Saturday, August24, 2019 L-36.com


Marine Weather and Tides
North Riverside, 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 6:07AMSunset 7:39PM Saturday August 24, 2019 4:14 PM CDT (21:14 UTC) Moonrise 12:00AMMoonset 2:55PM Illumination 32% Phase: Waning Crescent; Moon at 24 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 Expires:201908250315;;148727 Fzus53 Klot 241951 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 251 Pm Cdt Sat Aug 24 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>742-250315- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 251 Pm Cdt Sat Aug 24 2019
.small craft advisory in effect until 3 pm cdt this afternoon...
Late this afternoon..East winds 10 to 15 kt. Mostly Sunny. Waves 2 to 4 ft.
Tonight..East winds 10 to 20 kt becoming southeast 15 to 20 kt after midnight. Mostly clear. Waves 2 to 4 ft.
Sunday..Southeast winds 15 to 20 kt. Mostly Sunny. Waves 2 to 4 ft.
Sunday night..Southeast winds 15 to 25 kt. Chance of showers and slight chance of Thunderstorms late. Waves 3 to 5 ft.
Monday..South winds 10 to 20 kt. Chance of showers and slight chance of Thunderstorms. Waves 2 to 4 ft.
LMZ741


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 241915
afdlot
area forecast discussion
national weather service chicago romeoville, il
215 pm cdt Sat aug 24 2019

Short term
213 pm cdt
through Sunday night...

fairly quiet weather will continue across the area through at least
Sunday morning as sprawling high pressure over the upper great lakes
slowly moves east. Expect continued winds from the NE to SE quadrant
under some passing upper-level clouds through tonight.

Winds have diminished over water this afternoon and waves have
responded accordingly. Therefore, the current ending time of 3pm
ct for the beach hazards statement looks on track. However, another
increase in onshore winds late tonight into Sunday morning may
result in an increased swim risk with 2-4 foot waves during this
time.

A fairly pronounced trough currently over the central great plains
will track ne, reaching the CWA by late Sunday night. Upper-level
clouds will gradually thicken and lower through the day Sunday ahead
of this trough. Though some guidance is attempting to bring a few
showers into the south half of the CWA by late Saturday afternoon, a
substantially dry layer should lead to only virga. The dry layer
will continue to limit the northward extent of showers Sunday
evening. As the trough arrives late Sunday night, notable moisture
advection in the low to mid-levels will finally allow for isolated
to scattered shower coverage, especially farther east in the cwa.

Poor mid-level lapse rates will limit thunderstorm potential, but
enough instability exists within this WAA regime to support at least
a slight chance mention of thunder.

Kluber

Long term
215 pm cdt
Monday through Saturday...

the period is expected to begin Monday on the unsettled side as an
upper level trough digs over the north central conus. However, by
Tuesday another few day period of mainly dry and cool weather is
expected.

Showers, and possibly a few thunderstorms, may be ongoing across
eastern il and northern in Monday morning in response to an
lead mid-level disturbance shifting northeastward over the area.

While skies will remain cloudy through the day Monday, it does
appear that we could have a period of rain-free time from the
late morning and into the afternoon following the passage of this
initial disturbance. However, the chances for showers and
thunderstorms will increase across the area again by Monday
evening.

A well defined mid upper level trough will set up over the upper
midwest later Monday and Monday night. As it does so, an
associated sub 996 mb surface low is expected to develop late Monday
and Monday night over far western ontario. It will be this storm
systems cold front that we will be focusing on for our next chance
for shower and thunderstorm activity over the area Monday night
through early Tuesday. Currently it appears that this cold front
will shift over north central il by late Monday evening, then over
northeastern il during the overnight hours and then exiting my
southeast Tuesday morning. For this reason, our best chances for
decent rainfall amounts will be Monday night. Severe weather is
not expected with this activity.

Any lingering showers should end quickly Tuesday morning
following the passage of this cold front. Dry and pleasant
conditions should return to the area for midweek as a surface high
settles over the lower missouri valley. High temperatures are
likely to remain in the 70s through late week.

Overall, mainly dry conditions are expected mid to late week.

However, forecast guidance suggests that another cold front could
move over the area sometime later in the week, and this could
result in another small chance for showers and storms. However,
given that this is several days away, I have not strayed from the
blended guidance during this period.

Kjb

Aviation
For the 18z tafs...

vfr conditions expected through the period with persistent winds
from the NE to SE quadrant. Some virga will be possible late
Sunday afternoon as approaching -shra from the SW dissipate in a
substantially deep dry layer.

Kluber

Lot watches warnings advisories
Il... Beach hazards statement... Ilz006-ilz014 until 3 pm Saturday.

In... None.

Lm... Small craft advisory... Il nearshore waters until 3 pm Saturday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CNII2 11 mi45 min NE 8.9 G 12 71°F 51°F
45177 12 mi135 min 75°F1 ft
OKSI2 12 mi135 min E 8 G 11 70°F
FSTI2 13 mi135 min ENE 15 69°F
CHII2 - Chicago, IL 14 mi55 min NE 11 G 13 69°F 54°F
JAKI2 14 mi135 min ENE 4.1 G 8.9 70°F
CMTI2 - 9087044 - Calumet, IL 17 mi57 min NNE 9.9 G 12 70°F 1022.8 hPa52°F
45174 22 mi45 min NE 9.7 G 16 73°F3 ft1023.7 hPa
45186 37 mi55 min ENE 9.7 G 12 70°F 73°F
BHRI3 - Burns Harbor, IN 38 mi71 min NNE 7 G 8.9 69°F 1023.7 hPa
45187 45 mi55 min E 7.8 G 12 73°F 73°F3 ft
45170 46 mi45 min NNE 9.7 G 14 69°F 69°F2 ft54°F
MCYI3 - Michigan City, IN 49 mi55 min NNE 13 G 14 68°F 53°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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N8
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N13
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SW8
G12
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G6
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G11
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G16
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G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL5 mi22 minENE 12 G 1910.00 miPartly Cloudy73°F48°F43%1022.3 hPa
Chicago, Chicago-O'Hare International Airport, IL11 mi24 minENE 11 G 1710.00 miPartly Cloudy72°F48°F44%1023 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi23 minENE 910.00 miFair73°F50°F44%1023.8 hPa
Lewis University Airport, IL22 mi20 minNE 1010.00 miFair73°F49°F43%1023 hPa
Chicago / West Chicago, Dupage Airport, IL24 mi23 minENE 1110.00 miFair74°F48°F41%1022.7 hPa

Link to 5 minute data for KMDW

Wind History from MDW (wind in knots)
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Last 24hrN13NE12N13NE12NE6NE7NE7NE7E6E4SE7E4SE5SE8SE6SE9SE9E11E11
G21
E8E11E13
G17
E13E12
G19
1 day agoNE16NE14NE10NE10NE10NE13NE11NE10NE7E7E6E6E7NE9NE9E12
G17
E8E11
G17
E10
G18
NE9
G19
E15NE11
G19
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2 days agoW9NW11NW8NW5N8N6NE6NW6N6N7N3NW4N5N5NW5N7N5NE6E10E12
G17
NE9NE14N13
G21
NE10

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (17,4,5,8)
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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.