Severe Thunderstorm Warning
Severe Thunderstorm Warning
WIC023-043-212045-
/O.NEW.KARX.SV.W.0183.260821T1930Z-260821T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
230 PM CDT Fri Aug 21 2026
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Central Grant County in southwestern Wisconsin...
Southwestern Crawford County in southwestern Wisconsin...
* Until 345 PM CDT.
* At 230 PM CDT, a severe thunderstorm was located 9 miles east of
Prairie Du Chien, moving southeast at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will remain over mainly rural areas of
central Grant and southwestern Crawford Counties, including the
following locations... Wauzeka, Werley, Mount Ida, Beetown,
Stitzer, County Roads K And T, and Porters Bridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4310 9109 4316 9097 4291 9053 4276 9091
TIME...MOT...LOC 1930Z 318DEG 13KT 4309 9097
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Skow
Severe Weather Statement
National Weather Service Chicago/Romeoville
222 PM CDT Fri Aug 21 2026
ILC007-037-111-212000-
/O.CON.KLOT.SV.W.0257.000000T0000Z-260821T2000Z/
De Kalb IL-McHenry IL-Boone IL-
222 PM CDT Fri Aug 21 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHERN DE KALB...SOUTHWESTERN MCHENRY AND SOUTHERN BOONE
COUNTIES...
At 222 PM CDT, a severe thunderstorm was located near Kirkland, or 7
miles northwest of Genoa, moving southeast at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
DeKalb, Sycamore, Genoa, Cortland, Kirkland, Maple Park, Kingston,
and Fairdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4222 8857 4215 8857 4215 8859 4207 8859
4206 8860 4190 8860 4204 8894 4222 8894
4223 8870
TIME...MOT...LOC 1922Z 296DEG 20KT 4214 8882
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RC
Severe Weather Statement
Severe Weather Statement
National Weather Service Chicago/Romeoville
222 PM CDT Fri Aug 21 2026
ILC007-037-111-212000-
/O.CON.KLOT.SV.W.0257.000000T0000Z-260821T2000Z/
De Kalb IL-McHenry IL-Boone IL-
222 PM CDT Fri Aug 21 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHERN DE KALB...SOUTHWESTERN MCHENRY AND SOUTHERN BOONE
COUNTIES...
At 222 PM CDT, a severe thunderstorm was located near Kirkland, or 7
miles northwest of Genoa, moving southeast at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
DeKalb, Sycamore, Genoa, Cortland, Kirkland, Maple Park, Kingston,
and Fairdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4222 8857 4215 8857 4215 8859 4207 8859
4206 8860 4190 8860 4204 8894 4222 8894
4223 8870
TIME...MOT...LOC 1922Z 296DEG 20KT 4214 8882
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RC
Flood Warning
Flood Statement
National Weather Service Lincoln IL
220 PM CDT Fri Aug 21 2026
...The Flood Warning continues for the following rivers in
Illinois...
Sangamon River at Monticello affecting Piatt County.
.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons with interests along this river need to remain aware of the
latest forecasts and associated flood risk for their area. Stay tuned
for further updates on this flooding situation.
Additional information is available at www.weather.gov.
The next statement will be issued late tonight at 230 AM CDT.
&&
ILC147-220730-
/O.CON.KILX.FL.W.0039.000000T0000Z-260823T1800Z/
/MNTI2.2.ER.260816T1055Z.260818T0800Z.260823T1200Z.NO/
220 PM CDT Fri Aug 21 2026
...FLOOD WARNING REMAINS IN EFFECT UNTIL SUNDAY AFTERNOON...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Sangamon River at Monticello.
* WHEN...Until Sunday afternoon.
* IMPACTS...At 13.0 feet, Flooding of agricultural areas begins.
* ADDITIONAL DETAILS...
- At 2:00 PM CDT Friday the stage was 14.7 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 2:00 PM CDT Friday was 15.7 feet.
- Forecast...The river is expected to fall below flood stage Sunday
morning and continue falling to 9.5 feet Friday, August 28.
- Flood stage is 13.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (1 pm)
Location Stg Stg Day/Time Sat Sun Mon
Sangamon River
Monticello 13.0 14.7 Fri 2 pm 13.8 12.8 11.8
&&
LAT...LON 4019 8847 4008 8847 4001 8854 3990 8874
4000 8874 4006 8861
$$
DRH
Flood Statement
National Weather Service Lincoln IL
1132 AM CDT Fri Aug 21 2026
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at Beardstown affecting Schuyler, Cass, Brown and
Morgan Counties.
Illinois River near Havana affecting Cass, Mason and Fulton
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 this evening at 1145 PM CDT.
&&
ILC017-057-125-220445-
/O.CON.KILX.FL.W.0037.000000T0000Z-000000T0000Z/
/HAVI2.1.ER.260816T0245Z.260820T1915Z.000000T0000Z.NO/
1132 AM CDT Fri Aug 21 2026
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Illinois River near Havana.
* WHEN...Until further notice.
* ADDITIONAL DETAILS...
- At 10:45 AM CDT Friday the stage was 16.7 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Friday was 16.9 feet.
- Forecast...The river is expected to rise to a crest of 16.7 feet
this afternoon.
- Flood stage is 14.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (1 pm)
Location Stg Stg Day/Time Sat Sun Mon
Illinois River
Havana 14.0 16.7 Fri 10 am 16.7 16.7 16.6
&&
LAT...LON 4053 8988 4047 8980 4034 9002 4012 9017
4018 9023 4039 9010
$$
DRH
Flood Statement
National Weather Service Lincoln IL
1132 AM CDT Fri Aug 21 2026
...The Flood Warning continues for the following rivers in
Illinois...
Illinois River at Beardstown affecting Schuyler, Cass, Brown and
Morgan Counties.
Illinois River near Havana affecting Cass, Mason and Fulton
Counties.
.The following forecasts are based on observed precipitation, soil
moisture conditions, and forecast precipitation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons with interests along this river need to remain aware of the
latest forecasts and associated flood risk for their area. Stay tuned
for further updates on this flooding situation.
Additional information is available at www.weather.gov.
The next statement will be issued this evening at 1145 PM CDT.
&&
ILC009-017-137-169-220445-
/O.CON.KILX.FL.W.0038.000000T0000Z-000000T0000Z/
/BEAI2.1.ER.260818T0330Z.260822T1800Z.000000T0000Z.NO/
1132 AM CDT Fri Aug 21 2026
...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...
* WHAT...Minor flooding is occurring and minor flooding is forecast.
* WHERE...Illinois River at Beardstown.
* WHEN...Until further notice.
* IMPACTS...At 18.0 feet, Seepage problems begin in the Lost Creek
Drainage and Levee District.
* ADDITIONAL DETAILS...
- At 10:45 AM CDT Friday the stage was 16.2 feet.
- Recent Activity...The maximum river stage in the 24 hours ending
at 10:45 AM CDT Friday was 16.2 feet.
- Forecast...The river is expected to rise to a crest of 16.5 feet
early tomorrow afternoon.
- Flood stage is 14.0 feet.
- http://www.weather.gov/safety/flood
&&
All Times CDT Fld Observed Forecasts (1 pm)
Location Stg Stg Day/Time Sat Sun Mon
Illinois River
Beardstown 14.0 16.2 Fri 10 am 16.5 16.4 16.4
&&
LAT...LON 4018 9023 4012 9017 4008 9037 3999 9046
3999 9058 4015 9043
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
212 PM CDT Fri Aug 21 2026
WIZ046-047-051-052-056>060-062>072-221915-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
212 PM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
Scattered thunderstorms expected through 9 PM. A few storms could
be severe to the west of I-39.
.DAYS TWO THROUGH SEVEN...Saturday through Friday
Scattered storms possible in east-central and southeast Wisconsin
Saturday afternoon. A stronger storm with gusty winds or hail
can`t be ruled out.
Storm chances return Tuesday into Wednesday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated.
$$
Hazardous Weather Outlook
National Weather Service Lincoln IL
138 PM CDT Fri Aug 21 2026
ILZ027>031-036>038-040>057-061>063-066>068-071>073-221845-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
138 PM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for central Illinois, east
central Illinois, southeast Illinois and west central Illinois.
.DAY ONE...Tonight.
Scattered thunderstorms are possible (30-50% chance) this evening
into tonight. Damaging wind gusts and heavy rain are the main
hazards, however isolated large hail and a brief tornado cannot be
ruled out.
Due to recent heavy rainfall, river flooding is occurring on
portions of the Illinois, Sangamon, and Wabash rivers.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Flooding will continue for several days along portions of the
Illinois, Sangamon, and Wabash Rivers.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed later tonight.
$$
NMA
Hazardous Weather Outlook
National Weather Service La Crosse WI
1211 PM CDT Fri Aug 21 2026
WIZ043-044-055-061-222115-
Juneau-Adams-Richland-Grant-
1211 PM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of central
Wisconsin and southwest Wisconsin.
.DAY ONE...This Afternoon and Tonight
A few strong thunderstorms may affect the area during the early
afternoon hours today.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
No action needed.
.EMERGENCY MANAGEMENT COORDINATION...
No webinar is scheduled.
$$
KDS
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1128 AM CDT Fri Aug 21 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-221630-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
1128 AM CDT Fri Aug 21 2026 /1228 PM EDT Fri Aug 21 2026/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...This Afternoon and Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Level 1 of 5 Tornado Risk.
Level 2 of 5 Damaging Wind Risk...up to 60 mph.
Level 2 of 5 Large Hail Risk...up to up to half dollar size.
Limited Flooding Risk.
DISCUSSION...
Scattered showers and thunderstorms are expected this afternoon
and evening. A few storms could become severe with damaging wind
gusts and hail the main threat, but an isolated tornado cannot be
ruled out. The tornado threat and greatest severe threat are
favored west of the Fox Valley and north of Interstate 80.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...
Limited Thunderstorm Risk.
High Swim Risk Porter County, Indiana Lake Michigan Beaches.
Sunday...
High Swim Risk Lake Michigan Beaches.
Tuesday Night and Wednesday...
Limited Thunderstorm Risk.
DISCUSSION...
Isolated to widely scattered showers and thunderstorms are
possible on Saturday, but no severe weather is expected.
Breezy north-northwest winds will result in building waves and
dangerous rip currents at southern Lake Michigan beaches Saturday
afternoon through Sunday.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed this afternoon and evening.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east-southeast at 25 to 30 mph.
$$
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
310 AM CDT Fri Aug 21 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-220815-
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-
310 AM CDT Fri Aug 21 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...TODAY AND TONIGHT
There will be the chance for strong to severe storms today,
especially for areas along and east of the Mississippi River. Storms
are expected to develop through the afternoon hours with damaging
winds and hail being the primary threats, with isolated tornadoes
being secondary. The Storm Prediction Center has highlighted areas
along and east of the river in a Slight Risk, or level 2 of 5, for
severe weather. A Marginal Risk, level 1 of 5, remains for areas
west.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Storm spotter activation is expected today, especially in Illinois
this afternoon and evening.
$$
ERVIN
Hazardous Weather Outlook
National Weather Service Des Moines IA
247 AM CDT Fri Aug 21 2026
IAZ004>007-015>017-023>028-033>039-044>050-057>062-220800-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-
247 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...Today and tonight
Scattered thunderstorms will be possible this morning. The threat
for severe weather is low.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Isolated strong to severe thunderstorms are possible early next
week.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected.
$$
Hazardous Weather Outlook
National Weather Service Des Moines IA
247 AM CDT Fri Aug 21 2026
IAZ070>075-081>086-092>097-220800-
Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-
Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis-
247 AM CDT Fri Aug 21 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...Today and tonight
There is a Marginal Risk (level 1 of 5) for severe weather this
evening. Hail is the main threat.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday
Isolated strong to severe thunderstorms are possible early next
week.
.SPOTTER INFORMATION STATEMENT...
Spotters may be needed today.
$$
