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Flood Warning — Cass County, IL, Mason County, IL
Flood Warning
Issued
5:30 AM CDT · Tue, Jun 23 2026
Expires
7:00 AM CDT · Fri, Jun 26 2026
Issuing Office
NWS KILX

Affected Areas

Cass County, IL Mason County, IL

Official Bulletin

261
WGUS43 KILX 210014
FLWILX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Lincoln IL
714 PM CDT Sat Jun 20 2026

...The National Weather Service in Lincoln IL has issued a Flood
Warning for the following rivers in Illinois...

  Sangamon River near Chandlerville affecting Mason and Cass
  Counties.

.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with interests along this river need to remain aware of the
latest forecasts and associated flood risk for their area. Stay
tuned for further updates on this flooding situation.

Additional information is available at www.weather.gov.

&&

ILC017-125-211615-
/O.NEW.KILX.FL.W.0028.260623T1030Z-260626T1200Z/
/CDLI2.1.ER.260623T1030Z.260624T0600Z.260626T0600Z.NO/
714 PM CDT Sat Jun 20 2026

...FLOOD WARNING IN EFFECT FROM LATE MONDAY NIGHT TO FRIDAY
MORNING...

* WHAT...Minor flooding is forecast.

* WHERE...Sangamon River near Chandlerville.

* WHEN...From late Monday night to Friday morning.

* ADDITIONAL DETAILS...
  - At 7:00 PM CDT Saturday the stage was 455.1 feet.
  - Forecast...The river is expected to rise above flood stage
    early Tuesday morning to a crest of 457.4 feet early
    Wednesday morning. It will then fall below flood stage early
    Friday morning.
  - Flood stage is 456.6 feet.
  - http://www.weather.gov/safety/flood

&&

              Fld   Observed           Forecasts (7 pm CDT)
Location      Stg   Stg   Day/Time     Sun   Mon   Tue

Sangamon River
Chandlerville 456.6 455.1 Sat 7 pm CDT 454.3 455.7 457.3

&&

LAT...LON 4013 9007 4006 9002 4002 9016 4003 9043
      4010 9036 4010 9017

$$

MJA