Monday, January20, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Jacksonville, IL

Version 3.4
NOTICE
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 Monday January 20, 2020 9:02 AM CST (15:02 UTC) Moonrise 3:28AMMoonset 1:34PM Illumination 21% Phase: Waning Crescent; Moon at 25 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
    EDIT      (on/off)   Help


7 Day Forecast for Marine Location Near Jacksonville, IL
   Hourly   EDIT   Help
location: 39.73, -90.23     debug


Area Discussion for - Central Illinois, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KILX 201133 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 533 AM CST Mon Jan 20 2020

SYNOPSIS. Issued at 232 AM CST Mon Jan 20 2020

A very cold day is on tap again today, with scattered flurries. A dusting of snow could develop this afternoon for portions of west- central Illinois, west of Springfield to Effingham, but most areas will just see flurries from any clouds that pass by. Highs will be limited to the mid-teens to mid 20s. Some clearing is expected tonight, setting up another cold night, with lows in the single digits to mid-teens.

SHORT TERM. (Today and tonight) ISSUED AT 232 AM CST Mon Jan 20 2020

High pressure will generally be present across the region in the short term. However, a weak shortwave embedded in the mid-level flow will trigger some enhanced snow showers in west-central Illinois today. The potential for any measurable snowfall will be low, so have continued only slight chance PoPs for our SW counties, southwest of Rushville to Springfield to Effingham. Flurries have been occurring from any cloud cover that has drifted across the area early this morning, so have included flurries in at least the eastern half of the CWA this morning. We can't rule out that flurries will not persist even this afternoon outside of the slight chance PoP areas, as clouds are expected to generally dominate the skies.

The departure of the shortwave to the S-SE tonight should improve the chances of clearing skies from north to south. Night-time clearing can be tricky to pinpoint due to subsidence inversions limiting the scouring out of clouds. However, have opted to follow the optimistic clearing trend indicated in the high-resolution guidance. Clearing skies and light winds could set up a spike down of low temps below guidance numbers. Went a couple degrees below MOS guid, especially in NW counties where some snow cover remains. Lows should bottom out around 5 above near Galesburg, with low to mid-teens east of I-55.

LONG TERM. (Tuesday through Sunday) ISSUED AT 225 AM CST Mon Jan 20 2020

Low pressure will bring the possibility for wintry weather and additional rainfall to the region midweek. The period starts dry, however, under the influence of high pressure centered along the Ohio Valley. South flow over central Illinois will result in non- diurnal temperature trends Tuesday night with temps either holding steady in the lower 20s or inching up.

By Wednesday, surface high will shift east across the Appalachians while a shortwave trough moves east across the plains and across the mid/upper Mississippi Valley. This relatively low amplitude wave will encounter very dry air in place across the Midwest which may struggle to saturate. Still, should eventually see some snow shifting into portions of central Illinois later in the day Wednesday.

Forecast becomes more complex Thursday through Friday as a series of shortwaves move across the mid section of the country. The main players will be a rather strong northern stream shortwave ejecting from an upper low over the Pacific Northwest, and a southern stream wave coming across the Baha Peninsula and into the southern plains midweek. The degree of phasing and interaction between these waves varies between model solutions, but in general, expect the northern wave to close off over the central plains Thursday and then dig across the lower or mid Mississippi Valley Friday. While there is a good likelihood for precip with this system, model differences remain stark enough at this distance that it's hard to pin down p-type and accumulation totals. Looking at soundings and temps aloft from both the GFS and ECMWF, though, does suggest that there will be varying precip types with this system including the possibility for some accumulating snow and ice, along with additional rain.

Precip chances will diminish through the day Saturday as the system exits east. While there may be a brief cooldown as cold air overspreads the Midwest in its wake, upper ridge quickly returns across the middle of the country which should result in temperatures trending back up above normal Sunday into Monday.

AVIATION. (For the 12Z TAFS through 12Z Tuesday morning) Issued at 533 AM CST Mon Jan 20 2020

Remnant lake-effect clouds in the low VFR category have expanded westward from eastern Illinois, producing scattered flurries. An IFR cloud deck has developed over DEC, but they are an outlier of lower ceilings. Some MVFR cigs are approaching the area from the west as well, associated with a mid-level shortwave. PIA and SPI will have the better chances of seeing the MVFR ceilings from that feature this morning, as clouds advance from western Illinois. Flurries will likely accompany any cloud layer that occurs today, in the cold airmass. While CMI has seen their vis dip to MVFR at 4SM -SN, most area will not see any reduction in vis from snow showers.

Clouds will begin to thin and clear out tonight, starting near PIA and advancing to the E-SE with time. A nocturnal inversion could slow that clearing a bit, but for now have gone with a quicker scenario.

The overall pressure pattern will not change much during this TAF period, keeping steady NW winds at 5-10 kts. A variable wind could develop overnight, as the ridge axis inches closer to Illinois.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

SYNOPSIS . Shimon SHORT TERM . Shimon LONG TERM . Deubelbeiss AVIATION . Shimon


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Municipal Airport, IL3 mi67 minWNW 510.00 miFair9°F5°F85%1037.9 hPa

Link to 5 minute data for KIJX

Wind History from IJX (wind in knots)
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrNW15
G21
NW17
G23
W13
G20
W14W17
G20
W15W15NW12
G17
W11W11NW9NW10NW11NW9NW7NW7NW6NW3NW4W4NW4NW3W5NW5
1 day agoW16
G21
W16
G22
W18
G28
W20
G28
W21
G30
W21
G30
W23
G30
W25
G29
W18
G26
--W24
G32
NW18
G29
W22
G31
NW15
G23
W20
G31
W14
G19
NW19
G26
W11W19
G22
W16W17
G25
NW17
G20
W18
G22
NW13
2 days agoE11E18
G21
E17E14
G18
E16
G21
E13
G21
E10SE11E8SE7SE5SE4SE4SE4SE4SE4S3S3S6S9S7SW8SW9W17
G24

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
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 (10,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Central Illinois, IL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 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.