Alert archive / Illinois / Flash Flood Warnings in 2026
Flash Flood Warning 59, NWS Lincoln, IL
NWS Lincoln, IL issued this flash flood warning at Aug 14, 2026, 4:07 AM CDT for 4 counties in Illinois. It was in force for 6 hr. 27 reports 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
- Aug 14, 2026, 4:07 AM CDT (09:07 UTC)
- Expired
- Aug 14, 2026, 10:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Fulton County, IL, Knox County, IL, Peoria County, IL, Tazewell County, IL
The radar
The Lincoln radar (KILX), 66 km from the middle of the area, began a volume at 09:10 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 |
|---|---|---|---|
| Aug 14, 6:10 AM CDT | RAIN 2.08 | Delavan, IL | Storm total, still raining. |
| Aug 14, 6:45 AM CDT | RAIN 3.3 | 1 Wsw London Mills, IL | Mesonet station LNMI2 0.7 W London Mills. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.06 | 1 Ne Trivoli, IL | Cocorahs station IL-PR-23 Trivoli 0.4 E. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.1 | 2 Wsw Deer Creek, IL | Cocorahs station IL-TZ-40 Morton 5.1 E. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.33 | 1 Ene Morton, IL | Cocorahs station IL-TZ-42 Morton 1.5 ENE. |
| Aug 14, 7:00 AM CDT | RAIN 2.36 | 1 Nne Peoria Intl Airpo, IL | ASOS station KPIA Peoria Intl Arpt. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.4 | 1 Ssw Morton, IL | CO-OP Observer station MRTI2 Morton. |
| Aug 14, 7:00 AM CDT | RAIN 2.4 | 1 W Galesburg, IL | CO-OP Observer station GBGI2 Galesburg. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.44 | 1 Ssw Morton, IL | Cocorahs station IL-TZ-1 Morton 1.0 S. |
| Aug 14, 7:00 AM CDT | RAIN 2.51 | 1 Nw Knoxville, IL | Cocorahs station IL-KX-9 Knoxville 0.7 NW. |
| Aug 14, 7:00 AM CDT | RAIN 2.53 | 4 Ssw Alta, IL | Cocorahs station IL-PR-8 Peoria 3.4 WNW. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 2.71 | 2 Sse East Peoria, IL | Cocorahs station IL-TZ-54 East Peoria 1.9 SSW. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 3.01 | Saint Augustine, IL | Cocorahs station IL-KX-30 St. Augustine 0.1 NNW. |
| Aug 14, 7:00 AM CDT | RAIN 3.63 | 4 Nnw Hopedale, IL | Cocorahs station IL-TZ-50 3 NW Hopedale. The period of the Rain event was 24 hours. |
| Aug 14, 7:00 AM CDT | RAIN 4.25 | 1 Ssw Canton, IL | CO-OP Observer station CANI2 Canton. |
| Aug 14, 7:00 AM CDT | RAIN 4.32 | 3 Ssw Dillon, IL | Cocorahs station IL-TZ-52 , IL. |
| Aug 14, 7:11 AM CDT | RAIN 2.07 | 3 Ene East Peoria, IL | Mesonet station EW6160 East Peoria. The period of the Rain event was 24 hours. |
| Aug 14, 7:15 AM CDT | RAIN 2.99 | 3 E South Pekin, IL | Mesonet station FW1256 Pekin. The period of the Rain event was 24 hours. |
| Aug 14, 7:15 AM CDT | RAIN 3.17 | Pekin, IL | Mesonet station FW0283 Pekin. The period of the Rain event was 24 hours. |
| Aug 14, 7:19 AM CDT | RAIN 2.36 | Delong, IL | Mesonet station FW5864 Delong. The period of the Rain event was 24 hours. |
| Aug 14, 7:19 AM CDT | RAIN 2.68 | 1 Se West Peoria, IL | Mesonet station AW321 PEORIA. The period of the Rain event was 24 hours. |
| Aug 14, 7:20 AM CDT | RAIN 2.63 | 1 Nnw Galesburg, IL | Mesonet station DW8259 Galesburg. The period of the Rain event was 24 hours. |
| Aug 14, 8:00 AM CDT | RAIN 2.15 | 2 Ne Mackinaw, IL | CO-OP Observer station MACI2 Mackinaw 2NE. |
| Aug 14, 8:00 AM CDT | RAIN 2.37 | 3 Wnw Peoria Heights, IL | CO-OP Observer station PRWI2 Peoria 5 NW. |
| Aug 14, 8:00 AM CDT | RAIN 2.8 | Yates City, IL | CO-OP Observer station YATI2 Yates City. |
| Aug 14, 8:00 AM CDT | RAIN 3.15 | 3 S Dahinda, IL | Cocorahs station IL-KX-27 2 SSE Dahinda. |
| Aug 14, 8:00 AM CDT | RAIN 3.58 | 3 Wsw Mackinaw, IL | Cocorahs station IL-TZ-10 Tremont 3.6 E. |
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 00:00Z, 9.1 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
- 514 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 258 m²/s²
- 0-3 km storm-relative helicity
- 440 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
193
WGUS53 KILX 140907
FFWILX
ILC057-095-143-179-141515-
/O.NEW.KILX.FF.W.0059.260814T0907Z-260814T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lincoln IL
407 AM CDT Fri Aug 14 2026
The National Weather Service in Lincoln has issued a
* Flash Flood Warning for...
Southern Peoria County in central Illinois...
Tazewell County in central Illinois...
Northern Fulton County in west central Illinois...
Southern Knox County in west central Illinois...
* Until 1015 AM CDT Friday.
* At 407 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Peoria, Pekin, Galesburg, East Peoria, Morton, Canton, Washington,
Bartonville, Creve Coeur, West Peoria, Abingdon, Knoxville,
Marquette Heights, Farmington, Tremont, Elmwood, Bellevue,
Mackinaw, Delavan and Cuba.
This includes the following State Parks...
Banner Marsh State Fish and Wildlife Area, Powerton Lake State Fish
and Wildlife Area, Rice Lake State Fish and Wildlife Area, Spring
Lake State Fish and Wildlife Area and Mackinaw River State Fish and
Wildlife Area.
This includes the following highways...
Interstate 74 between mile markers 48 and 70...and
between mile markers 73 and 108.
Interstate 155 between mile markers 12 and 31.
Interstate 474 between mile markers 0 and 14.
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.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4099 9044 4071 8944 4057 8927 4033 8927
4032 8971 4044 8971 4047 9045
FLASH FLOOD...RADAR INDICATED
$$
251 follow-up statement
543
WGUS73 KILX 141514
FFSILX
Flash Flood Statement
National Weather Service Lincoln IL
1014 AM CDT Fri Aug 14 2026
ILC057-095-143-179-141524-
/O.EXP.KILX.FF.W.0059.000000T0000Z-260814T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fulton IL-Knox IL-Peoria IL-Tazewell IL-
1014 AM CDT Fri Aug 14 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 1015 AM CDT THIS MORNING FOR
SOUTHERN PEORIA, TAZEWELL, NORTHERN FULTON AND SOUTHERN KNOX
COUNTIES...
Flood waters will continue to gradually recede this morning.
Flooding is no longer expected to pose a significant threat. Please
continue to heed remaining road closures and avoid areas of standing
water.
&&
LAT...LON 4099 9044 4071 8944 4057 8927 4033 8927
4032 8971 4044 8971 4047 9045
$$
AATWhat 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 Aug 14, 1:53 AM CDT, 2 hours 14 minutes earlier. Its key messages:
- Flash flooding is a concern along and north of the I-74 corridor ongoing. Some locations have received 2-4 inches so far.
- There is an area of convection moving south across central and southeastern IL this morning that poses a heavy rain and damaging wind threat. The next round of convection will move in late this evening into the overnight hours. A slight risk for severe weather is in place for the northwestern part of our CWA from the SPC.
- Heat index values of 105 to 110 degrees will continue into the weekend each afternoon, in areas near and south of I-72. The heat is expected to spread northward across the forecast area by Saturday.
Area forecast discussion, Aug 14, 1:53 AM CDT, 2 hours 14 minutes before
Area Forecast Discussion National Weather Service Lincoln IL 153 AM CDT Fri Aug 14 2026 .KEY MESSAGES... - Flash flooding is a concern along and north of the I-74 corridor ongoing. Some locations have received 2-4 inches so far. - There is an area of convection moving south across central and southeastern IL this morning that poses a heavy rain and damaging wind threat. The next round of convection will move in late this evening into the overnight hours. A slight risk for severe weather is in place for the northwestern part of our CWA from the SPC. - Heat index values of 105 to 110 degrees will continue into the weekend each afternoon, in areas near and south of I-72. The heat is expected to spread northward across the forecast area by Saturday. && .DISCUSSION... Issued at 152 AM CDT Fri Aug 14 2026 The next round of heavy rain and strong storms have entered the northern part of the CWA. It will continue to sink southward throughout the overnight hours into the morning. The environment is still quite unstable and as these storms push south, they should move into an area of stronger CAPE values. Effective wind shear is around 45 knots as of the most recent mesoanalysis from SPC where the storms are located. Damaging winds is the main concern with the strongest storms, but some small hail is possible as well. The next round of convection will move in late this evening into the overnight hours. A slight risk for severe weather is in place for the northwestern part of our CWA from the SPC. Along with the severe risk, we are also concerned for some flooding. There is a flood watch out until 15z this morning. PWATs are around 2-2.2 inches. We have been quite saturated as of late. Some areas cannot take much more without becoming inundated. Along and north of I-74, the FFG is much lower (6 hr: 2-2.5 inches, 3 hr: 1-2.5 inches) than in the southern half of the CWA, since they have received much of the rain in the last day or so. The area around I-74 to Danville has gotten ~2-5 inches of rain in the last 24 hours based off of MRMS estimates. WPC has put our northwestern counties in a moderate risk ERO today. Temperatures remain hot as we make our way into the weekend. There is a heat advisory for Scott County to Clark County (and south) that is valid through Sunday. Further expansion north of the advisory is possible as we go forward in time and get a better grasp of how the next few rounds of MCS activity will evolve, both spatially and temporally. Heat indices of 100-110 degrees are forecast through Sunday, but how far north these heat indices get will depend solely on the convection. There is a marginal risk for severe weather again tomorrow area-wide and again on Sunday for areas south of a Schuyler to McLean County line with a similar environment in place as previous days. The forecast will continue to evolve as we get newer runs of the models. Next week may bring us a break in the active weather and the heat briefly. Some guidance suggests a high pressure area setting up over the Upper Mississippi Valley / Great Lakes region by Monday, behind a cold front that is set to move through central IL during the day. Temperatures starting Monday into much of the next week will be mainly in the upper 70s to 80s for highs and 60s to low 70s for lows. && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 100 AM CDT Fri Aug 14 2026 IFR ceilings are in place at KPIA-KBMI and are expected to remain through mid-late morning, then MVFR through much of the afternoon. The low ceilings are not forecast to make much progress south, with MVFR likely at KCMI later tonight into Friday afternoon, and a period of MVFR ceilings possible at KSPI-KDEC Friday morning. Periods of TSRA with locally heavy rain and gusty winds will affect the terminals into Friday morning, with bouts if IFR-LIFR under the more intense storms. TSRA should diminish later morning into afternoon. && .ILX WATCHES/WARNINGS/ADVISORIES... Flood Watch until 10 AM CDT this morning for ILZ027>031-037- 038-045-046. Heat Advisory until 8 PM CDT Sunday for ILZ049>052-061>063- 066>068-071>073. && KEY MESSAGES...Copple DISCUSSION...Copple AVIATION...25
Hazardous weather outlook, Aug 13, 3:04 PM CDT, 13 hours 3 minutes before
Hazardous Weather Outlook National Weather Service Lincoln IL 304 PM CDT Thu Aug 13 2026 ILZ027>031-036>038-040>057-061>063-066>068-071>073-142015- 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- 304 PM CDT Thu Aug 13 2026 This Hazardous Weather Outlook is for central Illinois, east central Illinois, southeast Illinois and west central Illinois. .DAY ONE...Tonight. Heat indices of 95 to 110 are expected this afternoon south of I-72. Additional thunderstorms are expected late tonight into Friday morning with damaging winds and large hail possible with any stronger storms. Heavy rain could locally exceed 3 inches and produce localized flooding. Areas for strong to severe storms and flooding will be most likely near and north of I-74 .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hot and humid conditions will expand northward through late week. Peak afternoon heat indices will range from 100 to 110 Friday and Saturday, and Sunday from I-72 southward. Daily chances for thunderstorms exist through the weekend, although these will be mainly north of I-72 Friday afternoon through Sunday morning. Some of these storms could be severe and produce heavy rain through at least Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late tonight. Expected storm motion is toward the east around 30 mph. 37
In the hours before
Local storm report, Aug 14, 3:25 AM CDT, 42 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
325 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0322 AM Flash Flood 2 NNE Danville 40.16N 87.61W
08/14/2026 Vermilion IL Law Enforcement
Road impassable due to flood waters.
&&
RACLocal storm report, Aug 14, 3:26 AM CDT, 41 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
326 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0322 AM Flash Flood 1 N Danville 40.16N 87.63W
08/14/2026 Vermilion IL Law Enforcement
Road impassable due to flood waters.
&&
RACLocal storm report, Aug 14, 3:38 AM CDT, 29 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
338 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0328 AM Flash Flood 2 NNE Danville 40.16N 87.62W
08/14/2026 Vermilion IL Emergency Mngr
Cars under water and water entering houses
Blue Ridge and Westview area in Danville
with water rescues ongoing.
&&
RACLocal storm report, Aug 14, 3:39 AM CDT, 28 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
339 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0252 AM Tstm Wnd Dmg 2 E Urbana 40.11N 88.16W
08/14/2026 Champaign IL Broadcast Media
6 inch tree branch down on Washington
Street. Time estimated via radar.
&&
RACLocal storm report, Aug 14, 4:01 AM CDT, 6 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
401 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1259 AM Tstm Wnd Dmg 1 E Danville 40.14N 87.61W
08/14/2026 Vermilion IL Law Enforcement
Roof off of business blown off and in
roadway. Time estimated by radar.
&&
RACLocal storm report, Aug 14, 4:02 AM CDT, 5 minutes before
Preliminary Local Storm Report
National Weather Service Lincoln IL
402 AM CDT Fri Aug 14 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0356 AM Rain 2 N Homer 40.06N 87.96W
08/14/2026 M1.23 Inch Champaign IL Cocorahs
1.23 rain in the past 60 minutes.
&&
RACThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 11:11 PM CDT | Special Weather Statement | ILX | Peoria | 34 min |
| Aug 13, 11:21 PM CDT | Flash Flood Warning | ILX | Knox, Marshall, Peoria, Stark, Woodford | 4 hr |
| Aug 13, 11:32 PM CDT | Special Weather Statement | ILX | Woodford | 43 min |
| Aug 13, 11:56 PM CDT | Special Weather Statement | ILX | Peoria | 34 min |
| Aug 14, 12:05 AM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 55 min |
| Aug 14, 12:18 AM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell, Woodford | 57 min |
| Aug 14, 12:40 AM CDT | Flash Flood Warning | ILX | Vermilion | 12 hr |
| Aug 14, 1:07 AM CDT | Special Weather Statement | ILX | Vermilion | 23 min |
| Aug 14, 1:12 AM CDT | Severe Thunderstorm Warning | ILX | McLean | 52 min |
| Aug 14, 1:38 AM CDT | Flash Flood Warning | ILX | Champaign, McLean | 7 hr |
| Aug 14, 2:33 AM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt, Vermilion | 46 min |
| Aug 14, 2:59 AM CDT | Flash Flood Warning | ILX | Champaign, Vermilion | 6 hr |
| Aug 14, 5:47 AM CDT | Flash Flood Warning | ILX | DeWitt, Piatt | 3 hr |
| Aug 14, 6:47 AM CDT | Flash Flood Warning | ILX | Coles, Douglas, Edgar | 11 hr |
| Aug 14, 8:14 AM CDT | Flash Flood Warning | ILX | Clark, Coles, Cumberland, Edgar | 3 hr |
| Aug 14, 9:25 AM CDT | River Flood Warning | ILX | Vermilion | 4 days |
| Aug 14, 10:00 AM CDT | Flash Flood Warning | ILX | Cass, Fulton, Logan, Mason, Menard, Sangamon | 4 hr |
| Aug 14, 10:20 AM CDT | River Flood Warning | ILX | Fulton, Knox | 4 days |
| Aug 14, 10:32 AM CDT | Areal Flood Advisory | ILX | Macon | 3 hr |
| Aug 14, 12:15 PM CDT | Flood Watch | ILX | Champaign, DeWitt, Douglas, Edgar, Fulton, Knox and 10 more | 22 hr |
| Aug 14, 3:09 PM CDT | River Flood Warning | ILX | Fulton | 5 days |
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.