Saturday, April21, 2018 L-36.com


Marine Weather and Tides
North Riverside, 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 5:58AMSunset 7:40PM Saturday April 21, 2018 4:44 AM CDT (09:44 UTC) Moonrise 10:39AMMoonset 12:50AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 301 Am Cdt Sat Apr 21 2018
Today..East winds around 5 kt becoming northeast 5 to 10 kt in the early afternoon. Isolated sprinkles this morning. Waves around 1 ft.
Tonight..Northeast winds 5 to 10 kt. Mostly cloudy. Waves around 1 ft.
Sunday..Northeast winds 10 to 15 kt increasing to 10 to 20 kt in the afternoon. Mostly Sunny. Waves 1 to 2 ft building to 2 to 4 ft late in the afternoon.
Sunday night..Northeast winds 10 to 15 kt. Partly cloudy. Waves 2 to 4 ft early subsiding to 1 to 3 ft.
LMZ741 Expires:201804211545;;271046 FZUS53 KLOT 210801 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 301 AM CDT Sat Apr 21 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>742-211545-

7 Day Forecast for Marine Location Near North Riverside, IL
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location: 41.84, -87.82     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 210728
afdlot
area forecast discussion
national weather service chicago romeoville, il
228 am cdt Sat apr 21 2018

Short term
224 am cdt
through tonight...

high pressure will remain over the central and eastern great
lakes today and tonight resulting in fair weather and a light
easterly breeze across northern illinois and northwest indiana. To
our west, baroclinic leaf is noted on satellite imagery with
cloud cover increasing across the local area as this feature
slowly shifts east across the great plains today. GFS continues to
develop a narrow corridor of light precipitation today, and now
the NAM and several high-res models have joined the GFS camp.

Forcing is not overly impressive, mainly in the form of broad
diffluence aloft in advance of the upper low to our west and
modest compact shortwave. Meanwhile, very dry antecedent
conditions are in place. 00z kdvn RAOB recorded 0.21 inches pwat
and shows very dry conditions below 500mb. No low mid level
moisture advection into the region is expected under the influence
of the 850mb high pretty much overhead through the morning, so
would anticipate the dry layer will be very hard to overcome. May
see some echoes on radar but think most precip would evaporate
before reaching the ground. Mid-high level lapse rate are poor,
which should prevent any convection. At most, perhaps a few high
based sprinkles will be possible, but likely not enough to fully
wet the ground. Will carry silent 10-14 pops today and introduce a
slight chance for some sprinkles. Cloud cover will limit mixing
this afternoon and likely trim a couple degrees from our high
temps compared to yesterday, but still expect near seasonable
warmth this afternoon with highs in the mid to upper 50s. Onshore
flow will keep temperatures in the 40s near the lake michigan
shores.

Deubelbeiss

Long term
224 am cdt
Sunday through Saturday...

quiet weather is expected to continue Sunday into Monday as
mid upper closed low moves from the central great plains to the
tennessee valley. Expect the local area to fall on the northern
periphery of the clouds from this system, but dry weather will
prevail with temperatures expected to be near the seasonal norms.

Upper low will meander north towards the ohio valley Tuesday and
some models show areas east of the i-57 corridor getting some
light rain on Tuesday. Meanwhile, another disturbance is progged
to dig from the northern plains Tuesday across the mid mississippi
valley late Wednesday. More widespread showers appear possible
somewhere in the region, but there are large discrepancies in
location, so for now will maintain slight chance low chance pops
Tuesday night into Wednesday.

Yet another wave takes aim on the area late in the week with a
more organized cold front expected to sweep across the region
Thursday night bringing another chance for showers. Looks like
only a glancing blow of cooler temps will occur Friday then
temperatures moderate again by Saturday. Broad upper troughing
sets up behind the front over the great lakes next weekend so the
cold air won't be too far away next weekend.

Deubelbeiss

Aviation
For the 06z tafs...

surface high pressure will continue to prevail over the local
airports today, keeping winds mainly light apart from a lake
influence into the chicago sites. This should push northeast
winds this afternoon to 7-8 kt, maybe sporadically higher.

Mid cloud will thicken by mid-morning with likely virga. Cannot
rule out patchy sprinkles today, but the very dry low-levels
should prevent any light showers.

Mtf

Marine
101 am cdt
continued quiet weather over lake michigan through Monday night
with high pressure prevailing. This will present a variable wind
direction at times but with minimal speeds. A cold front will move
southward across the lake during or around Tuesday night bringing
northerly winds in its wake. This may present small craft
advisory criteria conditions in the illinois and indiana
nearshores into Wednesday.

Mtf

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
CNII2 11 mi29 min NNE 1 G 2.9 41°F 18°F
OKSI2 12 mi104 min ESE 2.9 G 5.1 46°F
FSTI2 13 mi104 min N 5.1 38°F
CHII2 - Chicago, IL 14 mi44 min NNW 1.9 G 1.9 39°F 24°F
JAKI2 14 mi104 min NE 1.9 G 2.9 41°F
CMTI2 - 9087044 - Calumet, IL 17 mi44 min N 1.9 G 2.9 38°F 1030 hPa (-0.4)31°F
WHRI2 - Waukegan Harbor, IL 36 mi64 min NE 1.9 G 1.9 37°F
BHRI3 - Burns Harbor, IN 38 mi64 min E 6 G 8 43°F 1030.8 hPa
MCYI3 - Michigan City, IN 49 mi44 min ENE 2.9 G 4.1 41°F 13°F

Wind History for Calumet Harbor, IL
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Last
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W3
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E9
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N16
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N15
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N14
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL5 mi51 minE 310.00 miOvercast43°F19°F40%1031 hPa
Chicago, Chicago-O'Hare International Airport, IL11 mi53 minE 310.00 miOvercast41°F21°F47%1030.6 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi52 minN 010.00 miFair37°F26°F65%1031.5 hPa
Lewis University Airport, IL22 mi69 minE 610.00 miFair43°F19°F39%1030.5 hPa
Chicago / West Chicago, Dupage Airport, IL24 mi52 minE 310.00 miFair42°F17°F36%1030.5 hPa

Wind History from MDW (wind in knots)
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Last 24hrCalmCalmCalmNE5CalmSE3CalmCalmE8NE8NE10E12E10E13E9E6E4E4E4E4E5E4E4E3
1 day agoN10N10N11N10N10N10N10N11N11N10NE12NE11N9NE8N9NE8N5NW6NW7W3CalmCalmCalmW3
2 days agoE4E5E8E12E15E17E17
G22
NE17
G21
NE17
G25
NE14NE10NE13N8N8N7NW5NW9NW8NW10NW10NW9N7N10N9

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 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

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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.