Saturday, April20, 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 6:00AMSunset 7:38PM Saturday April 20, 2019 11:53 AM CDT (16:53 UTC) Moonrise 9:12PMMoonset 7:06AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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:201904202115;;218059 Fzus53 Klot 201416 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 916 Am Cdt Sat Apr 20 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>742-202115- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 916 Am Cdt Sat Apr 20 2019
.small craft advisory in effect until 9 pm cdt this evening...
Rest of today..North winds 20 to 25 kt diminishing to 10 to 20 kt late. Sunny. Waves 4 to 6 ft occasionally to 8 ft.
Tonight..Northwest winds 10 to 15 kt becoming southwest 5 to 10 kt after midnight. Clear. Waves 3 to 6 ft occasionally to 8 ft subsiding to 1 to 3 ft.
Sunday..South winds 10 to 20 kt. Sunny. Waves 1 to 3 ft.
Sunday night..South winds 10 to 20 kt. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 to 3 ft.
LMZ741


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


Area Discussion for - Chicago, IL
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Fxus63 klot 201559
afdlot
area forecast discussion
national weather service chicago romeoville, il
1059 am cdt Sat apr 20 2019

Update
1056 am cdt
very dry conditions in place per morning upper air soundings and
amdar data, which depict a sharp drop off in dewpoints above the
near surface layer, and mixing is supporting lower dewpoints that
guidance would suggest, and this would create an elevated fire
danger. Expect winds to remain elevated through early afternoon
before a more significant drop off late this afternoon and evening
when the surface ridge will shift overhead.

Kmd

Short term
330 am cdt
through Sunday...

no significant weather concerns in the short term. Gusty northerly
winds are likely today, especially over the eastern CWA where
gusts over 30 mph are possible later this morning into the early
afternoon. As cyclone moves east today will probably see winds
begin to ease slightly later this afternoon. In addition, will
probably see a more traditional lake breeze develop this afternoon
with somewhat lighter winds behind the lake breeze and falling
temps. Near the lake, likely see temps in the mid to upper 40s
most of the day. Big warm up still on tap for Sunday with highs
well into the 70s and perhaps making a run at 80 over north
central il.

- izzi

Long term
211 am cdt
Sunday night through Friday...

the warm conditions on Sunday will continue on Monday as
temperatures are likely to top out well into the 70s area-wide.

However, in spite of the mild conditions on Monday, the weather
will become a little more unsettled across the upper midwest into
the western great lakes region by Monday in response to the next
area of low pressure expected to shift across the mid and upper
mississippi valley. Because of this, there will be a bit more
cloud cover and some chances for showers and thunderstorms later
in the day and into Monday night. It does, however, appear that
the best chance of precip during the day Monday may remain north
of the area.

A cold front is likely to drop southward over the area following
the passage of this surface low on Tuesday. Shower and
thunderstorm chances will continue in the vicinity of this front
on Tuesday, which may set up over central il and in later in the
day. North of this boundary cooler weather (low 60s inland) can be
expected Tuesday, with the coolest conditions (low to mid 50s)
likely near the lake due to onshore flow.

By mid to late week, conditions should be mainly dry across much
of the area, with seasonable temperatures in the 60s (warmest
inland). However, the prospects of continued periods of onshore
flow through the week will result in cooler weather near lake
michigan.

Kjb

Fire weather 335 am cdt
very dry conditions with deep mixing should result in min rh
values dropping below 25% over about the western 2 3rd of the
cwa. Farther east, look strong northerly winds, but somewhat
higher rh values, so for the most part the stronger winds look to
not overlap the area of strongest winds. Area-wide, fuel stick
moisture values are forecast to be above red flag criteria (well
above over the eastern half of the cwa, so while there will be
some heightened level of fire danger, it would appear the threat
of reaching red flag criteria is quite low.

- izzi

Aviation
For the 12z tafs...

only weather related item of note is the wind. Llws threat will
subside as gustiness develops again this morning. Winds will
probably begin to slowly ease later this afternoon with winds
quickly going calm or light variable this evening.

- izzi

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... Nearshore waters
until 9 pm Saturday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSTI2 4 mi114 min NNW 46 43°F
45174 7 mi34 min NNW 18 G 21 41°F 41°F5 ft1011.9 hPa34°F
CHII2 - Chicago, IL 10 mi34 min NNW 25 G 28 42°F 33°F
CNII2 13 mi24 min NW 13 G 22 46°F 26°F
JAKI2 18 mi114 min N 20 G 31 44°F
CMTI2 - 9087044 - Calumet, IL 22 mi54 min NNW 18 G 26 44°F 1010.3 hPa (+1.0)33°F
WHRI2 - Waukegan Harbor, IL 24 mi48 min NNE 21 G 26 46°F
BHRI3 - Burns Harbor, IN 39 mi74 min N 11 G 14 41°F 1010.2 hPa
KNSW3 - Kenosha, WI 39 mi54 min N 19 G 22 47°F 1011.9 hPa (+0.7)
45170 43 mi34 min N 18 G 21 41°F 43°F7 ft33°F
MCYI3 - Michigan City, IN 46 mi34 min N 25 G 29 42°F 33°F

Wind History for Calumet Harbor, IL
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Last
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N24
G33
N21
G31
NW18
G28
N21
G29
N22
G28
N20
G33
N18
G26
N22
G29
N22
G29
N21
G28
N17
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N16
G21
N13
G18
N15
G21
N14
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N16
G21
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G25
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G24
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NW18
G26
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W4
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N9
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N7
G10
N8
G11
N6
G9
N6
N6
G10
N10
G13
N13
G17
N11
G14
N16
G23
N19
G26
N18
G24
N19
G28
N22
G31
N18
G25
N17
G30
N21
G28
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G26
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SE10
G13
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G16
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G18
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G24
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G15
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G22
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G20
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G17
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G23
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G20
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G24
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G23
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G19
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G17
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G21
SW9
G16
SW9
G13
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G12
W5
G10
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G9
W4
G8
W6
G9
W4

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi62 minN 17 G 3010.00 miFair57°F15°F19%1011.7 hPa
Chicago, Chicago-O'Hare International Airport, IL12 mi63 minNNE 20 G 2810.00 miA Few Clouds and Breezy55°F17°F22%1010.9 hPa
Chicago, Chicago Midway Airport, IL17 mi61 minNNE 19 G 2910.00 miA Few Clouds and Breezy53°F16°F23%1011 hPa

Wind History from PWK (wind in knots)
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Last 24hrN19
G29
N16
G30
N19
G28
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G37
N18
G40
N23
G36
N17
G34
N15
G24
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G27
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G27
N12
G23
N13
G24
N12
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N11N12
G20
N6
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N7N8N12
G19
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G30
1 day agoNW8NW10NW9NW12NW13
G18
NW10NW10
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NW8
G16
N7N9
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NE17
G26
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G24
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G27
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G30
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G30
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G28
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G32
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G32
NE18
G35
2 days agoE7--S6NE8--S13
G25
S21
G32
S13S10
G19
S16
G28
S18
G29
SW14
G26
S16
G22
SW12
G18
SW9
G18
SW8W9
G18
W8W6NW11W6NW4W5NW12
G19

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    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (12,3,4,5)
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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.