Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Lincolnwood, IL

Version 3.4
What's New / NOTES
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.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 5:52AMSunset 7:44PM Wednesday April 25, 2018 6:44 PM CDT (23:44 UTC) Moonrise 3:07PMMoonset 3:55AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 249 Pm Cdt Wed Apr 25 2018
.small craft advisory in effect until 10 pm cdt this evening...
Tonight..North winds 15 to 20 kt becoming northwest 10 to 15 kt late this evening then diminishing below 10 kt overnight. Clear. Waves 3 to 6 ft subsiding to 1 to 3 ft.
Thursday..Southwest winds 5 to 10 kt becoming southeast 10 to 15 kt in the afternoon. Sunny. Waves 1 to 3 ft.
Thursday night..South winds 10 to 15 kt becoming north 10 to 20 kt after midnight. Slight chance of rain after midnight. Waves 1 ft or less building to 2 to 4 ft after midnight.
Friday..North winds 10 to 20 kt becoming east 5 to 10 kt in the afternoon. Chance of showers in the afternoon. Waves 2 to 4 ft.
LMZ741 Expires:201804260330;;025408 FZUS53 KLOT 251949 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 249 PM CDT Wed Apr 25 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>742-260330-

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


Area Discussion for - Chicago, IL
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Fxus63 klot 252318
afdlot
area forecast discussion
national weather service chicago romeoville, il
618 pm cdt Wed apr 25 2018

Short term
237 pm cdt
through Thursday...

surface high pressure stretching from the southern high plains to
james bay will settle into the local area overnight. The breezy
northeasterly winds of this afternoon will diminish early this
evening. Expect that temperatures will drop off into the mid 30s.

Am thinking that some of the typically cold areas will see lower
temps than that. With current dewpoints running in the low 30s
will use that as a starting point for the corridor from rochelle
to aurora to kankakee but would not be surprised if a few of these
spots fall below 30 overnight. Winds will be lighter and generally
from the southwest Thursday allowing for temps to recover into the
mid 60s as the high settles south. A lake breeze is likely so
lakeshore areas will only see highs in the 50s. An influx of high
clouds ahead of the next disturbance will arrive for the afternoon
which may keep the lake breeze from working too far inland.

Mdb

Long term
309 pm cdt
Thursday night through Wednesday...

overview... After a couple of cold fronts, a summer-like warm up is
expected early next week.

A cold front moves through the forecast area Thursday night, and
guidance continues to back off on how much precip will accompany the
front. I lowered precip chances to slight chance, and i'm not
expecting much rain.

Another cold front and weak low pressure system move through Friday
afternoon night, and the low could bring a better chance of rain
possibly storms. Precip is possible northeast of a dixon to
rensselaer, in line with the best chances over the chicago metro. I
kept thunder chances confined to over lake michigan, but there's a
low chance that an isolated thunderstorm could occur over the metro.

Cooler temperatures follow both cold fronts, especially the second
front Friday. On-shore flow will keep lakeside temps cooler Friday
through the weekend. The coolest day looks to be Friday with lake
side temps in the 40s, and highs in the 50s away from the lake.

High pressure shifts east allowing gusty south winds bring warmer
air to the region early next week. I bumped up high temps, but kept
them lower than what raw model guidance would suggest. 70s are
likely Monday and 80s are possible Tuesday. Increasing cloud cover
may limit warming Tuesday.

Showers and storms are possible mid week, and the ECMWF is quicker
to bring showers into the forecast than the gfs.

Jee

Aviation
For the 00z tafs...

concern is on wind direction and lake breeze on Thursday. High
pressure over the lake will weaken this evening and reduce the
onshore gradient. There is enough of a gradient to support winds
around 9-11 kt for a few hours, but NE winds will slacken and
even go light and variable overnight as high pressure becomes
centered overhead. Weak southwest winds will develop overnight
into Thursday, with a modest increase during the day. A lake
breeze will develop, but at this point most guidance does keep it
east of ord and mdw, though some guidance does bring it close to
mdw. No guidance is showing a strong surge, but mdw could flop to
more of SE for a brief time later afternoon. A cold front will
approach toward the tail end of the 30 hr TAF cycle (late Thursday
evening) with a sharp shift to a NW wind.

Kmd

Marine
309 pm cdt
north winds will continue to diminish through this evening as
high pressure builds overhead. High waves and hazardous conditions
for small craft in the illinois and indiana nearshores will
continue into this evening. After brief southwest winds Thursday,
another cold front will drop over the lake Thursday night with a
push of north winds to 25-30 kt behind it. Yet another cold front
will push through Friday night, though with weaker northerly winds
behind it. Winds become south Sunday into next week. Small craft
advisory conditions are probable in the illinois and indiana
nearshores during the days Monday-Wednesday with gusty offshore
winds.

Mtf jee

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... Il nearshore waters until 10 pm
Wednesday.

Small craft advisory... In nearshore waters until 1 am Thursday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSTI2 2 mi105 min N 17 40°F
OKSI2 3 mi105 min N 5.1 G 7 41°F
CHII2 - Chicago, IL 4 mi55 min N 8 G 8 40°F 35°F
CNII2 7 mi30 min N 8 G 11 41°F 32°F
JAKI2 12 mi105 min NNE 6 G 9.9 41°F
CMTI2 - 9087044 - Calumet, IL 16 mi45 min N 6 G 8.9 41°F 1017.6 hPa (-0.6)35°F
WHRI2 - Waukegan Harbor, IL 30 mi65 min NNE 7 G 9.9 39°F
BHRI3 - Burns Harbor, IN 33 mi45 min NNE 7 G 17 40°F 1018.3 hPa (-0.7)
MCYI3 - Michigan City, IN 41 mi45 min NNE 8.9 G 9.9 39°F 33°F
KNSW3 - Kenosha, WI 45 mi45 min 40°F 1017.9 hPa (-1.4)

Wind History for Calumet Harbor, IL
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N6
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N4
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G9
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G10
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G15
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N11
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N9
G13
N7
G11
NE8
G12
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NE6
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E2
N3
NE5
G8
N6
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N11
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G17
N13
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N12
G18
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G21
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G20
NW17
NW14
G18
N8
G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL13 mi52 minNE 1010.00 miPartly Cloudy47°F28°F50%1018.2 hPa
Chicago, Chicago-O'Hare International Airport, IL14 mi54 minNNE 1110.00 miA Few Clouds47°F28°F48%1017.8 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL18 mi53 minNE 1010.00 miFair45°F30°F58%1019 hPa

Wind History from MDW (wind in knots)
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Last 24hrNE7NE8NE7N7N6N7N13
G19
N16N15
G25
N14N16N11
G21
N15
G20
N17N14
G23
N13NE14
G21
N13NE15
G22
NE12NE13NE13
G19
NE12NE10
1 day agoNE10E9NE8NE5N3CalmNE4NE3N4E3NE4NE7NE5N4N5E10NE7N14NE7N9NE7NE9N8NE8
2 days agoNE14NE13NE9NE8E8E7E5NE5E5NE7NE7NE7NE6NE8NE10NE10NE11NE12N11NE10NE11NE13N14N11

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 (19,4,5,8)
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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.