Tuesday, January19, 2021
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L-36.com

Marine Weather and Tides
Jacksonville, IL

Version 3.4
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8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:16AMSunset 5:07PM Tuesday January 19, 2021 12:07 PM CST (18:07 UTC) Moonrise 11:06AMMoonset 11:52PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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 Jacksonville, IL
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location: 39.73, -90.23     debug


Area Discussion for - Central Illinois, IL
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FXUS63 KILX 191737 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 1137 AM CST Tue Jan 19 2021

SYNOPSIS. Issued at 310 AM CST Tue Jan 19 2021

A weak system will move through northern Illinois this afternoon, bringing a chance for scattered light snow to locations north of I-72. Little to no accumulation is expected. After Tuesday, the rest of the work week will be dry, with highs temperatures gradually climbing into the 40s by Thursday.

UPDATE. Issued at 1051 AM CST Tue Jan 19 2021

No major changes to the going forecast. Tracking area of snow over SE MN and NE IA late this morning which is on track to move ESE across portions of north central and northern Illinois. Have chance PoPs generally south across the I-74 corridor this evening, but the best chance will be farther north. Lowered cloud cover quite a bit south of I-72 where there is currently mostly sunny skies, but clouds should fill back in over the next few hours.

SHORT TERM. (Today and tonight) ISSUED AT 310 AM CST Tue Jan 19 2021

Light precipitation associated with a short wave moving through southern Illinois has exited the southeastern portions of our CWA within the last few hours.

Another weak short wave is set to move across northern Illinois this afternoon and evening. The best chance of precipitation with this wave will be north of the ILX CWA, however, several models indicate isolated pockets of light snow could occur as far south as the I-72 corridor. Increased PoPs slightly between I-74 and I-72 to include a mention of a slight chance of snow. The most likely time for precipitation will be from mid-afternoon through Tuesday evening, although snow could begin as early as Tuesday morning in the far northwest portions of the CWA. During the afternoon, freezing drizzle cannot be completely ruled out, as the minimum temperatures in the cloud layer will be warmer then -10 degrees Celsius, limiting the probability of ice crystals being introduced. However, the better chance for precipitation will be as the cloud layer deepens and the minimum temperature in the cloud layer decreases to near or below -10 degrees Celsius, so have kept the forecast as all snow at this time. Little to no snow accumulation is expected.

Nudged tomorrow's high temperatures up slightly in accordance with both blended and MOS guidance.

LONG TERM. (Wednesday through Monday) ISSUED AT 310 AM CST Tue Jan 19 2021

After the shortwave exists the area late Tuesday, dry weather will take over for the remainder of the work week. Temperatures will gradually climb, peaking with highs in the 40s on Thursday. Mostly sunny skies on Wednesday and Thursday will bring a reprieve from the gloomy conditions that have persisted across much of central Illinois this January. By Friday, a surface high develops in the northern plains, ushering in much cooler air, with Saturday morning wind chills in the single digits across much of central Illinois.

The next chance for precipitation will come late weekend as another system moves through the Midwest. With cold air in place ahead of this system, mixed precipitation is possible, especially at the onset of precipitation. There is still much to be determined with this system in regards to timing, storm track, and impacts.

AVIATION. (For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1134 AM CST Tue Jan 19 2021

An area of MVFR and IFR ceilings currently NW of the Illinois River Valley will spread SE across the terminals this afternoon, especially the I-74 corridor terminals. Meanwhile, an area of snow over SE MN/NE IA will also spread SE across the I-74 terminals tonight as a cold front sweeps across the region. At this time, the best chance for any impacts from snow will fall north of the terminals, but at least some flurries appear likely. Gusty NW winds in the 20-30 kt range are expected for a few hours behind the front, then should gradually diminish in magnitude. Expect skies to eventually clear out during the day Wednesday.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

UPDATE . Deubelbeiss SYNOPSIS . Erwin/Geelhart SHORT TERM . Erwin/Geelhart LONG TERM . Erwin/Geelhart AVIATION . Deubelbeiss


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Municipal Airport, IL3 mi73 minSW 1010.00 miMostly Cloudy33°F28°F81%1025.4 hPa

Link to 5 minute data for KIJX

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Last 24hrW10W10W10W7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW7SW7SW4
1 day agoW15W11W12W11W7W9W6CalmCalmCalmCalmW7W9NW8CalmCalmCalmCalmCalmCalmCalmW6CalmW9
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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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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.
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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 numerous 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.