Several rounds of showers and thunderstorms produced heavy rain across parts of central Illinois from the evening of June 10th into the pre-dawn hours of June 11th. 50.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS ILX wrote it up.
Several rounds of showers and thunderstorms produced heavy rain across parts of central Illinois from the evening of June 10th into the pre-dawn hours of June 11th. Rainfall amounts of 2 to 3 inches were common, with some locations exceeding 3.50. Excessive rainfall rates associated with strong to severe thunderstorms during the evening of June 10th resulted in scattered instances of flash flooding across Knox, Peoria, Tazewell, McLean, and Sangamon counties. In addition, sharp rises on area creeks and streams led to overland flooding in a few spots...most notably on the north side of Lexington in McLean County. The flood waters gradually receded after sunrise on June 11th.
The local office's own words before the first event, 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 the first event at Jun 10, 5:34 PM CST, 1 hour 27 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Lincoln IL 634 PM CDT Wed Jun 10 2026 .KEY MESSAGES... - Widespread heat continues through Thursday, though increasing cloud cover keeps the chance of heat index values exceeding 100 degrees at around 20 percent south of Interstate 72. - Thunderstorms will push across central Illinois this evening...bringing a risk for damaging wind gusts and localized flash flooding. - A cold front brings another round of severe storms Thursday evening and overnight, where damaging straight-line winds remain the main concern. && .DISCUSSION... Issued at 1246 PM CDT Wed Jun 10 2026 Short Term Forecast: Heat and Severe Potential Today and tomorrow will feature widespread temperatures in the 90s, with heat indices climbing into the upper 90s to lower 100s. Confidence in meeting Heat Advisory criteria (max heat index near 105F) remains low; LREF probabilities for heat indices exceeding 100F generally hold around 20 percent for areas south of I-72. Primary limiting factors for higher heat readings will be increasing cloud cover and precip chances along with convective debris, particularly on Thursday for the latter. Thunderstorms are ongoing early this afternoon across portions of eastern Iowa and northeastern Missouri, with additional development expected to our west later this evening. Out ahead of the initial convective line, temperatures pushing 90 degrees and dew points in the low to mid-70s are supporting roughly 1500-2000 J/kg of weakly capped MLCAPE across central Illinois. Instability will further increase through mid-afternoon, peaking near 2500 J/kg. Effective bulk shear values will increase to around 30kt with the arrival of storms, sufficient to support an organized severe threat. This initial line of storms is expected to lift northeast, likely staying near or just north of the I-72 corridor. While low-level flow is currently veered with unimpressive SRH values, this is forecast to increase ahead of the second line of storms. DCAPE values around 900-1200 J/kg, coupled with increasingly steep low-level lapse rates, will support a wind threat with the first wave of convection. Round two will see strengthened kinematic fields as storms congeal into a line and spread ESE across central Illinois late this evening. Damaging winds will remain the primary threat, though interactions with remnant outflow boundaries and increasing low-level winds associated with a strengthening low-level jet will support a localized tornado threat this evening. This threat will slowly subside with waning diurnal instability as the system moves east overnight. In addition to the severe potential, multiple rounds of storms-- including the possibility for backbuilding and training--pose a localized flooding threat. Corfidi vectors ahead of the second line of storms drop below 10 kt and become oriented out of the northeast, suggesting potential for backbuilding along the southern periphery of the QLCS. While the severe threat should diminish overnight, the hydro threat may linger well into or through the overnight hours. Thursday and Extended Period A robust shortwave trough is expected to lift into the Upper Midwest on Thursday, driving a cold front through central Illinois Thursday evening and overnight. Ahead of this boundary, the GFS suggests a broad, unstable warm sector with MLCAPE values exceeding 3000 J/kg. Coupled with deep-layer shear of 25-35 kt and 0-1km shear of 15-25 kt, the kinematic environment remains seasonably strong Thursday. While pre-frontal discrete activity with all severe hazards is possible, the primary concern remains straight-line winds as convective elements congeal into a line along and ahead of the front. Lingering showers and storms over southeast Illinois on Friday morning will exit quickly, giving way to clearing skies as high pressure builds into the region. This will provide a brief return to more seasonal conditions, with highs in the lower to mid-80s and dew points mixing down into the upper 50s, resulting in a much more comfortable air mass. For the weekend and into early next week, the pattern turns more zonal aloft while a low-level baroclinic zone wobbles over the region. This setup maintains additional chances for showers and thunderstorms, though specifics regarding timing and coverage remain uncertain at this forecast range. && .AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Issued at 634 PM CDT Wed Jun 10 2026 The airmass across central Illinois has temporarily stabilized early this evening: however, as the nocturnal low-level jet strengthens after sunset, another round of convection will develop. 2315z/615pm regional radar mosaic shows clusters of thunderstorms from near KMLI westward to KMCI. These storms will rapidly spread/develop eastward and will impact the central Illinois terminals later this evening. Based on radar timing tools and the latest HRRR/RAP, have carried a TEMPO group for thunder and wind gusts to 50kt at KPIA between 02z and 04z, then further southeast to the I-72 TAF sites between 03z and 06z. Once the line of storms drops further south, showers will linger for a couple of hours before dry weather returns across the board overnight through much of Thursday. The latest guidance suggests a line of thunderstorms will develop along an advancing cold front late Thursday, but will remain west of the terminals until after 00z Fri. && .ILX WATCHES/WARNINGS/ADVISORIES... Flood Watch through Thursday morning for ILZ027>031-036>038- 040>043-047>051. && KEY MESSAGES...Deubelbeiss DISCUSSION...Barnes AVIATION...Deubelbeiss
Hazardous Weather Outlook National Weather Service Lincoln IL 210 PM CDT Wed Jun 10 2026 ILZ027>031-036>038-040-041-111915- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler- Mason- 210 PM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for central Illinois and west central Illinois. .DAY ONE...Tonight. A couple waves of severe thunderstorms are possible (30-45% chance) this afternoon into tonight. The primary threat will be damaging winds in excess of 70 mph, though large hail and a tornado or two are also possible. Areas of flash flooding are also a concern. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The heat index will again reach 100 degrees on Thursday. Another round of severe thunderstorms is expected Thursday evening. The primary risk remains with damaging winds over 70 mph, but large hail and tornadoes are also possible. Flash flooding is also a concern, especially wherever heavy rain falls today. Additional thunderstorms are expected Saturday night. The severe weather risk is uncertain at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed this afternoon and evening. Expected storm motion is toward the northeast around 35 mph. ILZ042>057-061-111915- Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-Morgan- Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby- 210 PM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for central Illinois, east central Illinois and west central Illinois. .DAY ONE...Tonight. Strong to severe thunderstorms are expected to move across the area this evening. The primary risk is damaging winds in excess of 60 mph, although large hail and a tornado or two are also possible. There is also a risk for flash flooding. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The heat index will again reach 100 degrees on Thursday. Another round of severe thunderstorms is expected Thursday evening. The primary risk is with damaging winds over 70 mph, though large hail and a few tornadoes are also possible. Flash flooding is also a concern, especially where heavy rain falls today. Additional thunderstorms are expected Saturday night. The severe weather risk is uncertain at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. Expected storm motion is toward the northeast around 35 mph. ILZ062-063-066>068-071>073-111915- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- 210 PM CDT Wed Jun 10 2026 This Hazardous Weather Outlook is for east central Illinois and southeast Illinois. .DAY ONE...Tonight. A decaying line of thunderstorms will move into the area after 9 pm. While the severe weather risk will be decreasing, isolated damaging wind gusts remain a concern. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. A line of severe thunderstorms is expected Thursday evening, lingering after midnight. The primary risk is with damaging winds over 60 mph, though large hail and a tornado or two are also possible. Additional thunderstorms are expected Saturday night. The severe weather risk is uncertain at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. Deubelbeiss
Preliminary Local Storm Report
National Weather Service Lincoln IL
350 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0233 PM Tstm Wnd Dmg Pekin 40.57N 89.64W
06/10/2026 Tazewell IL Public
12 inch tree limb down.
&&
RKPreliminary Local Storm Report
National Weather Service Lincoln IL
400 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0253 PM Tstm Wnd Dmg 1 S Tremont 40.52N 89.49W
06/10/2026 Tazewell IL Public
8 to 10 inch tree limbs down. Time estimated
by radar.
&&
RKPreliminary Local Storm Report
National Weather Service Lincoln IL
406 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0329 PM Tstm Wnd Dmg Lexington 40.64N 88.78W
06/10/2026 McLean IL Public
Trees and power lines down.
&&
RKPreliminary Local Storm Report
National Weather Service Lincoln IL
426 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0404 PM Tstm Wnd Dmg Clinton 40.16N 88.96W
06/10/2026 De Witt IL Public
Tree downed onto a power line in Clinton.
Relayed by EM.
&&
RKPreliminary Local Storm Report
National Weather Service Lincoln IL
431 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0233 PM Tstm Wnd Dmg Pekin 40.56N 89.64W
06/10/2026 Tazewell IL Public
Large tree downed in Pekin. Photos relayed
by EM.
&&
RKPreliminary Local Storm Report
National Weather Service Lincoln IL
630 PM CDT Wed Jun 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0216 PM Tstm Wnd Dmg 3 SSE Alta 40.78N 89.61W
06/10/2026 Peoria IL Broadcast Media
Large tree branch down. Time estimated by
radar.
&&
RKThe Quad Cities radar (KDVN), 69 km away, was scanning. The volume nearest the first event began at 01:03 UTC.
5 flash flood, 3 flood. Local standard time, as filed.
Water was flowing across parts of Carl Sandburg Drive in Galesburg with one car stalled in the flood waters.
Six inches of water was flowing across the entrance road to the Tazewell County EMA on IL-9 in Tremont. There was also 6 to 7 inches of water flowing across IL-9 in front of Casey's.
Significant roadway flooding occurred near Four Seasons Road in Bloomington, with around 2 to 3 feet of standing water.
Water was standing on North Parkside Road near Normal Community West High School.
About 2 feet of water flooded an underpass on Dirksen Parkway with several surrounding streets also filling with water.
A photo showed overland flooding of a stream near Orange Street on the north side of Lexington. Water extended up to some homes and outbuildings.
A vehicle stalled in waist-deep water on a roadway.
Minor flooding occurred on the west side of Eureka along Walnut Creek near the golf course and on the east side of town near Crosspoint Community Church.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2026Every state in 2026This day in weather historyWarnings in Illinois, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1341139, 1341141, 1341144, 1341150, 1341146, 1341154, 1341148, 1341152.