Low pressure tracking from northern Missouri toward the Great Lakes triggered scattered thunderstorms across central Illinois during the afternoon and evening of June 12th. to Danville line.
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.
Low pressure tracking from northern Missouri toward the Great Lakes triggered scattered thunderstorms across central Illinois during the afternoon and evening of June 12th. A few of the storms became severe...producing heavy rain, minor wind damage, and hail as large as quarters along a Jacksonville...to Decatur...to Danville line.
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 12, 1:36 PM CST, 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 236 PM CDT FRI JUN 12 2015 .SHORT TERM...(TONIGHT) ISSUED AT 236 PM CDT FRI JUN 12 2015 DESPITE SHORTWAVE RIDGING IN PLACE OVER ILLINOIS. STRONG INSTABILITY OF 1500-3000 J/KG IS OVERCOMING ANY SUBSIDENCE TO PRODUCE SCATTERED STORMS OVER THE AREA THIS AFTERNOON. COVERAGE WILL LIKELY INCREASE FURTHER ONCE THE RIDGE AXIS MOVES EAST OF THE AREA LATE THIS AFTERNOON. PRECIPITABLE WATER LEVELS WERE NEAR THE DAILY RECORD THIS MORNING AND ARE INDICATIVE OF HIGHLY EFFICIENT STORMS. GIVEN THE HEAVY RAINFALL OVER THE PAST SEVERAL DAYS FROM U.S. 136 NORTHWARD AM CONCERNED THAT LOCALIZED AREAS WILL ONCE AGAIN HAVE SOME FLOODING ISSUES THIS EVENING. FORTUNATELY THE BULK OF HIGHEST INTENSITY RAINFALL TODAY AND TONIGHT WILL BE SOUTH OF AREAS IMPACTED FROM THE PAST RAINFALL BUT SOME LOCATIONS FROM CANTON TO PEORIA TO BLOOMINGTON WILL HAVE TO BE WATCHED CLOSELY AS THE STORMS EVOLVE. THE HIGH MOISTURE CONTENT OF THE ATMOSPHERIC COLUMN ALSO PRIMES THE STRONGER STORMS TO PRODUCE DOWNBURSTS DURING THE COLLAPSE PHASE. HAVE ALREADY HAD RADAR INDICATED WINDS OF AROUND 30 KTS FROM WEAKENING CELL IN WESTERN MCLEAN COUNTY THIS AFTERNOON. MUGGY CONDITIONS WILL PERSIST OVERNIGHT KEEPING LOW TEMPERATURES MOSTLY IN THE MIDDLE 60S TO AROUND 70. && .LONG TERM...(SATURDAY THROUGH FRIDAY) ISSUED AT 236 PM CDT FRI JUN 12 2015 A BREAK IN THE SHOWERS AND STORMS IS POSSIBLE SATURDAY MORNING FOR AREAS NORTH OF I-70, AFTER THE COLD FRONT PUSHES SOUTH NEAR I-70 TONIGHT. HOWEVER, THE BREAK WILL BE SHORT-LIVED AS THE FRONT RETURNS BACK NORTH AND STORM CHANCES INCREASE SATURDAY AFTERNOON. CHANCES WILL INCREASE MORE RAPIDLY IN WEST OF THE ILLINOIS RIVER AS AN MCS PROGRESSES ACROSS MISSOURI AND SOUTHERN IOWA INTO W ILLINOIS. SEVERE CHANCES ARE PROJECTED TO BE ON THE LOW SIDE PER SPC DAY 2 OUTLOOK, WITH LOCALLY HEAVY RAINFALL THE PRIMARY CONCERN. SEVERE CHANCES RAMP UP ON SUNDAY AFTERNOON AND EVENING, WITH A DAY 3 SLIGHT RISK NORTH OF I-72 FOR HAIL AND WIND DAMAGE. THE FRONTAL BOUNDARY WILL LINGER ACROSS CENTRAL IL, AND REMAIN A FOCUS FOR LOW LEVEL MOISTURE CONVERGENCE. PRECIPITABLE WATER VALUES WILL REMAIN BETWEEN 1.5 AND 2", SO VERY HEAVY RAINFALL RATES AND LOCALIZED FLOODING WILL BE POSSIBLE. ANY MORNING SUNSHINE WILL HELP DESTABILIZE THE BOUNDARY LAYER TO REACH CONVECTIVE TEMPS BY MID AFTERNOON. MARGINAL WIND SHEAR OF 25-30KTS MAY STILL BE ENOUGH TO HELP PRODUCE SOME LINEAR STORM SEGMENTS WITH DAMAGING WINDS. MOISTURE LOADING ITSELF WILL HELP PRODUCE POTENTIALLY DAMAGING DOWNBURSTS DURING THE COLLAPSE PHASE OF ANY STORM TOWER. A PERSISTENT SOUTHWEST FLOW ALOFT IS EXPECTED FOR MUCH OF NEXT WEEK. THAT WILL PROVIDE A SOURCE FOR PERIODIC SHORTWAVE INTERACTION WITH THE OSCILLATING FRONTAL BOUNDARY ACROSS ILLINOIS. THERE DOES NOT APPEAR TO BE ANY APPRECIABLE RELIEF FROM THE HIGH DEWPOINT AIRMASS NEXT WEEK, SO WE KEPT HIGH CHANCE AND LIKELY POPS ACROSS CENTRAL AND SOUTHEAST IL THROUGH WEDNESDAY NIGHT. BEYOND THAT, UNCERTAINTIES IN TIMING PROMPTED KEEPING POPS IN THE CHANCE CATEGORY FOR THURSDAY THROUGH FRIDAY. PERIODS OF VERY HEAVY RAINFALL AND FLASH FLOODING WILL REMAIN A PRIMARY CONCERN, AS THE GROUND BECOMES OR REMAINS VERY SATURATED. RIVERS AND STREAMS IN OUR NORTHERN COUNTIES ARE ALREADY HIGH, WITH MORE ISOLATED RIVER FLOODING ACROSS THE SOUTH FOR NOW. THE CLOUDY FORECAST DURING THE EXTENDED HAS PROMPTED KEEPING HIGH TEMPERATURES NEAR SEASONAL NORMALS, BUT ANY PERIODS OF SUNSHINE COULD QUICKLY BOOST TEMPS THROUGH THE 80S, DESPITE FORECAST HIGHS GENERALLY IN THE LOWER 80S NEXT WEEK. SATURDAY STILL LOOKS WARM, WITH MID TO UPPER 80S, BUT EACH DAY WE TRIMMED A FEW DEGREES BASED ON MODEL CONSENSUS. TUESDAY AND WEDNESDAY ARE PROJECTED TO BE THE COOLEST DAYS, WITH NEAR 79 FOR GALESBURG AND 83/84 FOR LAWRENCEVILLE. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SATURDAY AFTERNOON) ISSUED AT 1154 AM CDT FRI JUN 12 2015 SHORTWAVE RIDGING NOW MOVING INTO THE STATE AND HAS LED TO A TEMPORARY DECREASE IN COVERAGE OF CONVECTION. HOWEVER...THE SUBSIDENCE IS BATTLING DEVELOPING SURFACE-BASED INSTABILITY OF 1500-3000 J/KG AND VERY MOIST COLUMN. THIS MORNINGS KILX SOUNDING SHOWED PRECIP WATER NEAR THE HIGHEST SEEN IN MID-JUNE. 12Z MODEL SUITE IS CONSISTENT IN ADVECTING PRECIP WATER OF OVER 2 INCHES TO PORTIONS OF THE AREA TONIGHT. WILL BE INTRODUCING WIDESPREAD CONVECTION BACK INTO MOST OF THE TERMINALS FROM SOUTHWEST TO NORTHEAST LATE THIS AFTERNOON AND OVERNIGHT. WINDS WILL BE VARIABLE NEAR STORMS EVOLVING TO PREVAILING SOUTHERLY BY 12Z SATURDAY MORNING. && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...BARKER LONG TERM...SHIMON AVIATION...BARKER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 319 PM CDT FRI JUN 12 2015 ILZ027>031-036-037-040-041-047>050-130730- CASS-FULTON-KNOX-MARSHALL-MASON-MENARD-MORGAN-PEORIA-SCHUYLER- SCOTT-STARK-TAZEWELL-WOODFORD- 319 PM CDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS...NORTH CENTRAL ILLINOIS AND WEST CENTRAL ILLINOIS. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL REDEVELOP ACROSS THE AREA THIS EVENING. A FEW OF THE STORMS MAY CONTAIN GUSTY WINDS AND SMALL HAIL. THE THREAT FOR ADDITIONAL HEAVY RAINFALL WILL CONTINUE WHICH MAY PRODUCE LOCALIZED FLOODING AND WORSEN AREAS OF RIVER FLOODING IN PROGRESS. FLOODING WILL CONTINUE ALONG THE ILLINOIS AND SPOON RIVERS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY PERIODIC THUNDERSTORM CHANCES WILL CONTINUE SATURDAY THROUGH THURSDAY. THE THREAT FOR ORGANIZED SEVERE WEATHER WILL INCREASE OVER THE AREA AGAIN SUNDAY AFTERNOON AND EVENING. AREAS OF RIVER FLOODING WILL CONTINUE THROUGH MUCH OF THE NEXT SEVERAL DAYS ON PORTIONS OF THE ILLINOIS AND SPOON RIVERS. .SPOTTER INFORMATION STATEMENT... SPOTTERS ACTIVATION IS NOT ANTICIPATED. ILZ038-042>044-051>057-061>063-066>068-071>073-130730- CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DE WITT-DOUGLAS- EDGAR-EFFINGHAM-JASPER-LAWRENCE-LOGAN-MACON-MCLEAN-MOULTRIE-PIATT- RICHLAND-SANGAMON-SHELBY- 319 PM CDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS...EAST CENTRAL ILLINOIS...SOUTH CENTRAL ILLINOIS AND SOUTHEAST ILLINOIS. .DAY ONE...TONIGHT SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS THE AREA THIS AFTERNOON AND EVENING. ISOLATED THUNDERSTORMS MAY CONTAIN STRONG WINDS AND SMALL HAIL. THE THREAT FOR ADDITIONAL HEAVY RAINFALL WILL CONTINUE WHICH MAY PRODUCE LOCALIZED FLOODING AND WORSEN AREAS OF RIVER FLOODING IN PROGRESS. AREAS OF RIVER FLOODING WILL CONTINUE TONIGHT ON PORTIONS OF THE SANGAMON...LITTLE WABASH...AND WABASH RIVERS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY PERIODIC THUNDERSTORM CHANCES WILL CONTINUE SATURDAY THROUGH THURSDAY. THE THREAT FOR ORGANIZED SEVERE WEATHER WILL INCREASE OVER THE AREA AGAIN SUNDAY AFTERNOON AND EVENING. AREAS OF RIVER FLOODING WILL CONTINUE THROUGH MUCH OF THE NEXT SEVERAL DAYS ON PORTIONS OF THE SANGAMON...LITTLE WABASH...AND WABASH RIVERS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AFTER 4 PM. REPORTS OF HEAVY RAINFALL OR FLOODING WOULD BE APPRECIATED. ILZ045-046-130730- CHAMPAIGN-VERMILION- 319 PM CDT FRI JUN 12 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ILLINOIS. .DAY ONE...TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND OVERNIGHT. SCATTERED THUNDERSTORMS WILL CONTINUE ACROSS THE AREA THIS AFTERNOON AND EVENING. A FEW OF THE STORMS MAY CONTAIN DAMAGING WINDS AND HAIL. THE THREAT FOR ADDITIONAL HEAVY RAINFALL WILL CONTINUE WHICH MAY PRODUCE LOCALIZED FLOODING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY PERIODIC THUNDERSTORM CHANCES WILL CONTINUE SATURDAY THROUGH THURSDAY. THE THREAT FOR ORGANIZED SEVERE WEATHER WILL INCREASE OVER THE AREA AGAIN SUNDAY AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM 4 PM TO AROUND 10 PM. REPORTS OF HEAVY RAINFALL OR FLOODING WOULD ALSO BE APPRECIATED. BARKER
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1028 AM CDT FRI JUN 12 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM HEAVY RAIN 6 W BRADFORD 41.18N 89.77W
06/12/2015 M1.36 INCH STARK IL COCORAHS
24-HOUR RAINFALL
0740 AM HEAVY RAIN 1 SW HAVANA 40.29N 90.07W
06/12/2015 M1.14 INCH MASON IL COCORAHS
24-HOUR RAINFALL
&&
EJLPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
1036 AM CDT FRI JUN 12 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 AM HEAVY RAIN PEKIN 40.57N 89.63W
06/12/2015 M1.52 INCH TAZEWELL IL MESONET
RAINFALL SINCE 6 PM LAST NIGHT...SWOP REPORT
&&
EJLThe Lincoln radar (KILX), 94 km away, was scanning. The volume nearest the first event began at 20:27 UTC.
2 thunderstorm wind, 1 hail. Local standard time, as filed.
A tree was blown down in Tolono.
A few tree branches were blown down across I-72 about 5 miles east of Jacksonville.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2015Every state in 2015This day in weather historyWarnings in Illinois, June 2015
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: 578867, 578866, 578868.