Friday, August23, 2019 L-36.com


Marine Weather and Tides
Justice, 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 6:06AMSunset 7:41PM Friday August 23, 2019 5:46 AM CDT (10:46 UTC) Moonrise 12:00AMMoonset 1:51PM Illumination 46% Phase: Third Quarter Moon; Moon at 23 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:201908231530;;072498 Fzus53 Klot 230802 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 302 Am Cdt Fri Aug 23 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>742-231530- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 302 Am Cdt Fri Aug 23 2019
.small craft advisory in effect through late tonight...
Today..Northeast winds 15 to 20 kt. Sunny. Waves 3 to 6 ft occasionally to 8 ft.
Tonight..Northeast winds 10 to 20 kt becoming east after midnight. Mostly clear. Waves 3 to 6 ft occasionally to 8 ft.
Saturday..East winds 10 to 20 kt. Sunny. Waves 3 to 5 ft early in the morning subsiding to 2 to 4 ft.
Saturday night..East winds 10 to 20 kt becoming southeast after midnight. Mostly clear. Waves 2 to 4 ft.
LMZ742


7 Day Forecast for Marine Location Near Justice, IL
   Hourly   EDIT   Help
location: 41.75, -87.84     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klot 231030
afdlot
area forecast discussion
national weather service chicago romeoville, il
530 am cdt Fri aug 23 2019

Short term
212 am cdt
through tonight...

pleasant and quiet apparent weather for the area today, although
breezy northeast winds near lake michigan will continue dangerous
swimming conditions due to high waves and rip currents.

Satellite water vapor imagery this morning reveals subsidence
and drying in the mid and even lower levels moving in over the
lower great lakes from the north. Resulting surface high pressure
of 1025 mb over central ontario this morning will gradually expand
southward through the day. Much of the CWA and lake michigan will
remain in the gradient around this, with a tightened clockwise
flow and thus northeast winds with occasional gusts to 20 mph.

Near the lake front, the sustained winds at times will approach 20
mph, and these will help to sustain the ongoing high wave action.

While this is not to the level of lakeshore flooding, some higher
waves can cause dangers for those walking near the lakeshore. The
perpendicular flow to much of the shore will continue the rip
current risk and wind direction and speed look enough for this
threat to go into this evening. There may be a brief lull late
this morning in wave action due to slightly veered winds, but that
looks temporary.

Otherwise today should realize high temperatures at or a couple
degrees below yesterday given the cold advection at the top of the
mixed layer that has occurred in the past 12 hours and will
continue through midday. With a clear sky by tonight and weakening
flow, though maybe not completely calm until late, low
temperatures look to drop into the lower 50s in outlying areas and
suspect a few of the typical cool spots touch upper 40s.

Mtf

Long term
321 am cdt
Saturday through Thursday...

a large, sprawling area of surface high pressure will be centered
over the upper great lakes region Saturday morning and will slowly
slide east, centered over new england by Sunday morning. Conditions
across the local area will be unseasonably cool and dry, with highs
on Saturday in the middle to upper 70s and upper 70s to lower 80s
for Sunday. Given the continental-polar origin of the associated air
mass, dewpoints will also be relatively low, mainly in the middle
50s. Overall, this is expected to result in pleasant weather with
ample across the area.

For Sunday night and into early next week, the longer range model
guidance remains in good agreement with a well defined southern
stream shortwave lifting through the missouri valley and into
central illinois late Sunday night and Monday morning and lift
across southern lake michigan and into lower michigan Monday night.

Also, a northern stream short wave is expected to track across
northern plains canadian border area while dragging a cold front
across the upper mississippi valley. During this period from Sunday
night through Tuesday, the large sfc high will move off the new
england coast. This will set up a period of unsettled weather
across the region, with periods of showers and thunderstorms
expected as a return flow of deep layer moisture sets up as the sfc
high moves east and the double-barreled system approaches from the
west and crosses the region. Conditions should settle down as the
system moves off to the east and high pressure builds out of the
central plains and across the middle mississippi valley. Another
northern stream shortwave rotating around the base of a deep upper
low expected to develop over central canada by mid week could bring
the next chance for some scattered showers or thunderstorms for
Wednesday afternoon into Wednesday night.

Aviation
For the 12z tafs...

for the chicago area tafs today the main story is northeast
winds, with high confidence in these being 10+ kt from 14z-01z.

High pressure gradually building into the upper great lakes will
continue to result in northeast winds over the area. Early this
morning there is 20 kt flow just 2,000 ft aloft per radar vwp.

This is indication there will very likely be some gusts to that
magnitude especially mid-late morning as mixing ensues and before
that channel of winds eases in speed some. There will be
fluctuation in wind direction between mainly 030 and 060 degrees
at chicago airports today. Winds will gradually ease in the 00z-
03z time similar to last evening.

Mtf

Lot watches warnings advisories
Il... Beach hazards statement... Ilz006-ilz014 until 4 am Saturday.

In... Beach hazards statement... Inz001-inz002 until 4 am Saturday.

Lm... Small craft advisory... Nearshore waters
until 4 am Saturday.

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
CNII2 14 mi17 min NE 12 G 15 67°F 54°F
JAKI2 14 mi107 min E 12 G 17 70°F
CMTI2 - 9087044 - Calumet, IL 16 mi47 min NNE 8 G 14 68°F 1019.4 hPa (+0.4)56°F
45177 16 mi107 min 74°F1 ft
OKSI2 16 mi107 min ESE 7 G 9.9 70°F
CHII2 - Chicago, IL 18 mi27 min NE 15 G 16 69°F 56°F
FSTI2 19 mi107 min E 24 69°F
45174 28 mi37 min NE 12 G 18 74°F5 ft1020 hPa
BHRI3 - Burns Harbor, IN 37 mi67 min E 4.1 G 7 64°F 1020.7 hPa
45186 43 mi27 min ENE 9.7 G 16 69°F 73°F3 ft
45170 46 mi17 min E 9.7 G 12 66°F 74°F3 ft56°F
MCYI3 - Michigan City, IN 49 mi27 min ENE 8 G 9.9 60°F 51°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
Last
24hr
N4
N2
N4
NE6
NE7
E10
NE8
NE8
G11
N10
N11
G16
N12
G18
N13
G17
N11
G17
N9
G15
N9
G14
N10
G13
N11
G17
N12
G17
N11
G15
NE10
G15
NE13
NE12
G15
NE11
NE10
G13
1 day
ago
SW2
SW3
SW3
SW4
G8
SW2
G5
SW3
SW3
G7
SW5
G9
SW7
SW7
G14
SW7
G11
SW8
G12
W4
NW5
G9
N8
NW1
N5
G10
N4
G8
N3
N3
N3
N3
G6
N3
N4
2 days
ago
S4
S6
S4
SW4
SW5
S5
SW2
S5
SW4
W1
SW1
G5
NE7
E2
SE7
G11
S4
G8
W1
W2
W2
W2
W2
G6
W2
SW1
SW1
SW2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL6 mi1.9 hrsENE 610.00 miFair68°F55°F63%1019.1 hPa
Chicago, Chicago-O'Hare International Airport, IL16 mi1.9 hrsN 610.00 miFair59°F53°F81%1019.9 hPa
Lewis University Airport, IL17 mi72 minNNE 410.00 miFair57°F53°F88%1020 hPa
Lansing Municipal Airport, IL22 mi72 minN 010.00 miFair62°F52°F72%1020.3 hPa
Gary Regional Airport, IN24 mi2.5 hrsE 77.00 miFair66°F50°F56%1020.3 hPa
Joliet Regional Airport, IL24 mi72 minN 310.00 miFair57°F56°F100%1020 hPa

Link to 5 minute data for KMDW

Wind History from MDW (wind in knots)
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
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrN5NW5N7N5NE6E10E12
G17
NE9NE14N13
G21
NE10NE16NE14--NE10------NE10--E7--E6E7
1 day agoCalmSW5----W6W7SW8W10W10--W13
G22
W9NW11NW8NW5N8--NE6NW6--N7N3--N5
2 days agoNW3CalmSW4W5S4SW3SW7SE6SE10Calm----S5W3CalmW4--W5------Calm--W4

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 (6,6,7,8)
      (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.