Monday, March18, 2019 L-36.com


Marine Weather and Tides
Elmhurst, IL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:56AMSunset 7:02PM Monday March 18, 2019 9:13 PM CDT (02:13 UTC) Moonrise 4:14PMMoonset 5:46AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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:201903190415;;567804 Fzus53 Klot 181940 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 240 Pm Cdt Mon Mar 18 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>742-190415- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 240 Pm Cdt Mon Mar 18 2019
Tonight..East winds less than 10 kt becoming variable in the early evening, then southwest in the late evening and overnight. Partly cloudy. Waves 1 ft or less.
Tuesday..Southwest winds 5 to 10 kt becoming south in the afternoon. Mostly Sunny. Waves 1 ft or less.
Tuesday night..South winds 10 to 15 kt. Partly cloudy. Waves 1 ft or less.
Wednesday..Southwest winds 10 to 15 kt. Slight chance of rain in the morning. Waves 1 ft or less.
LMZ741


7 Day Forecast for Marine Location Near Elmhurst, IL
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location: 41.89, -87.94     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 182335
afdlot
area forecast discussion
national weather service chicago romeoville, il
635 pm cdt Mon mar 18 2019

Short term
1210 pm cdt
through Tuesday...

a weak disturbance in northwest flow will lead to an expansion of
cumulus stratocumulus this afternoon. Low level lapse rates are
steep and this will promote isolated to widely scattered shower
development. Visible satellite suggests that most of the clouds
are shallow initially, there is some limited vertical growth
suggesting some development is expected, and we are already seeing
some echoes on klot radar this afternoon. Given low wet bulb
temperatures, showers could mix with snow or even graupel (small
ice pellets). These showers will taper off fairly quickly after
sunset.

High pressure will pass through central illinois and shift to the
eastern great lakes on Tuesday. Winds will shift to southwesterly
and allow for some additional warming, and many areas will make a
run at 50 degrees or so. Meanwhile, high clouds will spread
overhead as an upper low will sink into the northern and central
plains.

Kmd

Long term
Tuesday night through Monday...

233 pm... Primary forecast concern is a period of rain late
Tuesday night through Wednesday morning. Additional concerns are
high temps through the weekend and possible lake breezes.

Low pressure will move across ontario Tuesday night with a trough
moving across the western lakes region as another low moves from
the central plains to central il Wednesday morning. This second
low will bring a period of rain to the region early Wednesday
morning and the trend is for this to extend a bit further north
than previous forecasts... Perhaps as far north as the i-88 i-90
corridor. Have bumped pops up quite a bit across the area with
categorical pops across the southern cwa. Storm total QPF could
reach a quarter third of an inch... But most of this should fall
south of the fox rock basins. Precip type appears to be mainly
rain. There could be some mixed wet snow flakes as the precip
develops. May also see some brief sleet as the low levels
saturate. Confidence is somewhat low for high temps on Wednesday
and will likely be dependent on the extent of any sunshine by
afternoon. Still have high temps near 50 which may be a tad too
warm to the east and perhaps a few degrees too cool in the west.

As a cold front moves across the area in the afternoon... There is
at least a chance for a few showers but have maintained a dry
forecast for now.

A large ridge of high pressure will move across the region Friday
and gradually shift southeast on Saturday and Sunday. With this
high nearby... Lake breezes will become a concern and with the air
over the lake as cold as it is in mid march... There could be some
significant temperature gradients if the winds turn onshore. From
this distance... It appears an afternoon lake breeze would move
inland Friday... With prevailing southeasterly winds Saturday and
then a south southeast wind Sunday affecting mainly the immediate
il shore. But confidence is too low to include this in the
forecast from this distance. Opted to leave the forecast as is
with high temperatures generally in the 50s with some modest
cooling along the lakeshore. With full sunshine... Highs inland may
be warmer than currently indicated. Next chance of rain appears
to be next Sunday afternoon night. Cms

Aviation
For the 00z tafs...

high pressure over the region will continue to provide fair
weather conditions and diminishing winds the rest of today into
tonight. Winds will back to the south or southwest overnight with
passage of the ridge axis, then steadily increase back to around
10 kt out of the southwest Tuesday morning. Winds should stay
strong enough on Tuesday to keep any lake breezes from advancing
far inland, but will still need to be monitored closely.

AnticipateVFR conditions through the period with only some
passing mid and high clouds. Some showers are possible just beyond
the current TAF periods. Showers are expected to be around or
over the terminals after midnight Tuesday night into Wednesday
morning.

Bmd

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
FSTI2 17 mi134 min WSW 7 41°F
CHII2 - Chicago, IL 20 mi44 min W 9.9 G 11 42°F 23°F
JAKI2 21 mi134 min W 5.1 G 12 42°F
CMTI2 - 9087044 - Calumet, IL 24 mi56 min WSW 1.9 G 4.1 40°F 1027.5 hPa24°F
WHRI2 - Waukegan Harbor, IL 33 mi94 min WSW 6 G 8 40°F
BHRI3 - Burns Harbor, IN 45 mi94 min WSW 1.9 G 1.9 39°F 1028.4 hPa
KNSW3 - Kenosha, WI 49 mi74 min SW 2.9 G 4.1 41°F 1027.1 hPa (+0.3)

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago-O'Hare International Airport, IL7 mi23 minSW 410.00 miA Few Clouds37°F24°F59%1028.3 hPa
Chicago, Chicago Midway Airport, IL12 mi21 minWSW 410.00 miA Few Clouds38°F23°F55%1029.1 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL15 mi22 minS 310.00 miFair37°F23°F57%1028.9 hPa
Chicago / West Chicago, Dupage Airport, IL17 mi22 minSW 410.00 miFair34°F24°F67%1028.5 hPa
Lewis University Airport, IL21 mi39 minWSW 310.00 miFair36°F27°F69%1028.4 hPa

Wind History from ORD (wind in knots)
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Last 24hrNW5W4NW6W6NW6NW6W4NW4NW6W4W4NW6W5NW7W8W10W12W11W10W10W8W8W4SW4
1 day agoCalmSE4SE4SE4S4CalmCalmCalmCalmW5SW6SW5SW7W11
G14
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2 days agoW16
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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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Wind Forecast for Chicago, IL (22,6,7,8)
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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.