Tuesday, July17, 2018 L-36.com


Marine Weather and Tides
Joliet, IL

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:32AMSunset 8:25PM Tuesday July 17, 2018 12:56 AM CDT (05:56 UTC) Moonrise 10:53AMMoonset 11:42PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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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LMZ742 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 906 Pm Cdt Mon Jul 16 2018
Rest of tonight..Northwest winds 10 to 20 kt. Clear. Waves 1 to 3 ft building to 2 to 4 ft toward daybreak.
Tuesday..North winds 10 to 20 kt. Sunny. Waves 2 to 4 ft.
Tuesday night..Northeast winds 10 to 15 kt. Mostly clear. Waves 2 to 4 ft.
Wednesday..East winds 5 to 10 kt. Sunny. Waves 1 to 3 ft.
LMZ742 Expires:201807171030;;593533 FZUS53 KLOT 170206 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 906 PM CDT Mon Jul 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>742-171030-

7 Day Forecast for Marine Location Near Joliet, IL
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location: 41.52, -88.16     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 170529
afdlot
area forecast discussion
national weather service chicago romeoville, il
1229 am cdt Tue jul 17 2018

Short term
227 pm cdt
through Tuesday...

a rather chaotic set-up is ongoing across much of the CWA this
afternoon with multiple boundaries outflows resulting in scattered
convection.

Broad troughing over the upper great lakes is supporting an unstable
environment with weak background forcing across the cwa. Meanwhile,
a pseudo cold front from approximately waukegan to near la salle has
become poorly defined after various bouts of convection along it
over the past couple hours. Also, an outflow-enhanced lake breeze
continues to drift westward across the chicago metro. Scattered
convection is expected to continue for another couple hours before
gradually diminishing toward sunset. A couple storms have exhibited
gusty winds due to precip loading and sufficient dcape, but with so
many boundaries and minimal shear, storm maintenance has been fairly
poor. No severe weather is expected with the rest of the activity
this afternoon.

A distinct moisture boundary exists from the quad cities, to near
rockford to near milwaukee as of 19z. Dew points drop into the upper
50s and the cumulus field dissipates behind this boundary. Expect
this boundary to reach the NW chicago metro around 5pm, the se
chicago metro around 8pm, and the far SE CWA near midnight cdt.

Gusty NW nnw winds of 15 to 20 mph may follow this boundary for a
couple hours.

Other than some afternoon cumulus on Tuesday, dry weather and clear
skies are expected for Tuesday. Expect cooler and less humid
conditions, with temps generally in the low 80s and dew points in
the low 60s, respectively. Gusty N winds to 20 mph and waves of
3-6 ft will support a high swim risk for the beaches of NW indiana
through the day Tuesday. Slightly onshore winds for the il beaches
will result in a moderate swim risk. Portions of southern cook
county may need to be upgraded to a high swim risk if wave
conditions warrant by Tuesday morning.

Kluber

Long term
205 pm cdt
Tuesday night through Monday...

fair weather will be on tap Tuesday night into Wednesday as high
pressure builds across the region with less warm and humid
conditions expected behind Tuesday's cold front. Surface ridge
will shift to the eastern great lakes Thursday and return flow
will allow dew points to creep back into the mid to upper 60s
later Thursday and to around 70 by Friday. Meanwhile, an upper
level disturbance over the pacific northwest this afternoon is
progged to deepen into a closed low over the northern great plains
Wednesday and shift into the upper midwest Thursday. Global models
are starting to come into better agreement with timing and track
of the 500mb low into the upper midwest by midday Thursday.

Models also in reasonably agreement indicating a couple shortwave
troughs ejecting out ahead of the main upper low during the day
Thursday which will provide at least some chance for showers and
thunderstorms later in the day. There will be additional chances
on Friday as the main upper low shifts across the western great
lakes and over the weekend as pin-wheeling vort lobes wrap around
the back side of the low.

Bmd

Aviation
For the 06z tafs...

high pressure will continue to build across the area today,
resulting in dry andVFR conditions this forecast period. Pattern
supporting a light northwest wind, which will gradually become
more northerly today as this high settles in place. Locations near
the lake will feel the influence of the lake later this morning
and midday, as winds will become more north northeast.

Rodriguez

Marine
205 pm cdt
a cold front is moving across lake michigan this afternoon
leaving generally northwest to north flow in its wake. Across the
south end of the lake, lake breezes have developed resulting in
onshore flow and there are some areas where winds have been
disturbed from outflow from thunderstorms. These areas should
trend towards the northwest by mid to late this evening as
synoptic flow increases. A more vigorous front will move south
across the lake overnight with north winds picking up into the
20-25 kt range with a few gusts to 30 kt possible behind the
second front. Moderate north flow will continue through the day
Tuesday then should gradually diminish Tuesday evening and
overnight as high pressure builds across the western great lakes.

Light flow over the lake Wednesday will allow afternoon lake
breezes to develop, then southerly flow returns behind the ridge
axis Thursday. South winds are expected to increase into the 20-30
kt range late Thursday into early Friday as low pressure lifts
across the upper midwest.

Bmd

Lot watches warnings advisories
Il... None.

In... Beach hazards statement... Inz001-inz002 until 7 pm Tuesday.

Lm... Small craft advisory... In nearshore waters until 7 pm Tuesday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JAKI2 36 mi116 min Calm G 1 75°F
CMTI2 - 9087044 - Calumet, IL 36 mi38 min NW 1 G 1.9 73°F 1015.1 hPa73°F
CNII2 37 mi26 min NW 4.1 G 9.9 76°F 60°F
45177 39 mi116 min 75°F
CHII2 - Chicago, IL 41 mi36 min NW 6 G 6 77°F 70°F
FSTI2 42 mi116 min W 6 75°F
BHRI3 - Burns Harbor, IN 54 mi51 min Calm G 4.1 75°F 1015.9 hPa

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Joliet Regional Airport, IL1 mi81 minN 010.00 miFair74°F59°F61%1015.6 hPa
Lewis University Airport, IL7 mi81 minN 310.00 miFair71°F57°F63%1015.9 hPa
Morris Muni-James R Washburn Field Airport, IL15 mi81 minN 010.00 miFair65°F62°F92%1015.6 hPa
Aurora Municipal Airport, IL24 mi64 minNW 510.00 miFair65°F61°F87%1015.6 hPa

Wind History from JOT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmN3CalmCalmW5W6W6W5NW3NW7W5
G14
E3CalmN8
G16
N4N4N5CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4SW4SW3SW6SW6S4SW4CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmS3CalmCalmCalmSE4SE3S3CalmSE7E3SE5S6SE6S3CalmCalmE4SE3CalmCalmCalm

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (1,6,7,8)
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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.