Alert archive / Illinois / Flash Flood Warnings in 2026
Flash Flood Warning 16, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Jun 8, 2026, 6:32 PM CDT for Menard County, Sangamon County, Illinois. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 8, 2026, 6:32 PM CDT (23:32 UTC)
- Expired
- Jun 8, 2026, 8:57 PM CDT
- In force
- 2 hr
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Menard County, IL, Sangamon County, IL
The radar
The Lincoln radar (KILX), 58 km from the middle of the area, began a volume at 23:32 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 8, 6:40 PM CDT | RAIN 5 | 2 Nw Pleasant Plains, IL | Photo relayed via social media of approximately 5 inches in a rain gauge, with flooding of adjacent field in the background. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 117 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 797 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 765 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
228
WGUS53 KILX 082332
FFWILX
ILC129-167-090245-
/O.NEW.KILX.FF.W.0016.260608T2332Z-260609T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
632 PM CDT Mon Jun 8 2026
The National Weather Service in Lincoln has issued a
* Flash Flood Warning for...
Southwestern Menard County in central Illinois...
Northwestern Sangamon County in central Illinois...
* Until 945 PM CDT.
* At 631 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3.5 inches of
rain have fallen. Additional rainfall amounts up to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Pleasant Plains, Tallula and Salisbury.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3992 8999 3993 8999 3995 8995 3997 8976
3987 8972 3984 8999 3985 8999 3987 8999
3989 8999 3990 8999
FLASH FLOOD...RADAR INDICATED
$$
Bumgardner1 follow-up statement
205
WGUS73 KILX 090157
FFSILX
Flash Flood Statement
National Weather Service Lincoln IL
857 PM CDT Mon Jun 8 2026
ILC129-167-090207-
/O.CAN.KILX.FF.W.0016.000000T0000Z-260609T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Menard IL-Sangamon IL-
857 PM CDT Mon Jun 8 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN MENARD AND
NORTHWESTERN SANGAMON COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 700 AM CDT Tuesday for
portions of central, east central, southeast, and west central
Illinois.
&&
LAT...LON 3992 8999 3993 8999 3995 8995 3997 8976
3987 8972 3984 8999 3985 8999 3987 8999
3989 8999 3990 8999
$$
BumgardnerWhat forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lincoln, IL wrote its last area forecast discussion before this flash flood warning went out at Jun 8, 2:41 PM CDT, 3 hours 51 minutes earlier. Its key messages:
- A heavy rain threat will persist through this evening, continuing into the overnight hours south of I-72/Danville. Rates of two inches per hour or greater may lead to localized flash flooding.
- The combination of heat and humidity will lead to heat index values peaking between 95 and 105 degrees on Tuesday and Wednesday. Those sensitive to heat should take extra precautions.
- The threat for severe weather will increase through this week, peaking in the late Wednesday night-Thursday time frame.
Area forecast discussion, Jun 8, 2:41 PM CDT, 3 hours 51 minutes before
Area Forecast Discussion National Weather Service Lincoln IL 241 PM CDT Mon Jun 8 2026 .KEY MESSAGES... - A heavy rain threat will persist through this evening, continuing into the overnight hours south of I-72/Danville. Rates of two inches per hour or greater may lead to localized flash flooding. - The combination of heat and humidity will lead to heat index values peaking between 95 and 105 degrees on Tuesday and Wednesday. Those sensitive to heat should take extra precautions. - The threat for severe weather will increase through this week, peaking in the late Wednesday night-Thursday time frame. && .DISCUSSION... Issued at 241 PM CDT Mon Jun 8 2026 Near record precipitable water values of just over 2" along with an approaching upper low are driving a heavy rain threat today, with multiple reports of 2"/hour rain rates. East central IL will see the greatest threat for heavy rain over the next few hours. An MCV moving out of southeast MO may lead to thunderstorm development in portions of southeastern IL that have yet to see much activity. Some will see a brief break this afternoon, but with more showers/storms capable of heavy rainfall moving in from the west we anticipate the flood threat to persist through at least this evening. A few CAMs depict a convective complex with an associated MCV moving across MO and weakening during the overnight hours. The southern portion of the flood watch has been extended to 7 am to account for this possibility, as well as to account for the persistent near record PW values. The combination of heat and humidity then become a concern for Tuesday and Wednesday. Heat index values in the mid 90s up to a few degrees over 100 are anticipated. Particularly following the extended period of dry and cool conditions experienced toward the end of May/in the first week of June, this period of heat and humidity could have more impact than usual. On Tuesday, a weak moisture boundary may trigger isolated thunderstorms but little relief from the heat will probably result. Instability is quite strong, but with shear limited the severe threat should be limited as well. The main concern would be isolated strong to severe wind gusts. The severe weather threat is forecast to increase later in the week for central and southeast Illinois. Late Wednesday night into Thursday morning, severe storms coming out of the upper Mississippi Valley are forecast to weaken as they move toward central Illinois. The greater threat is anticipated on Thursday afternoon/evening, with SPC delineating a 30% contour approximately near and west of I-55. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1246 PM CDT Mon Jun 8 2026 Primary band of heavy rain and thunderstorms is now working its way through KBMI-KMTO, and should reach KCMI within the hour. Threats are lightning, rain rates in excess of 1" per hour with IFR or lower visibilities, and some gusty south winds. Another round of scattered thunderstorms now in western Illinois is anticipated to affect the TAF sites during the mid to late afternoon hours. MVFR to perhaps IFR ceilings are forecast to develop overnight, primarily east of a line from KPIA-KSPI. && .ILX WATCHES/WARNINGS/ADVISORIES... Flood Watch until 1 AM CDT Tuesday for ILZ027>031-036>038- 041>046-053-055-057. Flood Watch until 1 AM CDT Tuesday for ILZ040-047>052-054-056- 061>063-066>068-071>073. && KEY MESSAGES...AAT DISCUSSION...AAT AVIATION...AAT
Hazardous weather outlook, Jun 8, 2:26 PM CDT, 4 hours 6 minutes before
Hazardous Weather Outlook National Weather Service Lincoln IL 226 PM CDT Mon Jun 8 2026 ILZ027>031-036>038-040>057-061-091930- 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- 226 PM CDT Mon Jun 8 2026 This Hazardous Weather Outlook is for central Illinois, east central Illinois and west central Illinois. .DAY ONE...Tonight. Periods of thunderstorms are expected into this evening, though a few may linger past midnight. While the severe weather threat is low, rainfall rates of 2 to 3 inches per hour may cause localized flash flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms are expected Tuesday evening, and a few may be strong or briefly severe. However, the better chances for severe weather will be Wednesday and especially on Thursday. There also remains a concern for localized flooding. Hot weather will develop on Tuesday, and Wednesday. Heat index values over 95-100 degrees are expected on Tuesday west of I-55, and over all of central and southeast Illinois on Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ062-063-066>068-071>073-091930- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- 226 PM CDT Mon Jun 8 2026 This Hazardous Weather Outlook is for east central Illinois and southeast Illinois. .DAY ONE...Tonight. Periods of thunderstorms are expected into this evening, though a few may linger past midnight. A few of these may briefly be severe, with damaging winds the primary concern. However, a few funnel clouds are also possible. Rainfall rates of 2 to 3 inches per hour may cause localized flash flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered thunderstorms are expected Tuesday through Wednesday, and a few may be strong or briefly severe. However, the better chances for severe weather will be Thursday. There also remains a concern for localized flooding. Heat index values of 95-100 degrees are expected on Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. Copple
In the hours before
Local storm report, Jun 8, 4:13 PM CDT, 2 hours 19 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
413 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0413 PM Flood Canton 40.56N 90.04W
06/08/2026 Fulton IL Emergency Mngr
Several roads inundated with standing water.
&&
RACLocal storm report, Jun 8, 4:25 PM CDT, 2 hours 7 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
425 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0421 PM Rain Neoga 39.32N 88.45W
06/08/2026 M1.55 Inch Cumberland IL Fire Dept/Rescue
0421 PM Rain 5 W Toledo 39.27N 88.34W
06/08/2026 M2.38 Inch Cumberland IL Amateur Radio
0423 PM Rain Toledo 39.27N 88.24W
06/08/2026 M2.24 Inch Cumberland IL Amateur Radio
0424 PM Rain Greenup 39.25N 88.17W
06/08/2026 M1.83 Inch Cumberland IL Amateur Radio
&&Local storm report, Jun 8, 4:39 PM CDT, 1 hour 53 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
439 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0402 PM Rain Coles County Airport 39.47N 88.27W
06/08/2026 M3.84 Inch Coles IL ASOS
ASOS station KMTO Coles Co. Mem AP.
&&
RACLocal storm report, Jun 8, 4:46 PM CDT, 1 hour 46 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
446 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0423 PM Flash Flood Dieterich 39.06N 88.38W
06/08/2026 Effingham IL Broadcast Media
Social media photo reveals feet-deep water
across lawns, seeping into the basements of
several homes in Dieterich.
&&
JRBLocal storm report, Jun 8, 4:49 PM CDT, 1 hour 43 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
449 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0432 PM Rain Lewistown 40.39N 90.16W
06/08/2026 M1.40 Inch Fulton IL Emergency Mngr
Storm total so far.
&&
JRBLocal storm report, Jun 8, 5:03 PM CDT, 1 hour 29 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
503 PM CDT Mon Jun 8 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0453 PM Rain 1 WNW Saint David 40.50N 90.08W
06/08/2026 M3.10 Inch Fulton IL Emergency Mngr
24 hour total.
&&
JRBThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 1:37 AM CDT | Flood Watch | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 23 hr |
| Jun 8, 10:22 AM CDT | Flash Flood Warning | ILX | Morgan, Sangamon | 3 hr |
| Jun 8, 10:26 AM CDT | Special Weather Statement | ILX | Logan, Menard | 34 min |
| Jun 8, 11:22 AM CDT | Special Weather Statement | ILX | Tazewell | 23 min |
| Jun 8, 11:55 AM CDT | Flash Flood Warning | ILX | Moultrie, Shelby | 5 hr |
| Jun 8, 1:11 PM CDT | Special Weather Statement | ILX | Coles, Douglas | 34 min |
| Jun 8, 1:25 PM CDT | Flash Flood Warning | ILX | Coles, Cumberland, Moultrie, Shelby | 3 hr |
| Jun 8, 1:44 PM CDT | Special Weather Statement | ILX | Edgar, Vermilion | 31 min |
| Jun 8, 1:58 PM CDT | Flash Flood Warning | ILX | Coles, Effingham, Jasper | 6 min |
| Jun 8, 2:04 PM CDT | Flash Flood Warning | ILX | Coles, Cumberland, Effingham, Jasper | 3 hr |
| Jun 8, 2:21 PM CDT | Areal Flood Advisory | ILX | Knox | 3 hr |
| Jun 8, 2:28 PM CDT | Areal Flood Advisory | ILX | Champaign, Coles, Douglas, Edgar, Moultrie, Piatt and 1 more | 3 hr |
| Jun 8, 3:46 PM CDT | Special Weather Statement | ILX | Jasper | 29 min |
| Jun 8, 4:16 PM CDT | Areal Flood Advisory | ILX | Fulton | 85 min |
| Jun 8, 5:39 PM CDT | Severe Thunderstorm Warning | ILX | Menard, Sangamon | 36 min |
Nearby
Flash Flood Warnings in Illinois, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.