Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Lake Bluff, 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 5:50AMSunset 7:47PM Thursday April 26, 2018 12:59 AM CDT (05:59 UTC) Moonrise 4:15PMMoonset 4:29AM Illumination 83% 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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LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 948 Pm Cdt Wed Apr 25 2018
Rest of tonight..Northwest winds 5 to 10 kt. Clear. Waves 3 to 5 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.
LMZ740 Expires:201804260900;;039936 FZUS53 KLOT 260248 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 948 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>742-260900-

7 Day Forecast for Marine Location Near Lake Bluff, IL
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location: 42.28, -87.83     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 260544
afdlot
area forecast discussion
national weather service chicago romeoville, il
1244 am cdt Thu apr 26 2018

Update
838 pm cdt
no big changes to the going forecast tonight with quiet conditions
in place. High pressure over the lake will continue to weaken and
support a lighter wind field overnight. Guidance is still pegging light
and variable winds. For sheltered areas this may happen a bit
quicker, and when it does this will promote decent cooling given
the lack of cloud cover and dewpoints in the upper 20s to low 30s.

Therefore we will see spots get to or even below freezing as
mentioned in the afternoon discussion, and have trended toward
cooler met guidance for lows in our outlying locations. Given the
light winds, continued dry low levels, and ample morning sun,
expect a quick morning warmup.

Kmd

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 06z tafs...

vfr conditions are expected through this evening at all sites. Light
winds will become SW less than 10kts this afternoon as a surface
ridge shifts to the east. A lake breeze may move far enough inland
to briefly reach mdw early this afternoon before increasing SW winds
push the lake breeze east of the terminal by late afternoon. A cold
front will then reach rfd late this evening and ord mdw during the
early overnight hours Friday, bringing a period of gusty N winds and
MVFR ceilings. An isolated -shra will be possible for an hour or two
with the cold front passage.

Kluber

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... 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
WHRI2 - Waukegan Harbor, IL 6 mi79 min NW 4.1 G 5.1 39°F
KNSW3 - Kenosha, WI 21 mi59 min 39°F 1015.9 hPa (-1.4)
FSTI2 23 mi119 min WNW 5.1 41°F
OKSI2 28 mi119 min SW 1 G 2.9 44°F
CHII2 - Chicago, IL 29 mi39 min NNW 5.1 G 7 42°F 32°F
CNII2 32 mi29 min N 4.1 G 5.1 40°F 29°F
JAKI2 37 mi119 min N 1.9 G 4.1 42°F
CMTI2 - 9087044 - Calumet, IL 41 mi41 min NW 1.9 G 4.1 39°F 1015.1 hPa33°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL10 mi64 minN 010.00 miFair31°F28°F89%1016.5 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi67 minN 010.00 miFair38°F30°F73%1016.8 hPa
Chicago, Chicago-O'Hare International Airport, IL21 mi68 minN 310.00 miFair39°F28°F67%1016 hPa
Kenosha, Kenosha Regional Airport, WI22 mi66 minWNW 310.00 miFair35°F27°F72%1016.3 hPa

Wind History from UGN (wind in knots)
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Last 24hrN13
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NE7NE4CalmCalmCalmCalm
1 day agoNW4CalmCalmNE3E3N3CalmCalm3NE5E8E8E8E9E10NE7E9NE8NE5NE8N7NE8N7N12
G17
2 days agoNE5N4N4NE5NE5NE6NE7NE8NE11
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N106CalmNW4

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 (1,6,7,8)
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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.