Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
North Riverside, IL

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:37AMSunset 7:14PM Tuesday March 28, 2017 10:53 AM CDT (15:53 UTC) Moonrise 7:14AMMoonset 8:04PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 928 Am Cdt Tue Mar 28 2017
.small craft advisory in effect through late tonight...
Rest of today..North winds 15 to 25 kt. Mostly cloudy. Waves 3 to 6 ft occasionally to 8 ft.
Tonight..Northeast winds 15 to 20 kt. Partly cloudy. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft late.
Wednesday..Northeast winds 10 to 20 kt. Mostly cloudy. Waves 2 to 4 ft building to 3 to 5 ft occasionally to 7 ft in the afternoon.
Wednesday night..East winds 15 to 25 kt. Chance of rain. Waves 3 to 5 ft occasionally to 7 ft building to 4 to 7 ft occasionally to 9 ft after midnight.
LMZ741 Expires:201703282115;;213361 FZUS53 KLOT 281428 NSHLOT NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 928 AM CDT TUE MAR 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>742-282115-

7 Day Forecast for Marine Location Near North Riverside, IL
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location: 41.84, -87.82     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 281122
afdlot
area forecast discussion
national weather service chicago/romeoville, il
622 am cdt Tue mar 28 2017

Short term
319 am cdt
through tonight...

main forecast concerns/challenges are with precip chances
returning Wednesday night through Thursday night, with a low
chance of thunder mainly south of i80 Thursday afternoon.

Upper level low and surface low/trough continue to depart to the
east this morning, while high pressure to the northwest shifts
southeast. Any associated precip now well east of the area and
expect dry conditions today, outside of some patchy light drizzle
early this morning. There have been some breaks in the stratus
this morning, but think this will be short lived and isolated with
expansive cloud deck still in place over much of the region. The
northern edge of these clouds will steadily drop south today but
the CWA staying in mostly cloudy conditions into the afternoon.

With this cloud cover in place and with a steady northerly wind,
do anticipate slightly cooler conditions today. Have lowered temps
for most locations today with highs around 50 now expected, but
with low 40s still expected for areas near the lake. Quiet/dry
conditions continue tonight with upper level ridging overhead, and
while surface high remains situated over the region.

Rodriguez

Long term
319 am cdt
Wednesday through Monday...

upper level system currently over the western CONUS will slowly
slide east into Wednesday, assisting for returning cloud cover
especially Wednesday. With the closed nature of this system,
expect its progression east to be on the slow side but guidance is
advertising some energy to lift northeast across the region on
Wednesday. Guidance developing QPF mainly to the west of the area
on Wednesday but some is bringing this precip into northern
illinois by Wednesday afternoon. Given the amount of drier air
likely in place, think precip reaching northern illinois Wednesday
may be a tad too quick. So have limited slight chance pops to
mainly west of the i39 corridor in the afternoon. Higher pops
Wednesday night reflective of increasing large scale ascent moving
overhead, and showers likely spreading into much of northern
illinois. Instability looks really meager and so have continued to
leave out any thunder. However, strengthening LLJ could help to
offset this lacking instability, with a few rumbles of thunder
trying to reach the southern CWA late Wednesday night not
completely out of the question. With upper level trough, and
attendant low with lifting boundary approaching the area Thursday,
more widespread showers look to be in place for all areas now
including northwest indiana. Instability axis trying to inch
closer to the southern CWA by Thursday afternoon, as surface
boundary lifts into east central illinois. Guidance advertising
surface wave riding along this boundary close to the CWA border
and if this were to occur, could put a portion of the CWA in the
warm sector. This could support a little more of a chance for
thunder in the afternoon. Did include slight chance thunder for
areas south of i80 Thursday afternoon, but at this time, any
threat of stronger thunderstorms looks to be to the south of the
cwa. Will continue to monitor this period though. The bulk of the
precip should exit Thursday night, but with the potential for
additional energy remaining overhead, some showers are possible
Friday. Dry conditions then expected Friday night into Saturday.

Rodriguez

Aviation
For the 12z tafs...

ceilings continue to be the main forecast challenge and guidance
has had a poor handle on trends overnight leading to low
confidence through the rest of the morning. Early this morning, a
corridor of ifr ceilings stretches from southwest and south
central wi into northern and central illinois. The ifr has been on
the doorstep of the chicago metro area and the terminals all
night but has not been over the terminals for any appreciable
amount of time. The window of opportunity for ifr to move overhead
is shrinking, so have adjusted tafs higher with prevailing MVFR
much of the day. This evening and overnight, confidence in
ceilings remains low with guidance split on either partial
clearing/vfr conditions or low clouds redeveloping. Have high
confidence in winds out of the nne through the day right around 10
kt trending towards ene overnight into tomorrow morning.

Bmd

Marine
258 am cdt
moderate north flow will be in place across lake michigan today
behind low pressure departing from the ohio valley to the mid
atlantic coast and high pressure in place across the canadian
prairies and upper midwest. Low pressure will develop over the
southern plains Tuesday and then lift to missouri midday Thursday.

Winds over lake michigan will veer to the northeast Wednesday and
to the east on Thursday as the low approaches. East winds on
Thursday are expected to be around 30 kt across the south half of
the lake, and there is some potential for a short window of
gales. Winds will back to the northeast as the low continues east
to the mid atlantic coast late in the week, but will remain
moderately strong gusting to 30 kt at times into Friday. Winds
should diminish some over the weekend as high pressure builds into
the western great lakes.

Bmd

Lot watches/warnings/advisories
Il... None.

In... None.

Lm... Small craft advisory... In nearshore waters until 9 pm Tuesday.

Small craft advisory... Il nearshore waters until 3 am Wednesday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CNII2 11 mi23 min NNW 11 G 14 40°F
OKSI2 12 mi113 min N 7 40°F
FSTI2 13 mi113 min N 26 38°F
CHII2 - Chicago, IL 14 mi33 min N 14 G 15 38°F 38°F
JAKI2 14 mi113 min N 8 40°F
CMTI2 - 9087044 - Calumet, IL 17 mi53 min NNW 12 G 16 39°F 1019.4 hPa (+1.6)38°F
WHRI2 - Waukegan Harbor, IL 36 mi73 min N 14 G 18 38°F
BHRI3 - Burns Harbor, IN 38 mi49 min N 11 G 14 38°F 1019.6 hPa
MCYI3 - Michigan City, IN 49 mi33 min N 14 G 16 38°F 38°F

Wind History for Calumet Harbor, IL
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G9
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NW9
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G12
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G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL5 mi60 minN 10 G 1910.00 miOvercast43°F37°F80%1020.4 hPa
Chicago, Chicago-O'Hare International Airport, IL11 mi62 minNNE 1010.00 miOvercast43°F37°F80%1020.1 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi61 minNNE 98.00 miOvercast41°F37°F89%1020.7 hPa
Lewis University Airport, IL22 mi78 minNE 1110.00 miOvercast42°F39°F90%1019.6 hPa
Chicago / West Chicago, Dupage Airport, IL24 mi61 minNE 710.00 miOvercast42°F39°F89%1019.9 hPa

Wind History from MDW (wind in knots)
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Last 24hrNE6E7E7NE7NE5E5NE7NE8NE11NE9NE7NE8N8N6N7NE7N11
G18
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1 day agoS8SW6SW6SW9SW12SW11
G17
SW9SW7SW9SW8SW7SW8SW12W9SW11SW10SW8SW7SW8SW6SW6SW6CalmNE8
2 days agoN10N9N8N7NE9
G15
NE10NE9N11
G18
N9N6NE8--NE5N96565E5E8SE9SE8SE8S7

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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Weather Map
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for Chicago, IL (11,2,3,4)
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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.