Friday, December6, 2019
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Marine Weather and Tides
Chillicothe, 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 7:06AMSunset 4:32PM Friday December 6, 2019 9:06 AM CST (15:06 UTC) Moonrise 2:50PMMoonset 2:18AM Illumination 72% Phase: Waxing Gibbous; Moon at 10 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 Chillicothe, IL
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location: 40.91, -89.51     debug


Area Discussion for - Central Illinois, IL
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FXUS63 KILX 061112 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 512 AM CST Fri Dec 6 2019

SYNOPSIS. Issued at 244 AM CST Fri Dec 6 2019

A few light showers are possible over southern Illinois this morning, ahead of an advancing cold front. Behind the front, brisk north winds and cooler temperatures will affect the area today. For this weekend, dry weather and seasonably mild temperatures are expected.

SHORT TERM. (Today and tonight) ISSUED AT 244 AM CST Fri Dec 6 2019

Early morning surface map indicated 1012 mb low pressure over central lower MI, with a cold front extending southwest into west central IL. To the northwest, 1030 mb high pressure was located over eastern South Dakota. A zone of gusty north winds up to 30 mph was occurring in the tighter pressure gradient over IA. Aloft, water vapor imagery and UA analysis indicated a weak shortwave trof from MO southwest into OK. Scattered showers were occurring ahead of this feature from southern MO into southern IL.

These norther edge of the area of scattered showers could affect areas south of I-70 this morning, and have maintained low chance pops. Farther north, a band of post- frontal strato-cu will shift shift across the area this morning. Models are consistent in showing rapid clearing from the northwest this afternoon, but have slowed this trend given the extent of cloud cover to the north. As the stronger CAA and tighter pressure gradient shift in from the northwest this morning, north to northeast wind gusts up to 30 MPH are possible. Winds will gradually decrease this afternoon. Highs should be 10-12 degrees cooler than yesterday, upper 30s northwest to mid/upper 40s south of I-70.

Tonight, the surface ridge axis settles over the area 06-12z, setting up good radiational cooling under light winds and clear skies. Undercut lowest guidance by a degree or two for lows in the low/mid 20s.

LONG TERM. (Saturday through Thursday) ISSUED AT 244 AM CST Fri Dec 6 2019

The ridge axis begins to shift east of the area on Saturday, allowing for dry and seasonable weather. Sunday, warm advection on low to mid level southwest flow will push highs several degrees above normal, mainly into the lower 50s.

The pattern turns more active for the Sunday night through Monday night timeframe, when a longwave trof enters the central US. This will develop low pressure over the southern Plains Sunday night, tracking northeast across IL Monday, and into the Great Lakes Monday night. Given this track and the fact cold air lags the surface system, this should primarily be a rain-maker. Some light snow is possible Monday evening but accumulations are not currently expected.

Modified Arctic high pressure building into the northern Plains on Tuesday, will bring a respectable shot of cold air to the region. The high is forecast to shift overhead by early Thursday, keeping the cold air around for a few days. Guidance shows the peak of the cold air at 850 mb in the negative teens C on Wednesday which would support highs in the low to mid 20s, after morning wind chills in the single digits above and below zero.

AVIATION. (For the 12Z TAFS through 12Z Saturday morning) Issued at 512 AM CST Fri Dec 6 2019

A cold front pushing through central IL, will clear DEC and CMI around 12z. North winds gusting 20-25 kt will be common behind the front through this morning, with a gradual decrease this afternoon. A band of MVFR ceilings behind the front, will affect all sites this morning. These clouds will tend to rise into VFR and scatter this afternoon. This evening high pressure building into the region will bring clear skies and light wind.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

SYNOPSIS . 25 SHORT TERM . 25 LONG TERM . 25 AVIATION . 25


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshall County Airport, IL10 mi72 minN 7 G 1510.00 miOvercast35°F28°F78%1023.4 hPa
Peoria - General Downing-Peoria International Airport, IL19 mi73 minN 10 G 1810.00 miOvercast37°F28°F73%1023.4 hPa

Link to 5 minute data for KC75

Wind History from C75 (wind in knots)
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Last 24hrCalmCalmSW4SW3S8S7SW5CalmSE5SE5SE5CalmSW5SW6SW4SW5SW3NW6N8N6
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2 days agoSW8SW8SW8SW8SW8W7SW8
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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
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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 (10,2,3,4)
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Ground Weather Radar Station Central Illinois, 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.