A cluster of thunderstorms developed over northern Illinois during the pre-dawn hours of June 6th, then dropped southeastward into central Indiana as the morning progressed. The storms skirted through Vermilion County with gusty winds and rain, but no reports of severe weather or flooding.
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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.
A cluster of thunderstorms developed over northern Illinois during the pre-dawn hours of June 6th, then dropped southeastward into central Indiana as the morning progressed. The storms skirted through Vermilion County with gusty winds and rain, but no reports of severe weather or flooding. By late afternoon, thunderstorms began re-developing along the residual outflow boundary...with cells continuously back-building over portions of Vermilion County into the evening. Very heavy rainfall occurred in a small portion of the county from Bismarck to the northern edge of Danville. The Danville Airport (KDNV) measured 6.41, while an observer 1 mile west-northwest of the airport received 7.50. The heavy rain falling on already wet soils led to flash flooding during the evening, with residual flooding lingering into the morning of June 7th. Water rescues had to be performed near Stoney Creek on the southeast side of Danville as the creek overflowed its banks and flooded a few homes.
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 6, 5:51 PM CST, 2 hours 59 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Lincoln IL 651 PM CDT Sat Jun 6 2026 .KEY MESSAGES... - Scattered thunderstorms are possible through this evening north of Interstate 72. A few storms could become strong, posing a risk for heavy rain and damaging winds. - An upper system slowly lifting through the Midwest states will bring widely scattered showers and storms Sunday through Monday. There is a 40 to 60% chance for total rainfall to exceed 1 inch. - A stronger warming trend arrives Tuesday through the end of the week, pushing heat index values near 100 degrees. && .DISCUSSION... Issued at 154 PM CDT Sat Jun 6 2026 Water vapor imagery early this afternoon shows a 500 mb shortwave ridge approaching from the southwest with a closed low spinning over the southern Plains. Surface analysis has a cold front draped over northern Illinois with steady west-southwest winds in place south of there across central Illinois. Temperatures as of 1 pm have climbed into the middle to upper 80s with dewpoints in the upper 60s to low 70s, and feel-like temperatures in the low 90s. A couple lingering outflow boundaries from overnight storms are evident over northern and central parts of the state and will be the focus for thunderstorm development north of I-72 through this evening. SPC mesoanalysis shows strong instability (2-3k J/kg) and very steep low-level lapse rates (7-8 C/km) in place. Weak wind shear and lack of large-scale ascent should limit overall storm organization, but collapsing updrafts could generate locally gusty winds that may come close to severe limits. Climatologically high PWATs, deep warm cloud depths, and somewhat slow storm motions could also support locally heavy rainfall especially if storms repeat over the same areas. The 12Z HREF 24 hour LPMM shows isolated pockets of QPF exceeding 2 inches near the I-74 corridor through this evening. Upper ridging gets pushed east of here by Sunday as the previously mentioned closed upper low becomes an open trough and lifts into the Midwest states. The surface cold front will approach our northern counties by Sunday morning, becoming stationary before lifting north of here Monday. Several shortwave impulses embedded within the main trough will promote widely scattered showers and storms Sunday through Monday. Although the threat for severe weather appears low, beneficial heavy rain appears increasingly likely with high PWATs in place. There is currently a 40-60% chance of exceeding 1 inch of rainfall across the entire area with lower chances for exceeding 2 inches. WPC has a slight risk of excessive rainfall in parts of the area both Sunday and Monday for the outside chance of localized flooding. Mid-level heights rise heading into midweek as upper ridging builds over the east-central US, bringing a stretch of hot and humid conditions. Air temperatures look to climb into the upper 80s to low 90s Tuesday through the end of the week, with heat indices approaching 100 degrees. The LREF (ENS, GEFS, GEPS) shows a 20% chance for heat indices to exceed 100 degrees during this period. Long range guidance depicts an upper trough breaking down the ridge and sending a cold front through the area late in the week or early next weekend, though timing remains highly uncertain. If this moves through sooner than later, a shorter period of prolonged heat would be favored due to increasing precipitation chances with the frontal passage. && .AVIATION /00Z TAFS THROUGH 00Z MONDAY/... Issued at 649 PM CDT Sat Jun 6 2026 A boundary north of the I-74 terminals has served as a focus for thunderstorms this evening, with those airfields potentially (30-40% chance) being impacted by storms after around 02z. Additional waves of scattered showers and storms will lift north across the region Sunday, potentially producing brief visibility reductions from heavy rain and locally gusty winds. PROB30 groups were used to highlight the time periods of highest chances (30-60%), though these will likely need adjusting as model guidance hopefully comes into better agreement. && .ILX WATCHES/WARNINGS/ADVISORIES... None. && KEY MESSAGES...NMA DISCUSSION...NMA AVIATION...Bumgardner
Hazardous Weather Outlook National Weather Service Lincoln IL 210 PM CDT Sat Jun 6 2026 ILZ027>031-036>038-040>051-053-071915- Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler- Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott- Morgan-Sangamon-Macon- 210 PM CDT Sat Jun 6 2026 This Hazardous Weather Outlook is for central Illinois, east central Illinois and west central Illinois. .DAY ONE...Tonight. Additional thunderstorms are expected to develop this afternoon, and linger into the evening. The highest storm chances tonight will be near and north of I-72. While the severe weather threat is not high, a few of the storms may be locally severe, with damaging winds as the main concern. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Additional thunderstorms are likely Sunday through Monday night, lingering into Tuesday over east central Illinois. Although the severe weather threat is low, the numerous storms may result in localized flash flooding. Hot and humid conditions will intensify through the upcoming week. Heat index values over 100 degrees are possible as early as Tuesday west of I-55, and will be widespread Wednesday and Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ052-054>057-061-071915- Christian-Moultrie-Douglas-Coles-Edgar-Shelby- 210 PM CDT Sat Jun 6 2026 This Hazardous Weather Outlook is for central Illinois and east central Illinois. .DAY ONE...Tonight. Isolated thunderstorms are expected north of I-70 into tonight. The severe weather threat is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Additional thunderstorms are likely Sunday through Tuesday. Although the severe weather threat is low, the numerous storms may result in localized flash flooding. Hot and humid conditions will intensify through the upcoming week. Heat index values over 100 degrees will be widespread Wednesday and Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. ILZ062-063-066>068-071>073-071915- Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence- 210 PM CDT Sat Jun 6 2026 This Hazardous Weather Outlook is for east central Illinois and southeast Illinois. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Additional thunderstorms are likely Sunday through Tuesday. Although the severe weather threat is low, the numerous storms may result in localized flash flooding. Hot and humid conditions will intensify through the upcoming week. Heat index values over 100 degrees will be widespread Wednesday and Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. Copple
Preliminary Local Storm Report
National Weather Service Lincoln IL
945 PM CDT Sat Jun 6 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0935 PM Rain Vermilion Regional Airp 40.20N 87.60W
06/06/2026 M5.57 Inch Vermilion IL AWOS
&&The Lincoln radar (KILX), 135 km away, was scanning. The volume nearest the first event began at 02:51 UTC.
2 flood, 1 flash flood. Local standard time, as filed.
Water was flowing across several county roads near the Vermilion Regional Airport (KDNV), along North Bowman Avenue between Danville and Bismarck, and in the town of Bismarck. One vehicle was stranded in high water.
Stoney Creek overflowed its banks and flooded a few houses along South Collett Street, prompting calls for water rescues. Numerous roads in the area were blocked by stuck vehicles.
Junction Street was closed due to flood waters...with an SUV stuck with water up to the headlights.
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: 1341218, 1341221, 1341223.