Wednesday, January23, 2019 L-36.com


Marine Weather and Tides
Evanston, 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 7:09AMSunset 4:55PM Wednesday January 23, 2019 5:46 AM CST (11:46 UTC) Moonrise 9:11PMMoonset 10:05AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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 Expires:201901231615;;793049 Fzus53 Klot 230939 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 339 Am Cst Wed Jan 23 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>742-231615- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 339 Am Cst Wed Jan 23 2019
.small craft advisory in effect through this evening...
Today..Northeast winds 10 to 20 kt becoming north 20 to 25 kt by late morning, then becoming northwest early this afternoon. Rain changing to snow this morning, then ending early this afternoon. Freezing spray in the afternoon. Waves 1 to 3 ft building to 3 to 5 ft by noon.
Tonight..West winds 10 to 20 kt. Freezing spray. Waves 2 to 4 ft.
Thursday..West winds 10 to 20 kt increasing to 30 kt in the afternoon. Freezing spray. Waves 1 to 3 ft building to 3 to 5 ft in the afternoon.
Thursday night..Northwest winds to 30 kt. Heavy freezing spray. Waves 3 to 5 ft.
LMZ741


7 Day Forecast for Marine Location Near Evanston, IL
   Hourly   EDIT   Help
location: 42.03, -87.69     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klot 231103
afdlot
area forecast discussion
national weather service chicago romeoville, il
503 am cst Wed jan 23 2019

Update
452 am cst
expanded the winter weather advisory to include lasalle, kendall,
dupage, and cook counties through noon today. The rain snow line
which was previously discussed right along the peru to chicago
line as shifted slightly to the southeast, providing a quicker
transition to all snow for much of the counties just added to the
advisory. As was also previously thought, temps have fallen a
couple of degrees with freezing rain also being reported this past
hour. The combination of the possible light icing with a snow
accumulation of 1 to 3 inches under moderate to heavy snow this
morning, have higher confidence for hazardous conditions in these
locations today. Still tricky forecast as the rain snow line is
pretty much bisecting these counties. Although hazardous
conditions are possible over the entire counties, have higher
confidence for the northern portions. For lasalle county, i-80
will be a likely transition line, with conditions south of this
line possibly staying slightly better. For cook, i-55 will be a
likely transition line with conditions south of this line
possibly staying slightly better.

Rodriguez

Short term
343 am cst
through tonight...

main forecast concerns challenges are with continued precip
development through late morning over the entire cwa, with either
rain or snow the main precip types.

Mid upper level trough continuing to swing through the region
while surface low trough lifts northeast through il, and expect
both of these features to lift northeast of the area by
midday early afternoon. At this time, radar imagery showing a
quick lull in some of the precip development across northeast il.

Expect this lull to be very brief with precip filling back in, as
low level fgen increases right over the cwa. Already seeing this
occurring across eastern ia and far northwest il, and expect this
development to expand further northeast over the next 1-2 hours. A
period of strong fgen and WAA through mid to late morning will
support light to moderate precip intensity over much of the cwa.

Will continue to monitor trends, but wouldn't be surprised to see
some brief heavier precip intensity across portions of north
central il.

Widely varying thermal profiles are still in place this morning
and are centered right over the cwa. Thermal profiles supporting
all snow are along and north of a line from amboy to lake forest
il, and expect this to generally be the trend for these locations.

Winds already turning to the north in these locations, and expect
further cooling through the morning. Once again, snow will fill
back in across this entire area over the next hour with light to
moderate snow expected. This persistent snow along with the
potential for brief heavier bursts will support additional snow
amounts of 2-4 inches with some isolated 5 amounts. Hazardous
travel with snow covered roads and reduced visibility will impact
the morning commute, and have not made any adjustments to the
current headlines or end times of noon today. With the departure
of this snow, expect the afternoon and tonight to be dry.

Around a line from peru to chicago il will be a tricky area with
regard to precip type, as the current rain falling in this
location will begin to transition over to a rain snow mix and then
possibly all snow before the precip ends by mid late morning.

Some variability with either snow or rain appearing likely over
the next couple of hours, but think a trend towards more snow
would be favored after that. Surface temps in this location are
just right above freezing, however, will likely fall a couple of
degrees over the next several hours. This will provide some
possible slippery conditions with possible light freezing drizzle
and snow with the transition. Additionally, some strengthening
winds along with this cooling could allow some freezing of wet
surfaces. Do think the likelihood any additional icing similar to
what was observed yesterday is real low though, and am only
expected additional snow amounts of a half inch to an inch in this
location. With this in mind, did not issue any headlines but did
issue an sps to highlight the possible for slippery conditions for
a part of the morning.

South of the peru to chicago line, all rain is expected before
the precip departs by midday. Temps are above freezing and expect
them to remain above freezing while the precip is occurring. High
temps today are occurring right now CWA wide, with temps expected
to fall later this morning through the afternoon.

Rodriguez

Long term
358 am cst
Thursday through Tuesday...

the start of the period is looking mainly dry, but anticipate
deep upper trough and associated surface trough front to swing
through during the day Thursday. This should allow for additional
falling temps in the afternoon along with some slight increased
chance for light snow showers or flurries. Guidance not really
picking up on this potential, but could at least see flurry
development on Thursday. Rather cold air mass and cold temps still
expected by the end of the work week. Coldest nights appearing
likely Thursday night and Friday night, with the cold air mass in
place along with likely surface ridging. Wind chills will be a
concern as well and at this time, are still appearing to be
headline worthy. Some additional cold days and nights also
appearing probable this weekend and especially early next week,
along with periodic snow chances. Guidance indicating an active
pattern to persist, with multiple systems to possibly track across
the region.

Rodriguez

Aviation
For the 06z tafs...

rain snow line is expected to meander around the chicago terminals
overnight, drifting north for a time overnight, then quickly
crashing back southeast Wednesday morning as colder air filters
in. Precise timing of the various switch overs between rain,
rain snow, and snow is difficult at ord mdw dpa. Rfd will likely
remain all snow with snow continuing through the overnight hours.

There is a chance that precip could briefly change back over to
light snow before ending Wed morning in the chicago area, but if
that were to happen, not expecting much, if any, accumulation. Ifr
conditions should prevail through the night with periodic lifr
possible. Winds will become light variable later tonight as low
pressure passes nearby, then northwest winds will develop
Wednesday. The northwest winds will increase and become gusty
which should help to usher in some slightly drier air which will
aid in improving CIGS vsby.

- izzi

Lot watches warnings advisories
Il... Winter storm warning... Ilz003-ilz004-ilz005-ilz008 until noon
Wednesday.

Winter weather advisory... Ilz006-ilz010-ilz011-ilz012-ilz013-
ilz014-ilz019-ilz020 until noon Wednesday.

In... None.

Lm... Small craft advisory... Il nearshore waters until 9 pm Wednesday.

Small craft advisory... Lmz743-lmz744-lmz745... 9 am Wednesday to
4 am Thursday.

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 4 mi107 min N 9.9 34°F
CNII2 13 mi17 min N 5.1 33°F 32°F
JAKI2 18 mi107 min N 5.1 G 5.1 36°F
CMTI2 - 9087044 - Calumet, IL 22 mi47 min NW 1.9 G 1.9 36°F 1006.1 hPa (-3.3)36°F
WHRI2 - Waukegan Harbor, IL 24 mi27 min N 13 G 17 29°F
BHRI3 - Burns Harbor, IN 39 mi67 min SSE 4.1 G 6 37°F 1007.5 hPa
KNSW3 - Kenosha, WI 39 mi47 min N 12 G 14 29°F 1008.5 hPa (-2.7)

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
Last
24hr
SE9
G14
SE13
G19
SE17
G23
SE10
G16
S10
G15
S9
G14
S11
G15
S13
G17
S10
G17
S8
G12
S8
G13
S7
G12
S8
G11
S9
S9
G12
S8
S6
G9
S5
S5
S5
G8
S5
SE2
G5
SE3
NW2
1 day
ago
SE3
G7
S6
SE4
S5
S8
G11
SE8
G13
SE8
G11
E8
G11
SE9
G12
SE9
SE9
G14
SE8
G12
SE7
G10
SE8
G12
SE12
G16
SE10
G14
SE10
G16
SE13
G17
SE6
G13
SE8
G17
SE10
G16
SE11
G20
SE9
G14
SE9
G13
2 days
ago
W7
G11
NW7
G12
W8
G12
W9
G14
W6
G11
NW13
G21
NW13
G21
NW13
G17
NW13
G17
NW10
G20
NW10
G20
W7
G13
W9
G12
W8
G15
W6
G11
NW7
G11
S4
SW1
S7
G10
SE4
S4
G7
SE5
G8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi55 minN 91.50 miLight Snow Fog/Mist33°F28°F85%1008.2 hPa
Chicago, Chicago-O'Hare International Airport, IL12 mi56 minN 100.75 miLight Snow Fog/Mist32°F30°F96%1007.2 hPa
Chicago, Chicago Midway Airport, IL17 mi54 minN 51.00 miLight Rain Fog/Mist34°F34°F100%1007.6 hPa

Wind History from PWK (wind in knots)
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
3
AM
4
AM
5
AM
Last 24hrSE11SE12S12S13S14S12S10S7S7S8S8S8S7S7S6S4SE3CalmCalmCalmN3NE6N5N9
1 day agoCalmW4CalmS6S6SE7S10S12SE9SE11SE7SE7S11SE10SE7SE7SE8
G17
SE12
G19
SE11SE11
G21
S12SE8S8SE8
2 days agoNW10NW8N10
G16
NW12
G21
NW10N11
G19
N10NW14N11N11N8
G17
N9N9N9NW10N9NW6NW7NW7N5NW6NW5S4Calm

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)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (6,6,7,8)
      (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.