Marine Weather and Tides
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 7:06AM||Sunset 4:32PM||Friday December 6, 2019 9:06 AM CST (15:06 UTC)||Moonrise 2:50PM||Moonset 2:18AM||Illumination 72%|
7 Day Forecast for Marine Location Near Chillicothe, ILHourly EDIT Help
Area Discussion for - Central Illinois, IL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
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 StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Marshall County Airport, IL||10 mi||72 min||N 7 G 15||10.00 mi||Overcast||35°F||28°F||78%||1023.4 hPa|
|Peoria - General Downing-Peoria International Airport, IL||19 mi||73 min||N 10 G 18||10.00 mi||Overcast||37°F||28°F||73%||1023.4 hPa|
Link to 5 minute data for KC75
Wind History from C75 (wind in knots)
|1 day ago||W|
|2 days ago||SW||SW||SW||SW||SW||W||SW|
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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 (10,2,3,4)(on/off)  Help
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