaker shortwave digs across
the area on Saturday and may produce widely scattered diurnally
favored showers. High pressure builds over the region Sunday and
early Monday, but another cold front is expected to pass over the
area Monday night into Tuesday.

Deubelbeiss

Aviation
For the 00z tafs...

629 pm... Only forecast concern this period are the winds.

Southwest winds 10-15kts will slowly turn westerly this evening
and then shift northwesterly overnight as a cold front moves
across the area. There may be some periodic gusts this evening.

Speeds will increase Wednesday morning with gusts 20-25kt through
mid afternoon. Speeds gusts will diminish quickly with sunset
Wednesday evening.

There is an expansive area of 3-6kft CIGS across the upper midwest
behind the cold front. This cloud cover may spread across the area
during the overnight hours and persist through late Wednesday
morning. If bkn ovc CIGS develop... They may lower to near 3kft but
confidence is currently low. Cms

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... In nearshore waters until 10 pm
Wednesday.

Small craft advisory... Il nearshore waters until 3 pm Wednesday.

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 4 mi90 min SW 8 54°F
45174 7 mi20 min SW 9.7 G 14 56°F 58°F1 ft41°F
CHII2 - Chicago, IL 10 mi30 min WSW 19 G 21 57°F 35°F
CNII2 13 mi15 min S 6 G 9.9 54°F 32°F
JAKI2 18 mi90 min WSW 6 G 9.9 55°F
CMTI2 - 9087044 - Calumet, IL 22 mi30 min SSW 5.1 G 9.9 53°F 1016.8 hPa (+0.9)36°F
WHRI2 - Waukegan Harbor, IL 24 mi50 min WSW 8.9 G 12 54°F
45186 24 mi30 min W 7.8 54°F 54°F1 ft
45187 32 mi30 min 53°F 53°F1 ft
BHRI3 - Burns Harbor, IN 39 mi50 min SSW 8.9 G 11 54°F 1017.6 hPa
KNSW3 - Kenosha, WI 39 mi30 min SW 8 G 9.9 53°F 1015.6 hPa (+1.4)
45170 43 mi20 min WSW 19 G 27 55°F 59°F4 ft40°F
MCYI3 - Michigan City, IN 46 mi30 min S 17 G 19 52°F 33°F

Wind History for Calumet Harbor, IL
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W3
G6
W3
NW4

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi38 minWSW 510.00 miFair54°F34°F47%1017.4 hPa
Chicago, Chicago-O'Hare International Airport, IL12 mi39 minSW 910.00 miA Few Clouds54°F34°F47%1017.1 hPa
Chicago, Chicago Midway Airport, IL17 mi37 minWSW 810.00 miA Few Clouds52°F34°F50%1017.8 hPa

Wind History from PWK (wind in knots)
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Last 24hrSW3SW3CalmW3S4SW4CalmS6SW5SW6SW6SW8SW11
G17
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W6SW5
1 day agoW8NW7NW4NW7NW6NW13NW13
G17
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NW13NW12NW12NW8W9NW13
G19
NW12NW10NW13
G18
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W9
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NW11W12
G20
W9W5W3
2 days agoSW4S5S5S3NW4CalmCalmCalmS3S4CalmCalmCalmS4S10S10SW7SW7S10SW8W5W5NW7NW8

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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wmap_A
GOES Local Image of    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (21,6,7,8)
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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.