Flood Warning
Flood Statement
National Weather Service Lincoln IL
854 PM CDT Thu Aug 20 2026
...The Flood Warning is extended for the following rivers in
Illinois...
Sangamon River at Monticello affecting Piatt County.
.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive cars
through flooded areas.
Additional information is available at www.weather.gov.
The next statement will be issued Friday morning at 900 AM CDT.
&&
ILC147-211400-
/O.EXT.KILX.FL.W.0039.000000T0000Z-260823T1600Z/
/MNTI2.2.ER.260816T1055Z.260818T0800Z.260823T1000Z.NO/
854 PM CDT Thu Aug 20 2026
...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY MORNING...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Sangamon River at Monticello.
* WHEN...Until Sunday morning.
* ADDITIONAL DETAILS...
- At 8:00 PM CDT Thursday the stage was 15.6 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 8:00 PM CDT Thursday was 15.7 feet.
- Forecast...The river is expected to fall below flood stage early
Sunday morning and continue falling to 9.6 feet Thursday, August
27.
- Flood stage is 13.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (7 pm)
Location Stg Stg Day/Time Fri Sat Sun
Sangamon River
Monticello 13.0 15.6 Thu 8 pm 14.6 13.4 12.4
&&
LAT...LON 4019 8847 4008 8847 4001 8854 3990 8874
4000 8874 4006 8861
$$
Flood Statement
National Weather Service Lincoln IL
853 PM CDT Thu Aug 20 2026
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at Beardstown affecting Morgan, Brown, Schuyler and
Cass Counties.
.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons with interests along this river need to remain aware of the
latest forecasts and associated flood risk for their area. Stay tuned
for further updates on this flooding situation.
Additional information is available at www.weather.gov.
The next statement will be issued Friday morning at 900 AM CDT.
&&
ILC009-017-137-169-211400-
/O.CON.KILX.FL.W.0038.000000T0000Z-000000T0000Z/
/BEAI2.1.ER.260818T0330Z.260822T1800Z.000000T0000Z.NO/
853 PM CDT Thu Aug 20 2026
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Illinois River at Beardstown.
* WHEN...Until further notice.
* IMPACTS...At 18.0 feet, Seepage problems begin in the Lost Creek
Drainage and Levee District.
* ADDITIONAL DETAILS...
- At 7:45 PM CDT Thursday the stage was 16.2 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:45 PM CDT Thursday was 16.2 feet.
- Forecast...The river is expected to rise to a crest of 16.5 feet
early Saturday afternoon.
- Flood stage is 14.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (7 pm)
Location Stg Stg Day/Time Fri Sat Sun
Illinois River
Beardstown 14.0 16.2 Thu 7 pm 16.4 16.5 16.4
&&
LAT...LON 4018 9023 4012 9017 4008 9037 3999 9046
3999 9058 4015 9043
$$
Flood Warning
National Weather Service Lincoln IL
852 PM CDT Thu Aug 20 2026
...Forecast flooding changed from Minor to Moderate severity for the
following rivers in Illinois...
Illinois River near Havana affecting Mason, Cass and Fulton
Counties.
.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.
Additional information is available at www.weather.gov.
The next statement will be issued Friday morning at 900 AM CDT.
&&
ILC017-057-125-211400-
/O.CON.KILX.FL.W.0037.000000T0000Z-000000T0000Z/
/HAVI2.2.ER.260816T0245Z.260823T0000Z.000000T0000Z.NO/
852 PM CDT Thu Aug 20 2026
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and moderate flooding is
forecast.
* WHERE...Illinois River near Havana.
* WHEN...Until further notice.
* ADDITIONAL DETAILS...
- At 7:45 PM CDT Thursday the stage was 16.8 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 7:45 PM CDT Thursday was 16.9 feet.
- Forecast...The river is expected to rise to a crest of 17.0 feet
Saturday evening.
- Flood stage is 14.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (7 pm)
Location Stg Stg Day/Time Fri Sat Sun
Illinois River
Havana 14.0 16.8 Thu 7 pm 16.8 17.0 16.9
&&
LAT...LON 4053 8988 4047 8980 4034 9002 4012 9017
4018 9023 4039 9010
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Des Moines IA
330 PM CDT Thu Aug 20 2026
IAZ004>007-015>017-023>028-033>039-212030-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-
330 PM CDT Thu Aug 20 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...This afternoon and tonight
Isolated strong to severe thunderstorms are possible tonight. A
strong storm with quarter sized hail or 60 mph wind gust may occur
this evening.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Isolated strong to severe thunderstorms are possible Friday night
and again early next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected.
$$
Hazardous Weather Outlook
National Weather Service Des Moines IA
330 PM CDT Thu Aug 20 2026
IAZ044>050-057>062-070>075-081>086-092>097-212030-
Crawford-Carroll-Greene-Boone-Story-Marshall-Tama-Audubon-Guthrie-
Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion-
Mahaska-Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-
Decatur-Wayne-Appanoose-Davis-
330 PM CDT Thu Aug 20 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...This afternoon and tonight
An isolated thunderstorm is possible tonight. Severe weather is
not anticipated at this time.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday
Isolated strong to severe thunderstorms are possible Friday night
and again early next week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected.
$$
Hazardous Weather Outlook
National Weather Service Lincoln IL
204 PM CDT Thu Aug 20 2026
ILZ027>031-036>038-040>057-061>063-066>068-071>073-211915-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
204 PM CDT Thu Aug 20 2026
This Hazardous Weather Outlook is for central Illinois, east
central Illinois, southeast Illinois and west central Illinois.
.DAY ONE...Tonight.
Due to recent heavy rainfall, river flooding is occurring on
portions of the Illinois, Sangamon, and Wabash rivers.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Scattered thunderstorms are possible (30-40% chance) Friday
afternoon and evening. Damaging wind gusts and heavy rain are the
main hazards.
Flooding will continue for several days for portions of the
Illinois, Sangamon, and Wabash Rivers.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated tonight.
$$
NMA
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
141 PM CDT Thu Aug 20 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-211845-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
141 PM CDT Thu Aug 20 2026
This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.
.DAY ONE...THIS AFTERNOON AND TONIGHT
There is a 20 to 30 percent chance for thunderstorms late
tonight, mainly along and north of U.S. Highway 30. The main
hazard is lightning.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
There is a chance for thunderstorms Friday. A few strong to severe
storms are possible in the afternoon and early evening with gusty
winds the primary hazard. The Storm Prediction Center has a
Marginal, level 1 out of 5, Risk of severe storms for the area.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight. Spotter activation
is possible Friday afternoon and evening.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1240 PM CDT Thu Aug 20 2026
WIZ046-047-051-052-056>060-062>072-211745-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1240 PM CDT Thu Aug 20 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...This Afternoon through Tonight
A few thunderstorms may occur later tonight northwest of Madison.
.DAYS TWO THROUGH SEVEN...Friday through Thursday
Scattered thunderstorms are possible Friday into Friday evening.
Gusty winds and small hail may occur.
There are mainly small chances for thunderstorms Saturday
afternoon for portions of east central and southeast Wisconsin.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
