Monday, October25, 2021
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Marine Weather and Tides
Chillicothe, IL

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:19AMSunset 6:04PM Monday October 25, 2021 2:21 PM CDT (19:21 UTC) Moonrise 9:11PMMoonset 12:10PM Illumination 77% Phase: Waning Gibbous; Moon at 20 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 251743 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 1243 PM CDT Mon Oct 25 2021

SYNOPSIS. Issued at 1056 AM CDT Mon Oct 25 2021

Blustery conditions will be noted across central Illinois today as winds gust over 30mph and patchy drizzle lingers into the afternoon. High temperatures will range from around 50 degrees northwest of the Illinois at Galesburg . to the middle to upper 50s south of I-70.

UPDATE. Issued at 1056 AM CDT Mon Oct 25 2021

Low pressure near Lafayette, Indiana continues to track slowly off to the east this morning. Gusty N/NW winds have developed on the back side of the low, with latest obs showing peak gusts of 30-35mph along/west of I-55. The stronger winds will gradually work their way eastward toward midday, but should remain just below Wind Advisory criteria. Will maintain the current Advisory along/northeast of a Bloomington to Danville line, but think the strongest winds will remain to the N/NE of the area. In addition to the winds, patchy drizzle will continue through early afternoon before gradually ending from west to east later in the day. High temperatures will remain in the 50s across the board, but will feel even chillier due to the winds.

SHORT TERM. (Today and tonight) ISSUED AT 321 AM CDT Mon Oct 25 2021

Today will be blustery as the upper-level wave and attendant surface low lifts out of the region. Gradient winds on the back side of this system will offer sustained 15-20 mph through much of the day, with the potential for occasional 45 mph gusts to mix down given steep low-level lapse rates. These higher-end gusts will mainly be confined to NE Illinois, but could bleed south along the I-74 corridor. For this reason, a Wind Advisory is in effect until early afternoon.

Light rain will linger through late morning, ending from west to east by afternoon as the upper wave and surface low depart. Clouds will persist through much of the day, especially east of I-55, thanks to a good northern fetch off Lake Michigan. Elsewhere, skies will become clear ahead of an amplified ridge of high pressure.

The main forecast concern for tonight is the potential for frost. As skies begin to clear across our west, temperatures will bottom out in the mid 30s. Confidence in widespread frost is highest west of the Illinois River Valley, and it's possible a Frost Advisory will be collaborated later in the day.

LONG TERM. (Tuesday through Sunday) ISSUED AT 321 AM CDT Mon Oct 25 2021

Pleasant fall weather returns Tuesday into Wednesday as the upper ridge axis builds across the region. Temperatures will moderate into the 60s beneath abundant sunshine and the return of southerly flow.

Notable spread remains among the ensemble clusters for the late week system. Regardless of the strength and position of the main upper-level wave, it appears central Illinois will be positioned on the north side of a large frontal system. Such positioning will limit our convective potential, with only a few elevated storms expected. The QPF associated with this late week system will remain a challenge until the ensembles exhibit better clustering in the position and strength of the incoming upper- level wave. One trend that has developed over the past few runs is a delay in the onset of precipitation, which now appears to arrive early Thursday morning.

The pattern then looks wet and unsettled through the remainder of the work week. By the weekend, there is better semblance in a return to drier and seasonable weather as the upper-level pattern becomes zonal.

Despite an unusually mild October, it appears that the pendulum is about to swing toward much cooler temperatures come early November. This is evident in the latest 8-14 day outlook from CPC.

AVIATION. (For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1243 PM CDT Mon Oct 25 2021

MVFR ceilings will persist at the central Illinois terminals for the balance of the afternoon. Latest visible satellite imagery is showing clearing upstream across eastern Iowa: however, additional diurnal clouds are forming on the edge of the clearing area. End reuslt will be a delay in any significant clearing across central Illinois until closer to sunset. Based on satellite timing tools and HRRR forecast, have scattered the ceiling at KPIA by 23z . then further E/SE to KCMI by 03z. Winds will be strong/gusty through the afternoon as well . with gusts near 30kt along/east of I-55. As high pressure builds into the region from the west, gusts will subside by sunset or shortly thereafter . then will decrease to less than 10kt across the board overnight.

ILX WATCHES/WARNINGS/ADVISORIES. Flash Flood Watch until 4 PM CDT this afternoon for ILZ051.

Wind Advisory until 1 PM CDT this afternoon for ILZ038-043>046.



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


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshall County Airport, IL10 mi47 minN 13 G 2010.00 miOvercast50°F44°F79%1014.2 hPa
Peoria - General Downing-Peoria International Airport, IL19 mi28 minN 11 G 2310.00 miOvercast52°F43°F72%1014.5 hPa

Link to 5 minute data for KC75

Wind History from C75 (wind in knots)
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Last 24hrNE8E13
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1 day ago0E4SE3SE5E3E4E4E4E6E7E8E9
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2 days agoW5W7NW5W6W4W50NW3NW3NW30000000000NE5E3E8E4

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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