Wednesday, June20, 2018 L-36.com


Marine Weather and Tides
Gurnee, IL

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:13AMSunset 8:33PM Wednesday June 20, 2018 2:14 PM CDT (19:14 UTC) Moonrise 1:05PMMoonset 1:09AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 930 Am Cdt Wed Jun 20 2018
Rest of today..North winds 10 to 15 kt becoming northeast. Patchy fog this morning. Mostly cloudy. Waves 2 to 4 ft.
Tonight..Northeast winds 10 to 15 kt. Slight chance of showers after midnight. Waves 1 to 3 ft.
Thursday..Northeast winds 10 to 15 kt. Slight chance of showers. Waves 1 to 3 ft.
Thursday night..East winds 10 to 20 kt. Chance of showers and slight chance of Thunderstorms. Waves 2 to 4 ft building to 3 to 5 ft after midnight.
LMZ740 Expires:201806202130;;832476 FZUS53 KLOT 201430 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 930 AM CDT Wed Jun 20 2018 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>742-202130-

7 Day Forecast for Marine Location Near Gurnee, IL
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location: 42.38, -87.94     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 201835
afdlot
area forecast discussion
national weather service chicago romeoville, il
135 pm cdt Wed jun 20 2018

Short term
341 am cdt
through tonight...

it is relatively quiet early this morning across northeast il and
northwest in, but there are still a few showers (could be an isolated
ts, due to very low but non zero instability aloft) early this
morning as a slow moving shortwave traverses the area. This
activity is weakly forced but the atmosphere is still quite moist
such that these may stick around until at least daybreak before
they exit to the lake and points eastward. The main focus is
currently north of i-88 i-90, but isolated cells could fill in
farther south.

After this wave departs, there is additional shortwave energy tied
closer to the surface frontal zone that will shift into central
illinois this morning as upper ridging moves toward southern lake
michigan. Therefore, expect some decrease in already somewhat
limited coverage overnight. The main focus for redevelopment will
remain in our far southwest areas, closer to western and central
illinois with anything farther northeast expected to struggle.

There is also fairly coherent though somewhat ragged blanket of
lower clouds given the very moist low levels as well. These may be
a little pesky and slow to clear, eventually we do start to see
some erosion from the ne. Cooler and stabilizing NE flow will keep
temps down below normals, except possibly far south.

Waves will pinwheel out ahead of the upper trough across the
plains, attempting to interact with the frontal zone, each
attempt to bring showers and some thunderstorms northeastward.

Expect a slow but eventual progression overnight into Thursday.

Kmd

Long term
341 am cdt
Thursday through Tuesday...

closed upper level low pressure in time for the summer solstice
will bring a couple of days of cooler, cloudy, and wet days for
most of NE illinois and NW wisconsin. The better precipitation
coverage initially for precip will be well south of the i-80
corridor to begin the period. The low will ultimately pass just
south of the chicago area, but wrap around moisture in a high pwat
environment will again be a significant factor in encouraging
modest precip rates at times. At this time a significant flash
flood threat is not a concern, but we will need to watch Friday
morning as the system slows down pivots over the already
waterlogged northern counties.

The precip shield should wind down over our area Friday night as
the upper low will cross into indiana. Another cooler day will
follow its departure. High pressure over the northern and eastern
great lakes will maintain a cooler northeast wind. There are some
hints that conditions will remain generally dry trough the
remainder of the weekend, though confidence is still lower as the
upper pattern is messy and a front will be parked just to our
south. After ridging to start the week, another low will form in
california and will migrate through our area again mid week. This
will bring another unsettled pattern.

Kmd

Aviation
For the 18z tafs...

expect an active period with showers and some thunderstorms
appearing likely across all the sites. In the near term, dry
conditions in place with isolated showery development continue to
develop away from the terminals. Expect this general pattern to
remain, however, think precip chances will increase later tonight
into Thursday as an upper level system approaches the area.

Periodic showers then likely through the end of the period with
some thunder potential tonight, but with the highest chances
arriving Thursday morning. MVFR ceilings will likely improve to
vfr this afternoon, but with MVFR ceilings returning later tonight
into Thursday morning.

Rodriguez

Marine
333 am... A frontal boundary will remain stationary across the
ohio valley and southern great lakes region through the end of the
week as high pressure remains from the northern plains to new
england. This will maintain a northeasterly flow across lake
michigan. Low pressure over the central plains will move east into
central il by Friday morning and then is expected to move
northeast toward lake erie Saturday. As this low passes south of
lake michigan Thursday night into Friday... The gradient will
tighten with a period of easterly 15-25kts possible over southern
lake michigan. A cold front is expected to move south across the
region Sunday night as high pressure builds across the northern
lakes region early next week. Cms

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
WHRI2 - Waukegan Harbor, IL 7 mi35 min NNE 13 G 14 59°F
KNSW3 - Kenosha, WI 16 mi75 min NNE 9.9 G 11 60°F 1012.9 hPa (+0.0)
FSTI2 32 mi135 min N 5.1 62°F
OKSI2 36 mi135 min N 5.1 G 7 63°F
CHII2 - Chicago, IL 38 mi25 min N 8 G 8.9 61°F 61°F
45177 38 mi135 min 65°F1 ft
CNII2 40 mi15 min N 6 G 11 68°F 63°F
JAKI2 46 mi135 min NNE 8.9 G 12 66°F
MLWW3 - Milwaukee, WI 46 mi25 min NE 7 G 8 58°F

Wind History for Calumet Harbor, IL
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NE5
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G14
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SW8
G16
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G20
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G14
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G15
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G14
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G12
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G12
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G12
SW6
G10
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G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL5 mi20 minENE 710.00 miOvercast67°F62°F84%1011.7 hPa
Kenosha, Kenosha Regional Airport, WI15 mi22 minENE 710.00 miOvercast69°F62°F78%1012.5 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi23 minNE 910.00 miFair75°F64°F71%1012.1 hPa

Wind History from UGN (wind in knots)
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Last 24hrNE8NE8NE6N7N6NE5NE9N11
G15
N8N6N4N5N5N7N6N5N4NE5NE4N5NE8E6NE6NE7
1 day agoSW18
G21
SW12
G21
N17
G26
3CalmN74N6N8N5N4NE5NE6N4N7NE4NE5N4E6N6NE4N6NE7NE8
2 days agoSW13SW6
G16
SW9SW12SW13SW13SW7S8SW8SW9SW10SW10SW10SW10SW9SW10SW10SW6W7SW9W7SW10
G17
SW15
G20
SW16
G21

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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wmap_A
GOES Local Image of Midwest    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (15,3,4,5)
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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.