Saturday, May25, 2019 L-36.com


Marine Weather and Tides
North Chicago, 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 5:19AMSunset 8:17PM Saturday May 25, 2019 6:31 AM CDT (11:31 UTC) Moonrise 1:16AMMoonset 11:22AM Illumination 61% Phase: Waning Gibbous; Moon at 21 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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LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor-calumet Harbor To Gary- Gary To Burns Harbor-burns Harbor To Michigan City- 347 Am Cdt Sat May 25 2019
Today..Southwest winds 15 to 20 kt. Partly Sunny. Slight chance of showers and Thunderstorms. Waves 1 to 3 ft.
Tonight..Southwest winds 10 to 20 kt becoming west 5 to 10 kt after midnight. Chance of showers and Thunderstorms. Waves 1 ft or less.
Sunday..Northeast winds 5 to 10 kt. Chance of showers and slight chance of Thunderstorms. Waves 2 ft or less.
Sunday night..North winds 5 to 10 kt. Partly cloudy. Waves 2 ft or less.
LMZ740 Expires:201905251530;;426796 FZUS53 KLOT 250847 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 347 AM CDT Sat May 25 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>745-251530-


7 Day Forecast for Marine Location Near North Chicago, IL
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location: 42.35, -87.79     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 251127
afdlot
area forecast discussion
national weather service chicago romeoville, il
627 am cdt Sat may 25 2019

Short term
310 am cdt
through Sunday...

we have ended the flash flood warning across the area this
morning, given that the main focus for thunderstorms has been to
the north of the area overnight.

The main forecast challenges will be the chances for thunderstorms
again this evening and overnight, especially over my central and
southern cwa.

While most of the area will remain dry for much of the afternoon,
there is still a chance for a period of showers, and possibly a
thunderstorm this morning. This would be the result of any
remnant thunderstorm activity, now over northwestern mo, moving
northeastward over the area this morning. If it holds together as
it moves northeastward this morning, it should not produce a heavy
rain threat. After the possibility of these morning showers, it
appears that much of the afternoon will be dry across the area.

For this reason, I have cut back on pops significantly for today.

Otherwise, expect southwesterly winds should result in a mild
day, with highs around 80.

The next period of interest for more active weather looks to be
this evening into Sunday as a cold front gradually sags southward
over the area. Showers and thunderstorms are expected to develop
along this frontal boundary this afternoon to our west over ia as
the front interacts with a warm and moist prefrontal airmass.

These thunderstorms may then shift eastward into portions of
northern il during the mid to late evening hours. While confidence
is not the highest on the extent of thunderstorms moving into
northern il this evening, there is at least a conditional threat
for strong to severe thunderstorms over the area this evening.

This is especially true given the favorable prefrontal
thermodyamics and kinematics, which should looks to be supportive
of strong storms. Deep uni-directional shear, with mid-level flow
approaching 60 kt suggests the possibly for some high wind
producing storms. However, hail could also be a concern with
fairly steep mid-level lapse rates. This possibility will need to
be refined with forecast updates later today.

Following this possible evening activity it then appears that the
threat for showers and storms will continue into Sunday,
especially south of i-80. This in response to a mid-level
impulse, emanating from the southwestern CONUS trough, which
should shift across the area Sunday morning. Given the high
moisture content over my southern cwa, and the likelihood of more
widespread showers and storms, the threat for heavy rain and
possible flooding could be of concern, again mainly south of i-80
into my central il counties.

While the main focus for precipitation into Sunday will be over
my southern cwa, areas over far northern il will likely remain dry
for much of Sunday. However, cooler conditions are expected as
northerly flow results in temperatures in the low 70s inland, and
in the 60s near the lake.

Kjb

Long term
223 am cdt
Monday through Friday...

active pattern looks to continue for at least the first half of
the upcoming work week. Though unlike the past couple days, it
would appear that our shower & t-storm chances will become more
tied to larger scale synoptic features, which should eventually
lend itself to better predictability.

First shortwave trough passing north of the area in the Monday
time frame should result in an uptick in shower t-storm chances
Monday into Monday night. The next, even stronger wave, should
result in increasing chances of thunderstorms later Tuesday into
Tuesday night. Timing diurnally may by a negative for severe
weather threat locally Tuesday night, but otherwise, we should
remain a pattern with unseasonably strong flow aloft and resultant
shear, so anytime we sufficiently destabilize, the threat of
strong to severe thunderstorms is there. In addition, very moist
air will continue to feed into the region providing plenty of
juice for potential heavy rainfall as well.

Latest runs of the gfs, ecmwf, and gem all have us in the windy
and warm dry slot of the cyclone Wednesday. Temperatures will
retreat some later in the week as a weak long wave trough settles
into the upper great lakes and ultimately looks to provide us a
respite from the active weather pattern of late.

- izzi

Aviation
For the 12z tafs...

a weak upper level disturbance could bring some -shra to the
terminals later this morning into the very early afternoon, but
confidence is low in that area of shra maintaining itself, so just
kept vcsh. Feel relatively confident that there won't be any tsra
affecting the terminals or c90 airspace through at least mid-
afternoon and probably not until this evening. Still appears to be
a threat of at least sctd tsra this evening into the first part of
the overnight hours ahead of an approaching cold front. Said front
will move through prior to dawn Sunday bringing a wind shift to
north or northeast and perhaps a few clouds off the lake.

- izzi

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
45186 1 mi32 min SSW 9.7 G 16 64°F 51°F1 ft
WHRI2 - Waukegan Harbor, IL 1 mi52 min WSW 14 G 16 72°F
45187 10 mi32 min WSW 7.8 G 12 62°F 48°F1 ft
45174 16 mi22 min SW 5.8 G 7.8 62°F 1 ft1011.1 hPa62°F
KNSW3 - Kenosha, WI 17 mi32 min E 4.1 G 5.1 53°F 1010.5 hPa (+2.0)
FSTI2 27 mi92 min SSW 12 73°F
CHII2 - Chicago, IL 32 mi32 min WSW 15 G 19
CNII2 35 mi17 min W 2.9 G 12 73°F 64°F
JAKI2 41 mi92 min WSW 5.1 G 8 73°F
CMTI2 - 9087044 - Calumet, IL 45 mi32 min WSW 4.1 G 9.9 72°F 1011.8 hPa (+1.9)67°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 46 mi22 min SSW 12 G 14 47°F 40°F1011.3 hPa47°F
MLWW3 - Milwaukee, WI 48 mi22 min Calm G 1 53°F

Wind History for Calumet Harbor, IL
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Last
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N10
G15
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SE6
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G16
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G12

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL6 mi37 minSW 1010.00 miFair70°F61°F73%1009.9 hPa
Kenosha, Kenosha Regional Airport, WI18 mi39 minWSW 910.00 miFair69°F64°F87%1010.2 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi40 minSW 610.00 miFair73°F61°F66%1011.5 hPa

Wind History from UGN (wind in knots)
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Last 24hrSW3E7E6SE8
G19
SE6E3E105E8SE8SE10SE3E6CalmE4E3E4CalmS3S11
G19
SW8SW16
G26
SW6SW10
1 day ago6W5W7
G18
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W6W5CalmN4NE6CalmN3CalmNE3CalmN3SW4
2 days agoSE5SE7SE7SE9SE11S10SE11SE10
G20
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G33
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G38
SW23
G31
S17
G27
S18
G30
S13S9S9SW14
G21
S11S12SW12
G28
56W54

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 (7,2,3,4)
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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.