Thursday, April2, 2020
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Marine Weather and Tides
Chillicothe, 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 6:37AMSunset 7:25PM Thursday April 2, 2020 10:34 PM CDT (03:34 UTC) Moonrise 12:58PMMoonset 3:26AM Illumination 76% 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 030030 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 730 PM CDT Thu Apr 2 2020

SYNOPSIS. Issued at 730 PM CDT Thu Apr 2 2020

A few light showers will be possible mainly west of the I-55 corridor tonight into Friday . with a much better chance for showers spreading across all of central and southeast Illinois Friday night into Saturday.

UPDATE. Issued at 730 PM CDT Thu Apr 2 2020

00z/7pm surface analysis shows a slow-moving cold front extending from Minnesota into eastern Kansas. A broken line of showers with a few embedded thunderstorms has developed ahead of the front and is tracking eastward across Iowa/Missouri early this evening. As this convection encounters the dry E/SE boundary layer flow across Illinois, it will steadily diminish as the evening progresses. Despite the dissipating trend, think a few light showers or sprinkles will occur along/west of I-55 this evening as the remnants of the line advance through the area. As the airmass is gradually moistened from the top-down, additional showers will develop and spread into the far western KILX CWA after midnight. Overnight lows will range from the middle 40s near the Indiana border to around 50 degrees west of the Illinois River.

SHORT TERM. (This evening through Friday) ISSUED AT 340 PM CDT Thu Apr 2 2020

Mid afternoon surface map shows weak 1020 mb high pressure over Lake MI and ridging southward over IN and into central parts of KY/TN. A cold front extended from central MN thru western IA into southeast KS and arching back to 1000 low pressure in northeast NM. Filter sunshine thru cirrus clouds east of Lincoln at mid afternoon while thicker mid level clouds pushing eastward across western half of CWa and approaching highway 51. Some showers were in se IA into northern and western parts of MO where isolated thunderstorms west of Kirksville. Milder temps were in the low to mid 60s over CWA with SE winds 8-16 mph and some gusts of 18-25 mph. Fairly low dewpoints were in the mid 30s to lower 40s, with pockets of mid 40s sw CWA.

Upper level ridge over IL through tonight along with drier low levels will likely slow down arrival of shower chances from the west. Cold front to move slowly into nw IL by sunset Friday. Have isolated light rain showers moving into the IL river valley during mid to late evening and kept lower pops of 20-30% overnight into Fri morning from Peoria to Taylorville west. Chances of rain showers increase to 30-50% Fri afternoon over western CWA with slight pops getting as far east as near highway 51. Not as cool as past few nights with cloud cover and se winds. Lows overnight in the mid 40s in eastern IL and upper 40s to around 50F over west CWA.

LONG TERM. (Friday night through Thursday) ISSUED AT 340 PM CDT Thu Apr 2 2020

Cold front to push east of I-55 during overnight and to the Wabash river later Saturday. This will likely spread a band of showers eastward across central and western CWA during Friday night and into eastern/se IL on Saturday. Showers to diminish over the IL river valley during Saturday afternoon behind the front, and diminish over eastern/se IL during Sat night especially by overnight Sat night. Models are weaker with instability on Friday night into Sat evening, and have removed the isolated thunderstorm chances over northern and eastern CWA. Lows Fri night range from upper 30s to near 40 over the IL river valley, to the upper 40s to near 50 from I-57 east. Cooler highs Sat range from low to mid 50s over central IL and upper 50s and lower 60s in southeast IL.

1024 mb high pressure ridge settles into WI and ridging into IL by Sunday morning. Clouds to decrease from nw on Sunday though se IL may stay mostly cloudy much of the day with isolated light rain showers possible near the Wabash river Sunday morning. Milder highs Sat in the lower 60s.

Much of area should be dry Sunday night and have slight chance of showers late Sunday night over western CWA. A warm front to lift northward over CWA on Monday as strong low pressure emerges over eastern CO by sunset Monday. This will bring a better chance of showers and a few thunderstorms especially by Monday afternoon as Gulf of Mexico opens up. Warmer Monday with highs in the lower 70s, with some upper 60s north of I-74. Periods of showers and thunderstorms expected Monday into Tuesday night with Tue being the warmest day in the 70s. Cold front to move se thru CWA Tue night into early Wed. Isolated light rain showers possible Wed especially in eastern/se IL. The 12Z forecast models are slower advecting in colder air on Wed. So highs Wed range from upper 60s nw of the IL river to mid 70s in far se IL. Cooler on Thu with more seasonable highs back in the lower 60s in central IL and mid 60s in southeast IL. High pressure ridge settling se into IL Wed night and Thu though some differences with models with how fast this happens and how strong high pressure ridge is. Stayed close to model consensus of pops on Thu which is slight pops mainly over eastern/se IL.

AVIATION. (For the 00Z TAFS through 00Z Friday evening) Issued at 647 PM CDT Thu Apr 2 2020

VFR conditions will prevail for much of the 00z TAF period . with MVFR ceilings developing at KPIA/KSPI by late Friday afternoon. Mid/high clouds currently blanket central Illinois well ahead of a broken line of showers/thunder across northern and central Missouri. This convection will be dissipating as it tracks eastward into a drier airmass in place across central Illinois: however, think some light showers or sprinkles will occur as the line passes later this evening. Based on radar timing trends and 12z HRW NSSL, have added VCSH to KPIA/KSPI between 03z and 05z . then further east to KCMI between 05z and 08z. Once the sprinkles pass, dry conditions will be on tap for the remainder of the night into Friday morning before additional light showers develop and try to impact mainly the western terminals. Forecast soundings suggest ceilings lowering to MVFR at KPIA by 19z and at KSPI by around 22z . with VFR prevailing further east where the airmass will remain drier. Winds will be E/SE tonight, then will veer to S/SE by Friday afternoon.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

UPDATE . Barnes SYNOPSIS . Barnes SHORT TERM . 07 LONG TERM . 07 AVIATION . Barnes

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshall County Airport, IL10 mi4 hrsSE 810.00 miFair62°F41°F46%1016.9 hPa
Peoria - General Downing-Peoria International Airport, IL19 mi4.7 hrsSE 910.00 miMostly Cloudy63°F37°F40%1017.1 hPa

Link to 5 minute data for KC75

Wind History from C75 (wind in knots)
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G14		E10E9E8E7CalmCalmCalmCalmSE7SE8S11
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1 day agoNE6NE3CalmNE3CalmNE5NE4NE4CalmCalmCalmCalmCalmCalmNE4CalmNW4CalmNE3CalmE3SE3CalmS3
2 days agoCalmCalmE8E7E6NE3CalmCalmNE4NE8E6NE3NE3NE4NE4NE6NE4N4N5N4N5N6N6NE5
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Central Illinois, IL (23,6,7,8)
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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 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.