Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Woodstock, 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 6:57AMSunset 7:05PM Tuesday March 19, 2019 6:28 PM CDT (23:28 UTC) Moonrise 5:32PMMoonset 6:29AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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- 303 Pm Cdt Tue Mar 19 2019
Tonight..South winds 10 to 15 kt. Chance of rain toward morning. Waves 1 to 2 ft.
Wednesday..South winds 10 to 20 kt becoming southwest in the afternoon. Rain in the morning, then a chance of rain in the afternoon. Waves 1 to 3 ft.
Wednesday night..Northwest winds 15 to 20 kt. Chance of rain in the evening. Waves 2 to 4 ft.
Thursday..Northwest winds 10 to 20 kt becoming west 10 to 15 kt in the afternoon. Partly Sunny in the morning then clearing. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon.
LMZ740 Expires:201903200300;;616681 FZUS53 KLOT 192003 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 303 PM CDT Tue Mar 19 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>742-200300-


7 Day Forecast for Marine Location Near Woodstock, IL
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location: 42.32, -88.45     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 192320
afdlot
area forecast discussion
national weather service chicago romeoville, il
620 pm cdt Tue mar 19 2019

Short term
1232 pm cdt
through Wednesday...

seasonal conditions remain in place afternoon with plentiful
sunshine, some scattered cumulus, and readings in the upper 40s
to near 50. Water vapor imagery depicts an increasing cloud
shield out ahead of the upper low currently across the central
plains. Warm advection ahead of the compact upper low will drive
an area of rain across the area late tonight into Wednesday.

Morning raobs indicate an axis of pwat values in excess of 0.6",
not a direct gulf of mexico feed but an axis of increased
moisture. Southwest flow ahead of the low will induce isentropic
ascent and eventually lead to lower level saturation. For tonight
the ascent is more modest, but will increase overnight into more
so Wednesday morning. Ensemble plumes suggest most areas will see
under 0.25" of qpf, but the lift and moisture are supportive of
higher totals mainly along and south of i-80 and into northwest
indiana.

The stronger shortwave energy will pass to our south, but broad
height falls and the main trough axis will still be shifting
through Wednesday afternoon, thus cloudy conditions will persist
with some light rain showers still possible. Given the extensive
cloud cover, expect highs to fall shy of 50 in most areas.

Kmd

Long term
Wednesday night through Tuesday...

246 pm... Forecast concerns include a cold front winds off the
lake Friday... Brief warm up this weekend and another strong cold
front Sunday night Monday.

Weak low pressure will be departing to the east Wednesday evening
as winds shift to the northwest across the area. There may still
be some lingering rain showers Wednesday evening and depending on
how long they persist... They may mix with some wet snow later in
the evening or after midnight but by this time it appears precip
would be ending or perhaps just some flurries.

A cold front is now expected to move across the area early Friday
morning and this is likely to keep temps generally in the 40s but
as winds turn off the lake Friday afternoon... Temperatures will
fall during the mid late afternoon near the lake and likely into
the 30s. High pressure will then build across the area Friday
night with light calm winds expected. This high will be close
enough to the area on Saturday for at least a weak lake breeze
along the il shoreline. Have shifted winds southeasterly there
with modest cooling but a bit early to determine how far inland
and how strong the lake breeze will become. Away from any lake
cooling... High temps Saturday should reach lower mid 50s.

A large area of strong high pressure will move south from canada
into the northern plains on Monday and then weaken as it shifts
south Tuesday. But this high will drive a strong cold front south
across the area Sunday night with much colder air spreading
across the area Monday. Its possible highs on Monday remain in the
30s near the lake and only lower 40s further inland. This cold
front also pushes the precipitation further south faster. In
addition... With the arrival of colder air some change mix with
snow is possible but this system is several days away and its too
early for details... Other then trending colder and windy. Cms

Aviation
For the 00z tafs...

the primary concerns for the chicago area airports through
Wednesday are:
- rain Wednesday morning, with temporary ifr visibility probable,
and ifr ceilings possible even lagging the rain
- scattered rain showers mid-late Wednesday afternoon into early
evening
- southwest winds on Wednesday, likely with gusts at times,
turning west-northwest by early Wednesday evening
high pressure will depart the area this evening with a wind
direction near due south. The wind speeds will inch up in speed
overnight as low pressure approaches. Rain from this system will
spread in near daybreak and for the chicago sites continue through
most of the morning. Temporary ifr visibility is likely,
especially at southern chicago area airports. Confidence is high
in ceilings dropping below 2,000 ft but am less confident in ifr
occurring, at least anything outside of temporary. The timing of
the rain has medium-high confidence. During the afternoon as the
system cold front nears and immediately along it, scattered
showers are favored. Confidence is medium on coverage, and for now
have preserved prevailing but may be more of a vicinity situation.

Some southwest gusts are likely ahead of the front midday
Wednesday, and then the wind direction will turn west-
northwesterly with the frontal passage and occasional gusts should
be seen in the evening.

Mtf

Lot watches warnings advisories
Il... None.

In... None.

Lm... None.

Visit us at http: weather.Gov chicago (all lowercase)
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WHRI2 - Waukegan Harbor, IL 34 mi49 min S 6 G 7 38°F
KNSW3 - Kenosha, WI 39 mi29 min S 11 G 14 39°F 1025.1 hPa (-1.7)
FSTI2 49 mi89 min W 14 49°F
CHII2 - Chicago, IL 54 mi39 min WSW 11 G 15 47°F 24°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burlington Municipal Airport, WI27 mi34 minSSW 510.00 miFair42°F26°F53%1025.1 hPa

Wind History from BUU (wind in knots)
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Last 24hrSW3CalmCalmCalmSW3CalmCalmS4SW4S4S3S3SW4SW5SW4SW4W8SW8SW6SW10
G17
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1 day agoW4NW3CalmCalmNW9NW9NW6CalmW3W3W4CalmW3W5NW7NW6W6W7W10
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW7NW7NW8NW6W9
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NW9NW12
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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.
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 Milwaukee, WI
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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.