Sunday, July22, 2018 L-36.com


Marine Weather and Tides
Winnetka, IL

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Sunrise 5:33AMSunset 8:20PM Sunday July 22, 2018 11:25 AM CDT (16:25 UTC) Moonrise 4:10PMMoonset 1:43AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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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LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 942 Am Cdt Sun Jul 22 2018
.small craft advisory in effect through this evening...
Rest of today..North winds 15 to 25 kt. Scattered showers. Waves 4 to 7 ft occasionally to 9 ft.
Tonight..North winds 10 to 20 kt becoming northwest 10 to 15 kt after midnight. Chance of showers in the evening. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft after midnight.
Monday..North winds 10 to 15 kt. Mostly Sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon.
Monday night..North winds 5 to 10 kt becoming west after midnight. Mostly clear. Waves 1 to 3 ft.
LMZ740 Expires:201807222115;;877916 FZUS53 KLOT 221442 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 942 AM CDT Sun Jul 22 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>742-222115-

7 Day Forecast for Marine Location Near Winnetka, IL
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location: 42.11, -87.74     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 221123
afdlot
area forecast discussion
national weather service chicago romeoville, il
623 am cdt Sun jul 22 2018

Short term
253 am cdt
through tonight...

main focus for the short term forecast period will continue to be
the impacts of an unseasonable upper low slowly tracking to the
upper ohio valley.

The low pressure system was located over southern lake michigan.

Upper low that has been responsible for the unseasonably cool and
showery conditions in now east of the local area and dropping into
the upper ohio valley. The upper level pattern continues to be
slowly progressive with upper ridging building toward the
mississippi valley while the upper low remains nearly stationary,
while becoming more expansive as a series of weak shortwaves are
absorbed into the main circulation. The local area will remain
under deep layer northerly flow through tonight, keeping the chances
for occasional light showers across the region. While there will
likely be more dry time than wet, scattered light showers will be
possible through the day. As the upper ridge gradually builds ewd,
the pcpn potential will end from west to east overnight with
decreasing cloud cover as well. High temperatures will remain
unseasonably low, with highs in the upper 70s. Lowest temperatures
will continue to be near lake michigan, where north winds off of the
lake will keep highs only in the lower to middle 70s. Lows tonight
will be in the lower 60s.

Long term
253 am cdt
Monday through Saturday...

the long term forecast period will, generally, be quiet, with dry
weather and more seasonable temperatures. Upper ridging will
continue to build across the region through mid-week. Temperatures
for Monday through mid-week should be closer to normal, with highs
in the lower to middle 80s. An upper low is expected to move into
the upper great lakes region by Thursday, setting up broad upper
troughing over the ERN 2 3 of the conus. This will likely lead to a
cooling trend toward the end of the week and into next weekend.

Aviation
For the 12z tafs...

forecast concerns how long ifr CIGS will last this morning and
continued scattered showers.

Showers continue to stream southeastward into NE il and NW in on
the back side of low pressure across the ohio valley. Showers do
reduce vis to as low as 3sm, but these reductions do not last
very long. The best convergence is across NW in where a better
chance exists for stronger showers, though expect a continued
expansion of rain and ifr CIGS in the 11z-15z period. There could
be a few lightning strikes over the lake this morning, then
across NW in in afternoon. Ceilings are the lowest at the shore
and inland to ord mdw. Ceilings have generally been at 800 feet or
higher, and while there is a low chance that ceilings dip a bit
more briefly. Confidence on timing the lifting to MVFR is medium.

Guidance still contends the farther inland sites will generally
hold MVFR though still feel a period of ifr is possible farther
inland too. Better chances for showers at ord mdw will be through
midday. Expect this afternoon most locations will lift toVFR.

North winds will continue to drift to more northeast, maintaining
speeds of 10-15 kt and gusts to around 20 kt through the daytime
hours. Expect a decent ramp down tonight.

Kmd

Marine
335 am cdt
main concerns center around continued northeast winds
today and how long waves will take to subside across southern lake
michigan. Low pressure over the ohio river valley will linger
there today and then gradually sink south and weaken tonight.

Northeast winds will continue on the back side of the low through
the day. These winds will maintain higher waves, and thus the
small craft advisory will remain in effect through the afternoon
for all of the nearshore waters. Scattered showers and possibly a
thunderstorm or two will continue through tonight. There is a
slight chance for waterspouts through Sunday morning, particularly
over the southern half of the lake. Winds will begin to gradually
diminish through the day as high pressure builds into the upper
midwest. Winds will slowly ease Monday into Tuesday as the high
shifts into the western great lakes.

A weak wind pattern will then be in place through midweek, before
a cold front arrives on Wednesday night. Expect some storms ahead
of the front, then gusty west winds behind the front for the
latter half of the week.

Kmd

Lot watches warnings advisories
Il... Beach hazards statement... Ilz006-ilz014 until 10 pm Sunday.

In... Beach hazards statement... Inz001-inz002 until 10 pm Sunday.

Lm... Small craft advisory... Nearshore waters
until 5 pm Sunday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45174 5 mi25 min N 14 G 18 70°F 69°F5 ft70°F
FSTI2 10 mi85 min NNW 20 67°F
CHII2 - Chicago, IL 16 mi35 min NNE 15 G 16 71°F 70°F
45177 16 mi145 min 65°F1 ft
WHRI2 - Waukegan Harbor, IL 18 mi45 min N 16 G 21 69°F
CNII2 19 mi25 min NNW 8.9 G 17 69°F 66°F
JAKI2 24 mi85 min N 11 G 17 68°F
45187 26 mi25 min 16 G 18 68°F 66°F3 ft
CMTI2 - 9087044 - Calumet, IL 28 mi43 min NNW 9.9 G 14 69°F 1010.5 hPa69°F
KNSW3 - Kenosha, WI 33 mi25 min N 15 G 17 68°F 1011.9 hPa (+0.7)
BHRI3 - Burns Harbor, IN 45 mi45 min NE 8.9 G 11 71°F 1011.2 hPa
45170 48 mi25 min NE 12 G 16 71°F 70°F5 ft69°F

Wind History for Calumet Harbor, IL
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SE12
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL8 mi33 minN 810.00 miOvercast71°F69°F94%1011.8 hPa
Chicago, Chicago-O'Hare International Airport, IL12 mi34 minN 136.00 miFog/Mist70°F66°F90%1011.1 hPa
Chicago, Chicago Midway Airport, IL22 mi32 minN 92.00 miRain Fog/Mist70°F69°F97%1010.2 hPa
Chicago/Waukegan Regional Airport, IL23 mi30 minNNE 8 G 164.00 miFog/Mist69°F69°F100%1010.9 hPa

Wind History from PWK (wind in knots)
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Last 24hrN8
G19
NW95N7NE7NE9N11
G20
N13N8N9N8N9N8N9N9N6N6N8N8N9N8N9N10N8
1 day agoS7SW12SW8
G16
W8W7W10
G17
NW10
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W9W9W6W5NW6NW5NW8NW7NW9NW8N7N6N9N8N12
G18
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2 days agoS11S13S12
G22
S12S10S12SW8S6S10SE7S9SE16
G20
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G20
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G26
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S16S11S10
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S10S10SW8S12
G18
S9

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    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.
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Wind Forecast for Chicago, IL (12,3,4,5)
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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.