Two storm complexes impacted central and southeast Illinois during the afternoon hours of the 18th into the early morning hours of the 19th. The storms produced scattered damaging wind gusts of 60 to 70 mph, widespread heavy rainfall in central Illinois and flash flooding in Knox County.
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.
Two storm complexes impacted central and southeast Illinois during the afternoon hours of the 18th into the early morning hours of the 19th. The storms produced scattered damaging wind gusts of 60 to 70 mph, widespread heavy rainfall in central Illinois and flash flooding in Knox County.
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 18, 11:17 AM CST, 2 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 1217 PM CDT FRI JUN 18 2010 .DISCUSSION... ISSUED 1211 PM CDT FRI JUN 18 2010 A HEAT ADVISORY WAS ISSUED FOR THE SOUTHEAST CWA FOR THIS AFTERNOON AND EARLY EVENING. ALREADY SEEING HEAT INDEX VALUES OF 100 TO 105 DEGREES...WITH DEWPOINTS IN THAT AREA CURRENTLY IN THE MID 70S. WILL NEED TO MONITOR AREAS FURTHER NORTHWEST TOWARD SPRINGFIELD AND JACKSONVILLE FOR POSSIBLE EXPANSION...BUT AIR TEMPERATURES ARE A BIT LOWER AT THE MOMENT HELPING TO KEEP THE NUMBERS DOWN FOR THE TIME BEING. GEELHART && .AVIATION... ISSUED 1215 PM CDT FRI JUN 18 2010 SQUALL LINE PUSHING ACROSS EASTERN IOWA AT THE MOMENT...AND IS PROJECTED TO AFFECT THE KPIA AND KBMI TAF SITES THIS AFTERNOON. AWIPS TIME-OF-ARRIVAL TOOL WOULD HAVE THE LINE COMING INTO KPIA AROUND 2030Z AND BMI SHORTLY AFTER 2130Z. WILL HAVE TEMPO GROUPS FOR THESE TWO SITES TO TIME THE ARRIVAL...AND KEEP VCTS AT THE REMAINING SITES. LITTLE CHANGE MADE BEYOND 00Z. GEELHART && .ILX WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR ILZ062-063-066>068- 071>073. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 1144 AM CDT FRI JUN 18 2010 ILZ027>031-037-038-191100- KNOX-MARSHALL-MCLEAN-PEORIA-STARK-TAZEWELL-WOODFORD- 1144 AM CDT FRI JUN 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...AS A SQUALL LINE ACROSS IOWA MOVES INTO ILLINOIS. SIGNIFICANT WIND DAMAGE IS POSSIBLE FROM THIS LINE OF STORMS...WITH LARGE HAIL ALSO POSSIBLE. AFTERNOON HEAT INDEX VALUES OF 95 TO 100 DEGREES WILL BE POSSIBLE THIS AFTERNOON...BEFORE THE STORMS ARRIVE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A WEAK COLD FRONT IS EXPECTED TO REMAIN OVER THE AREA THE NEXT SEVERAL DAYS. THERE WILL BE A SLIGHT CHANCE FOR THUNDERSTORMS ALONG THIS BOUNDARY OVER THE NEXT SEVERAL DAYS...WITH THE BETTER CHANCE FOR MORE ORGANIZED THUNDERSTORMS COMING ALONG EITHER LATE SATURDAY NIGHT OR SUNDAY. ONCE AGAIN...THE STRONGER STORMS MAY PRODUCE GUSTY WINDS AND VERY HEAVY RAINFALL. SEVERE WEATHER IS NOT EXPECTED ON SATURDAY...BUT IS POSSIBLE ON SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND EARLY EVENING... PRIMARILY BETWEEN 2 PM AND 7 PM. ILZ036-040-041-047-049-050-191100- CASS-FULTON-MASON-MORGAN-SCHUYLER-SCOTT- 1144 AM CDT FRI JUN 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...AS A SQUALL LINE ACROSS IOWA MOVES INTO ILLINOIS. WIND DAMAGE IS POSSIBLE FROM THIS LINE OF STORMS...WITH LARGE HAIL ALSO POSSIBLE. THE BEST SEVERE WEATHER CHANCES WILL BE A BIT FURTHER NORTH. AFTERNOON HEAT INDEX VALUES OF 95 TO 100 DEGREES WILL BE POSSIBLE THIS AFTERNOON. FOR INTERESTS ALONG THE ILLINOIS RIVER...FLOODING WILL CONTINUE ALONG THE ILLINOIS RIVER DOWNSTREAM FROM HAVANA FOR THE NEXT SEVERAL DAYS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A WEAK COLD FRONT IS EXPECTED TO REMAIN OVER THE AREA THE NEXT SEVERAL DAYS. THERE WILL BE A SLIGHT CHANCE FOR THUNDERSTORMS ALONG THIS BOUNDARY OVER THE NEXT SEVERAL DAYS...WITH THE BETTER CHANCE FOR MORE ORGANIZED THUNDERSTORMS COMING ALONG EITHER LATE SATURDAY NIGHT OR SUNDAY. ONCE AGAIN...THE STRONGER STORMS MAY PRODUCE GUSTY WINDS AND VERY HEAVY RAINFALL. SEVERE WEATHER IS NOT EXPECTED ON SATURDAY...BUT IS POSSIBLE SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. PRESENT INDICATIONS SUGGEST THE PRIMARY TIME FRAME FOR ACTIVATION WILL BE FROM 3 PM THROUGH 9 PM THIS EVENING. ILZ042-043-048-051>053-061-191100- CHRISTIAN-DE WITT-LOGAN-MACON-MENARD-SANGAMON-SHELBY- 1144 AM CDT FRI JUN 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...AS A FRONTAL BOUNDARY BECOMES STATIONARY OVER NORTHERN ILLINOIS. WIND DAMAGE AND LARGE HAIL WILL BE THE PRIMARY THREATS...AS WELL AS VERY HEAVY RAIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE WEAK COLD FRONT IS EXPECTED TO REMAIN OVER THE AREA THE NEXT SEVERAL DAYS. THERE WILL BE A SLIGHT CHANCE FOR THUNDERSTORMS ALONG THIS BOUNDARY THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK...WITH THE BETTER CHANCE FOR MORE ORGANIZED THUNDERSTORMS COMING ALONG EITHER LATE SATURDAY NIGHT OR SUNDAY. ONCE AGAIN...THE STRONGER STORMS MAY PRODUCE GUSTY WINDS AND VERY HEAVY RAINFALL. SEVERE WEATHER IS NOT EXPECTED ON SATURDAY...BUT IS POSSIBLE SUNDAY. AFTERNOON HEAT INDEX VALUES AROUND 100 DEGREES ARE LIKELY THIS AFTERNOON...THEN AGAIN ON TUESDAY AND WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING. PRESENT INDICATIONS SUGGEST THE PRIMARY TIME FRAME FOR ACTIVATION WILL BE FROM 3 PM THROUGH 9 PM THIS EVENING. ILZ044>046-054>057-191100- CHAMPAIGN-COLES-DOUGLAS-EDGAR-MOULTRIE-PIATT-VERMILION- 1144 AM CDT FRI JUN 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...AS A FRONTAL BOUNDARY BECOMES STATIONARY OVER NORTHERN ILLINOIS. WIND DAMAGE AND LARGE HAIL WILL BE THE PRIMARY THREATS...AS WELL AS VERY HEAVY RAIN. FOR INTERESTS ALONG THE SANGAMON RIVER...ESPECIALLY NEAR MONTICELLO...MINOR FLOODING WILL BE POSSIBLE THE NEXT SEVERAL DAYS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE WEAK FRONTAL BOUNDARY IS EXPECTED TO REMAIN OVER THE AREA THE NEXT SEVERAL DAYS. ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE...AS LONG AS THE FRONT REMAINS IN THE AREA. SOME OF THE STRONGER STORMS MAY PRODUCE STRONG WINDS AND VERY HEAVY RAINFALL. THE THREAT OF SEVERE WEATHER BEYOND SATURDAY IS UNCERTAIN AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS AFTERNOON AND THIS EVENING. PRESENT INDICATIONS SUGGEST THE PRIMARY TIME FRAME FOR ACTIVATION WILL BE FROM 4 PM UNTIL 10 PM. ILZ062-063-066>068-071>073-191100- CLARK-CLAY-CRAWFORD-CUMBERLAND-EFFINGHAM-JASPER-LAWRENCE-RICHLAND- 1144 AM CDT FRI JUN 18 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE LATE THIS AFTERNOON AND EVENING. A FEW OF THE STORMS WILL BE CAPABLE OF PRODUCING GUSTY WINDS AND HEAVY RAINFALL. ANY RISK OF SEVERE WEATHER IS MOST LIKELY TO BE NORTH OF I-70. EXTENSIVE FLOODING IS EXPECTED ALONG MUCH OF THE WABASH RIVER THE NEXT SEVERAL DAYS. MINOR FLOODING ALONG PORTIONS OF THE LITTLE WABASH AND EMBARRAS RIVERS WILL CONTINUE INTO THE FIRST PART OF THE WEEKEND. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A WEAK FRONTAL BOUNDARY IS EXPECTED TO REMAIN OVER ILLINOIS THE NEXT SEVERAL DAYS. ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE...AS LONG AS THE FRONT REMAINS IN THE AREA. SOME OF THE STRONGER STORMS MAY PRODUCE STRONG WINDS AND VERY HEAVY RAINFALL. THE THREAT OF SEVERE WEATHER BEYOND SATURDAY IS UNCERTAIN AT THIS TIME. AFTERNOON HEAT INDEX VALUES FROM 95 TO 100 DEGREES ARE LIKELY THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. GEELHART
The Quad Cities radar (KDVN), 75 km away, was scanning. The volume nearest the first event began at 19:23 UTC.
11 thunderstorm wind, 2 hail, 1 flash flood. Local standard time, as filed.
One tree and numerous tree limbs were blown down from Galesburg to Dahinda. Several power lines were downed as well.
Numerous tree limbs were blown down and corn was flattened near Hoopston.
Numerous trees, tree limbs, and power lines were blown down in and around Altona, Galesburg, and Abingdon.
Numerous tree limbs were blown down.
A few small trees were snapped off by thunderstorm winds.
Numerous tree limbs were blown down between Trivoli and Peoria.
Numerous tree limbs were blown down.
A large tree was blown down onto a house.
A large tree was blown onto a house.
Several rounds of heavy rain in northwest and southern Knox County produced areas of flash flooding. Numerous city streets were flooded in Galesburg and Knoxville. Rainfall totals in the flash flood area ranged from 2.75 to nearly 4.00.
One tree and numerous tree limbs were blown down in and around Beardstown.
A two foot diameter tree was uprooted.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2010Every state in 2010This day in weather historyWarnings in Illinois, June 2010
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: 240355, 241902, 240356, 240363, 240359, 240367, 240362, 240375, 240365, 240369, 246495, 240371, 241903, 240374.