Tuesday, August20, 2019 L-36.com
Home Articles Used Sail
Search		 Soft
Shackles		 Reference Manuals Racing Sources L-36.com
Weather		 Weather &
Tide Index		 Glossary+ L-36 Fleet Contact


Marine Weather and Tides
Joliet, IL

Version 3.4 		NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
Sunrise 6:05AMSunset 7:47PM Tuesday August 20, 2019 7:20 PM CDT (00:20 UTC) Moonrise 10:30PMMoonset 10:47AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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
    EDIT      (on/off)   Help
LMZ742 Expires:201908210315;;945369 Fzus53 Klot 201957 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 257 Pm Cdt Tue Aug 20 2019 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>742-210315- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 257 Pm Cdt Tue Aug 20 2019
Tonight..Variable winds less than 10 kt becoming west 5 to 10 kt late this evening. Patchy fog after midnight. Slight chance of showers late. Waves 1 ft or less.
Wednesday..Northwest winds 10 to 15 kt becoming north 10 to 20 kt in the afternoon. Patchy fog in the morning. Slight chance of showers through the day. Waves 1 to 3 ft building to 2 to 4 ft in the afternoon.
Wednesday night..North winds 10 to 15 kt. Mostly cloudy. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight.
Thursday..Northeast winds 10 to 20 kt. Mostly Sunny. Waves 1 to 3 ft.
LMZ742

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

Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klot 202355
afdlot
area forecast discussion
national weather service chicago romeoville, il
655 pm cdt Tue aug 20 2019

Short term
253 pm cdt
through Wednesday night...

mesolow continues to progress eastward through the area this
afternoon. It is very moist, with some instability aloft still
present such that we expect showers and isolated thunderstorms to
continue through late afternoon before ending.

High pressure will nose in from the west this afternoon and
evening, and thus expect continued clearing ahead of a cold front
across the upper midwest. With the moist conditions in place and
weak flow, expect that there will be fog tonight. It could be
dense in some areas.

The forcing near the front to our north passes well north such
that most of the overnight precip should stay out of the area,
though some lighter precip could occur ahead of it in the
morning early afternoon, with the better chance for some isolated
ts across northwest indiana. Meanwhile, additional convection
will fire to our west along the southern extension of the boundary
across the plains overnight. As additional energy spreads in from
the west, some of this may sneak into our south and west counties
in the late morning or the afternoon also. We do not think
coverage will be too widespread tomorrow, but with these multiple
though weaker forcing mechanisms will require us to carry some
lower chance precip chances.

Kmd

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

a pattern change is on the horizon for the latter part of the
week, one featuring drier air and more settled sensible weather.

First for Wednesday night as a trough digs in eastern canada, a
cold front will be working southward through the region. A short
wave will be translating the strengthening mid- to upper-level
flow around the trough. This looks to serve as some focus for
mid-level ascent along the baroclinic zone at least across the
southern forecast area and possibly further north depending on
the impulse track. The precipitation with this should be mainly
 showers with a lower lightning threat, especially any lingering
activity into early Thursday. As the pressure gradient increases
Thursday afternoon south of an incoming canadian surface high to
the north, the northeast winds will increase especially over the
lake. There is potential for a heightened rip current risk
because of this into early Friday. Otherwise these winds will
steer in lower dew points on Thursday night resulting in a dry,
cooler feel for Friday.

The surface high that builds into the eastern great lakes will be
sprawling and may keep the area dry all the way through Monday.

The GFS does indicate a small chance of some showers Sunday, but
the next decent synoptic signature in long range guidance is not
until Monday night into Tuesday, and the GFS ensemble generally
supports this too. Highs in the warm advection regime ahead of
this front could reach into the upper 80s on Monday.

Mtf

Aviation
For the 00z tafs...

a convectively-induced low pressure currently near ord mdw gyy will
shift SE this evening, allowing light W winds to prevail mid-evening
through the night. Mostly clear skies should allow for some br
formation at all sites overnight, more so outside of the core of the
chicago heat island (dpa gyy rfd). Confidence on br formation is
fairly high, but confidence on the range of visibility is low.

A cold front will then shift SE across the area by mid-morning
Wednesday, clearing out the br but leaving MVFR ceilings in its
wake. There is a potential for some ifr ceilings at rfd and dpa with
the br and for a short period after the frontal passage. By late
Wednesday afternoon, large-scale winds may veer far enough north to
allow a lake-enhanced boundary to expand westward into
ord mdw gyy.

Kluber

Lot watches warnings advisories
Il... None.

In... None.

Lm... None.

Visit us at http: weather.Gov chicago (all lowercase)
follow us on facebook... Twitter... And youtube at:

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
JAKI2 36 mi141 min SSE 5.1 G 8.9 76°F
CMTI2 - 9087044 - Calumet, IL 36 mi51 min S 5.1 G 6 75°F 1012.2 hPa69°F
CNII2 37 mi21 min SE 1.9 G 7 73°F 69°F
45177 39 mi141 min 76°F1 ft
OKSI2 39 mi141 min SE 1.9 G 2.9 75°F
CHII2 - Chicago, IL 41 mi31 min S 8.9 G 9.9 75°F 74°F
FSTI2 42 mi141 min Calm 75°F
BHRI3 - Burns Harbor, IN 54 mi41 min S 4.1 G 6 75°F 1013.2 hPa

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
7
PM		8
PM		9
PM		10
PM		11
PM		12
AM		1
AM		2
AM		3
AM		4
AM		5
AM		6
AM		7
AM		8
AM		9
AM		10
AM		11
AM		12
PM		1
PM		2
PM		3
PM		4
PM		5
PM		6
PM
Last
24hr		NE4
N2
N3
N2
--
N2
SW2
S2
S3
S2
S4
S6
S4
SW4
SW5
S5
SW2
S5
SW4
W1
SW1
G5
NE7
E2
SE7
G11
1 day
ago		SW6
G10
SW3
G6
SW4
G7
SW3
S3
S1
SW1
S1
SW2
SW2
SW2
G5
SW2
SW1
SW1
NE4
NE4
NE7
NE8
NE8
NE6
NE6
NE6
G9
NE5
NE5
2 days
ago		S4
G8
S6
G10
SW4
S4
S4
SW2
S4
SE3
S3
S1
SE2
S7
G10
S9
S8
W4
G10
--
N3
G7
S7
G11
SE13
G19
SW6
G17
SW2
G9
SW5
G8
SW5
G13
SW4
G11
Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Joliet Regional Airport, IL1 mi66 minN 610.00 miMostly Cloudy76°F69°F81%1012.9 hPa
Lewis University Airport, IL7 mi66 minN 010.00 miFair74°F66°F76%1013.2 hPa
Morris Muni-James R Washburn Field Airport, IL15 mi66 minN 010.00 miPartly Cloudy74°F68°F81%1012.9 hPa
Aurora Municipal Airport, IL24 mi89 minNW 510.00 miA Few Clouds74°F64°F71%1012.7 hPa

Link to 5 minute data for KJOT

Wind History from JOT (wind in knots)
8
PM		9
PM		10
PM		11
PM		12
AM		1
AM		2
AM		3
AM		4
AM		5
AM		6
AM		7
AM		8
AM		9
AM		10
AM		11
AM		12
PM		1
PM		2
PM		3
PM		4
PM		5
PM		6
PM		7
PM
Last 24hrCalmCalmCalmS5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW10
G28		SE8CalmNE3SE6S4N6N6
1 day agoW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3CalmCalmSW3SE3S4CalmCalm
2 days agoS3CalmCalmCalmCalmCalmCalmCalmCalmE3SE5SW10
G19		SE6S6NW3CalmE4S8S11
G15		W3W4W6W5W6
Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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 (20,4,5,8)
      (on/off)   Help
Ground Weather Radar Station Chicago, IL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google
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.