Friday, December13, 2019
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Marine Weather and Tides
Urbana, IL

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:04AMSunset 4:29PM Friday December 13, 2019 1:17 AM CST (07:17 UTC) Moonrise 7:00PMMoonset 9:26AM Illumination 98% 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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7 Day Forecast for Marine Location Near Urbana, IL
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location: 40.11, -88.21     debug


Area Discussion for - Central Illinois, IL
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FXUS63 KILX 130506 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 1106 PM CST Thu Dec 12 2019

SYNOPSIS. Issued at 340 PM CST Thu Dec 12 2019

Brisk southwest winds will taper off late this afternoon into this evening. Relatively mild temperatures are in store for tonight and Friday with lows around 30 tonight and highs in the mid 40s Friday, then a cold front will arrive Friday night, bringing temperatures back below normal by Sunday. The cold front will also bring a chance for light rain and snow Saturday, as well as some patchy freezing drizzle as precipitation ends. A stronger storm system will likely arrive late in the weekend and may bring accumulating snow to the region Sunday night and Monday.

UPDATE. Issued at 741 PM CST Thu Dec 12 2019

Earlier high clouds over eastern Illinois have moved out, leaving a stratocumulus deck with a rather sharp edge from near Winchester to the southern tip of Lake Michigan. Temperatures in the clear area have dipped into the mid-upper 30s, while lower 40s linger underneath the clouds. The southeast third of the forecast area should remain fairly clear this evening, before these clouds finally move in from the west. Earlier forecast generally only needed some minor adjustments for the cloud and temperature trends.

SHORT TERM. (This evening through Friday) ISSUED AT 340 PM CST Thu Dec 12 2019

Weak high pressure will bring dry conditions through Friday, as well as lighter winds, although with plenty of continued cloud cover. Temperatures will be relatively mild in the warmer air mass transported into the area with today's southerly winds. Lows tonight should be around 30 and highs Friday in the mid 40s.

LONG TERM. (Friday night through Thursday) ISSUED AT 340 PM CST Thu Dec 12 2019

An upper trough will drive a cold front into central IL Saturday, ushering in colder temperatures again, as well as chances for light rain and snow. Temperatures support a messy mix of rain, snow, and even brief freezing rain and drizzle as surface temperatures approach the freezing mark Saturday morning and again Saturday evening before precipitation fully ends, while a marginal warm layer accompanies the onset of precipitation and some loss of ice aloft accompanies the end of precipitation as moisture depth decreases.

A stronger storm system will arrive in the region Sunday as warm advection aloft precedes a low that appears to be headed east- northeastward up the Ohio River Valley Monday. The 12Z model cycle seems to be more consistent than previous cycles with this track, although some timing and precipitation amount discrepancies continue. Nevertheless, snow looks to be predominant along the I-72 corridor into Danville northward, while a mix of rain, snow, and possibly freezing rain could affect areas closer to I-70 southward. Moderate snow amounts in the neighborhood of a few inches appear likely across much of central IL, although GFS ensemble plumes continue to advertise a wide spectrum of accumulation possibilities.

Dry weather and slightly below normal temperatures are on track for midweek following Monday's system.

AVIATION. (For the 06Z TAFS through 06Z Friday night) Issued at 1106 PM CST Thu Dec 12 2019

VFR conditions expected through the period. While some clouds are occurring as low as 5,000 feet late Thursday evening, any MVFR type clouds expected to remain well to the northwest. Southerly winds are slowly diminishing and are not gusty anymore, but should continue lowering to around 5 knots before sunrise, and remain in that range through Friday afternoon.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

UPDATE . Geelhart SYNOPSIS . 37 SHORT TERM . 37 LONG TERM . 37 AVIATION . Geelhart


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
University of Illinois - Willard, IL6 mi25 minS 710.00 miFair30°F26°F85%1018.5 hPa
Rantoul National Aviation Center Airport, IL13 mi43 minSSE 510.00 miFair29°F26°F90%1017.9 hPa

Link to 5 minute data for KCMI

Wind History from CMI (wind in knots)
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Last 24hrE9SE9SE9SE10SE10S11S13S13S15S18S22
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1 day agoW5SW4SW4SW4SW7SW6S6S8SW8SW9SW10NW4NW5CalmCalmNE3NE7NE9E9E8E8E8E8E8
2 days agoW18
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS 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 Central Illinois, IL (2,6,7,8)
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Ground Weather Radar Station Central Illinois, IL
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weather_mapweather_map weather_map

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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.