Monday, May29, 2017 L-36.com


Marine Weather and Tides
Lincolnwood, IL

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:17AMSunset 8:19PM Monday May 29, 2017 2:49 AM CDT (07:49 UTC) Moonrise 9:28AMMoonset 12:00AM Illumination 15% Phase: Waxing Crescent; Moon at 4 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
LMZ741 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor-calumet Harbor To Gary- 939 Pm Cdt Sun May 28 2017
.small craft advisory in effect from Monday morning through Monday evening...
Rest of tonight..West winds 10 to 15 kt becoming southwest. Mostly clear. Waves around 1 ft.
Monday..Southwest winds 10 to 20 kt becoming west 20 to 25 kt by late morning. Slight chance of showers. Slight chance of Thunderstorms in the afternoon. Waves around 1 ft building to 1 to 3 ft in the afternoon.
Monday night..West winds 10 to 20 kt diminishing to 10 to 15 kt by late evening. Partly cloudy. Waves 1 to 3 ft.
Tuesday..Southwest winds 10 to 20 kt becoming west 15 to 20 kt. Slight chance of showers and Thunderstorms in the afternoon. Waves 1 to 3 ft.
LMZ741 Expires:201705291015;;375071 FZUS53 KLOT 290239 NSHLOT NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 939 PM CDT SUN MAY 28 2017 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>743-291015-

7 Day Forecast for Marine Location Near Lincolnwood, IL
   Hourly   EDIT   Help
location: 41.95, -87.63     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klot 290518
afdlot
area forecast discussion
national weather service chicago romeoville, il
1218 am cdt Mon may 29 2017

Short term
151 pm cdt
through Monday...

a cold front has pushed across northern illinois and northwest
indiana earlier today with convection early this afternoon in the
vicinity of the front, primarily over northern indiana, but
clipping benton county. Behind the front, northwest winds have
overspread most of the CWA with modest instability in place, but
weakly capped or uncapped per rap soundings. There will be two
areas to keep an eye on through the afternoon and evening for
potential showers and thunderstorms. The first will be associated
with the lake breeze in and around the chicago metro area this
afternoon. A strong thunderstorm has already developed on the
boundary and additional isolated showers and storms will be
possible through the afternoon. Farther west, a secondary surface
trough is evident in obs while a CU field has developed within the
vicinity of the trough that stretches from central wi into far nw
il an eastern ia. There is potential for isolated to widely
scattered convection as this area moves across the CWA mid to late
this afternoon and into the early evening. With only 500-700 j kg
mlcape and 20-30kt deep layer shear in place, severe threat is
not a big concern, but cannot rule out the potential for a few
storms to become strong. Cloud to ground lightning and gusty winds
would be a concern for any outdoor events.

Threat for precipitation should wane diurnally with dry conditions
expected overnight into Monday morning. Upper low is expected to
pivot across the western great lakes tomorrow while a sheared vort
lobe drops into northern illinois. Forecast soundings tomorrow
are not too terribly different than today indicating steep low
level lapse rates with modest instability and little or no
convective inhibition. Given the favorable diurnal timing of the
shortwave, anticipate widely scattered showers and thunderstorms
will once again be a possibility. Temperatures will also be
fairly similar tomorrow with highs in the mid 70s. Deep mixing and
breezier conditions will be in place though, so there is a lower
likelihood of a lake breeze.

Deubelbeiss

Long term
213 pm cdt
Monday night through Sunday...

the upper level trough spreads over the region Monday night. Cooler
air will lead to lows in the low 50s. Soundings are pretty dry so
kept a dry forecast going after any lingering showers exit to the
east Monday evening. Another vorticity streamer rotates around the
upper level low and it may kick off showers and storms Tuesday
afternoon. Tuesday will also be cooler with highs around 70.

High pressure builds over the plains Tuesday night and Wednesday,
and the upper level low slowly shifts east. Wednesday will be
dry and cooler day with highs around 70.

My confidence is lower when it comes to Thursday's forecast. The
gfs features a shortwave trough and convection spreading across the
region Thursday afternoon. The 12z emcwf, on the other hand, has a
much subtler wave, but does have a little QPF Thursday afternoon.

Decided to keep a chance of showers and storms in for Thursday, but
think the GFS is suffering from convective feedback. Warmer air
moves in aloft, but not sure how much cloud cover we will have, so
kept temps in the 70s.

Late this week looks active with many periods of showers and storms.

A low is forecast to form and move through the midwest Saturday
night with another push of cooler air moving in behind it Sunday.

Jee

Aviation
For the 06z tafs...

gusty west winds and slight chance potential from isolated to
scattered late afternoon shra are the main aviation focus for
this TAF period.

Secondary cold frontal boundary noted across eastern iowa, which
will move east across the mississippi this morning and result in a
wind shift from light southwest to west winds across the
terminals after sunrise. Other than some patchy sct-bkn mid level
vfr clouds, no sig weather expected. Diurnal deepening of the
boundary layer will increase winds behind the front during the
day, with gusts in the 25-30 kt range expected this afternoon.

Cooler air aloft, combined with afternoon heating and a series of
minor mid-level disturbances, will likely result in a sct-bkn
stratocu field developing by mid-late afternoon, with isolated to
scattered showers developing especially north and west of the
terminals. While a few of these showers could impact the taf
sites, the current expectation is that coverage will be low enough
to not include in point forecasts at this time. Gusty west winds
will diminish toward sunset.

Ratzer

Marine
213 pm cdt
winds become west overnight and increase to 15-25 kt Monday. Issued
a small craft advisory for gusty winds Monday for points north of
gary, indiana. Winds will be 15-25 kt east of gary, in, but do not
have enough confidence in persistent 20-25 kt winds.

West to southwest winds of 15-25 kt are expected through Wednesday
night as a low over ontario slowly drifts north to james bay. High
pressure builds over the plains Tuesday night and then shifts south
of the lake Wednesday night. Winds become north behind a cold front
Friday.

Jee

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... Lmz740-lmz741-lmz742-lmz743... 10 am
Monday to 7 pm Monday.

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
FSTI2 2 mi110 min SSW 8.9 66°F
OKSI2 3 mi110 min WNW 1.9 69°F
CHII2 - Chicago, IL 4 mi50 min SSW 9.9 G 11 69°F 49°F
CNII2 7 mi35 min SSW 4.1 G 6 65°F
JAKI2 12 mi110 min WSW 5.1 65°F
45174 13 mi30 min SSW 5.8 G 5.8 58°F 56°F52°F
CMTI2 - 9087044 - Calumet, IL 16 mi50 min SSW 2.9 G 4.1 64°F 1007.9 hPa (+0.0)53°F
WHRI2 - Waukegan Harbor, IL 30 mi70 min WSW 8.9 G 9.9 62°F
BHRI3 - Burns Harbor, IN 33 mi70 min SSW 7 G 8.9 63°F 1009.1 hPa
45170 38 mi30 min SSW 5.8 G 5.8 59°F 58°F1 ft55°F
MCYI3 - Michigan City, IN 41 mi50 min S 6 G 7 63°F 51°F
KNSW3 - Kenosha, WI 45 mi50 min WSW 5.1 G 8.9 62°F 1007.5 hPa (+0.4)

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
3
AM
4
AM
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
Last
24hr
N1
NW2
N1
--
S1
S3
S2
N4
N4
N10
G15
N6
G11
NE5
N4
E4
NE3
NE3
G6
SE4
SW3
G6
W2
G6
SW2
SW2
SW3
SW4
SW3
1 day
ago
N5
N7
N8
G11
N5
NW4
G7
N4
G8
N5
N3
G6
NE5
N4
N5
G8
N5
NE5
NE6
NE5
NE6
G9
NE5
NE5
NE6
N1
N1
--
N1
2 days
ago
SW1
SW2
NE3
E3
NE5
NE5
G8
NE7
NE9
NE7
G10
NE5
NE7
NE7
G11
NE8
G11
NE8
G14
NW3
G7
NE12
G18
N7
NW4
G8
NE4
G8
N4
N4
N7
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL13 mi57 minSSW 510.00 miMostly Cloudy64°F51°F63%1007.5 hPa
Chicago, Chicago-O'Hare International Airport, IL14 mi59 minSW 410.00 miOvercast64°F50°F60%1007.5 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi58 minN 010.00 miOvercast61°F51°F70%1008 hPa

Wind History from MDW (wind in knots)
3
AM
4
AM
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
Last 24hrCalmCalmNE3E3SE3S5W4W6W9NW11NW5NE9E7E5W15W10W8W11W5W5SW5SW6SW5S5
1 day agoNE4N7N6N5N5NE6NE5E9E7E6E34E4E9E7E8E8E6E8E5E3CalmE3Calm
2 days agoCalmCalmCalmS3SE3S4SE66E10E12E11E9E10E10E12N9NE9NE12NE8NE8NE7NE7NE5N7

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Chicago, IL (3,6,7,8)
      (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.