Scattered thunderstorms developed in a very warm and humid airmass well ahead of an approaching cold front across Iowa and Missouri during the late afternoon and early evening of June 20th. A couple of the cells produced damaging wind gusts of around 60mph and locally heavy rainfall, with isolated flash flooding in the Peoria Metro area.
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.
Scattered thunderstorms developed in a very warm and humid airmass well ahead of an approaching cold front across Iowa and Missouri during the late afternoon and early evening of June 20th. A couple of the cells produced damaging wind gusts of around 60mph and locally heavy rainfall, with isolated flash flooding in the Peoria Metro area.
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 20, 2:02 PM CST, 2 hours 53 minutes earlier.
Area Forecast Discussion National Weather Service Lincoln IL 302 PM CDT Wed Jun 20 2018 .SHORT TERM...(This evening through Thursday) ISSUED AT 300 PM CDT Wed Jun 20 2018 Surface low in western IA triggering convection from eastern IA into eastern MO this afternoon in very unstable airmass. Satellite imagery depicts difluent flow over mid MS river valley ahead of the NE upper lowOld boundary from OH valley waves back over IL into the IA region and providing focus for major convection in IA. Best instability and flow aloft to rotate over east IA into northern IL. Trailing convergence boundary into MO will slowly rotate around low and push into western IL later this evening. Scattered storms to move into CWA, with NAM prod about the best on timing, but still might be a bit fast. Most of convection to affect northwest 1/2 of CWA, but secondary area of pcpn to also develop overnight over MO and move northeast into the central and eastern part of area. By Thurs, low center closed off and wobbles to the southeast into northern MO. This will be enough with unstable airmass to again trigger afternoon scattered convection over area ahead of low. && .LONG TERM...(Thursday night through Wednesday) ISSUED AT 300 PM CDT Wed Jun 20 2018 Low center to continue to wobble to the east, slowly moving over IL on Thurs night and Fri. this will again be enough tto trigger scattered instability storms in moist air over area. Low exits area by Sat, bringing a break in the chance of pcpn. Another, weaker system moves through on Sunday and will bring a chance for storms with its passage. Dry conditions will be the rule early in the week, before another system affects the area on Tues night and Wed. && .AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon) Issued at 1235 PM CDT Wed Jun 20 2018 Surface low over western IA associated with upper low over western NE will rotate a wave of pcpn development into the region late afternoon and this evening. Therefore VCTS in the forecast for region this evening. Moisture and pcpn to remain in region overnight, bringing MVFR cigs by morning in periods of showers. Some slight improvement in cigs by end of forecast period. && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...Goetsch LONG TERM...Goetsch AVIATION...Goetsch
Hazardous Weather Outlook National Weather Service Lincoln IL 332 PM CDT Wed Jun 20 2018 ILZ027>031-036>038-040>043-047>053-211100- Cass-Christian-De Witt-Fulton-Knox-Logan-Macon-Marshall-Mason- McLean-Menard-Morgan-Peoria-Sangamon-Schuyler-Scott-Stark- Tazewell-Woodford- 332 PM CDT Wed Jun 20 2018 This Hazardous Weather Outlook is for portions of central Illinois and west central Illinois. .DAY ONE...TONIGHT... Thunderstorms will become more numerous across the area this evening as a slow-moving low pressure system approaches from the west. While widespread severe weather is not expected, a few of the stronger cells will be capable of gusty 40-50 mph winds and locally heavy rainfall. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... Thunderstorms chances will continue Thursday and Friday. A few of the storms could produce damaging wind gusts Thursday afternoon and evening. In addition, locally heavy rainfall will be likely both days. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required this evening. ILZ044>046-054>057-061>063-066>068-071>073-211100- Champaign-Clark-Clay-Coles-Crawford-Cumberland-Douglas-Edgar- Effingham-Jasper-Lawrence-Moultrie-Piatt-Richland-Shelby- Vermilion- 332 PM CDT Wed Jun 20 2018 This Hazardous Weather Outlook is for portions of central Illinois, east central Illinois and southeast Illinois. .DAY ONE...TONIGHT... Widely scattered thunderstorms will be possible through this evening...with thunderstorms becoming more numerous after midnight. Severe weather is not expected: however, some of the cells will be capable of producing locally heavy rainfall. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... Thunderstorms chances will continue Thursday and Friday. A few of the storms could produce damaging wind gusts Thursday afternoon and evening. In addition, locally heavy rainfall will be likely both days. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated tonight. Barnes
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
1203 PM CDT WED JUN 20 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0315 PM TSTM WND DMG WEST JERSEY 41.02N 89.93W
06/19/2018 STARK IL PUBLIC
ROAD SIGN BENT, CORN FLATTED. RELAYED VIA WMBD-TV.
0330 PM TSTM WND DMG GALESBURG 40.95N 90.38W
06/19/2018 KNOX IL FIRE DEPT/RESCUE
POWER LINE DOWN IN GALESBURG
0345 PM TSTM WND DMG 3 SW CANTON 40.53N 90.08W
06/19/2018 FULTON IL PUBLIC
4 INCH TREE BRANCHES BROKEN OFF AT SPOON RIVER COLLEGE.
SOCIAL MEDIA REPORT.
0400 PM TSTM WND DMG 5 WNW PEORIA 40.78N 89.69W
06/19/2018 PEORIA IL PUBLIC
LARGE TREE BRANCH BROKEN WEST OF SHOPPES OF GRAND
PRAIRIE. RELAYED VIA WMBD-TV. TIME ESTIMATED.
0430 PM LIGHTNING PEORIA HEIGHTS 40.75N 89.57W
06/19/2018 PEORIA IL NEWSPAPER
HOUSE STRUCK BY LIGHTNING AND CAUGHT FIRE. THE
ELECTRICITY WAS CARRIED TO A SECOND HOUSE, WHICH ALSO
CAUGHT FIRE. REPORTED BY PEORIA JOURNAL STAR.
0443 PM TSTM WND DMG JACKSONVILLE 39.73N 90.23W
06/19/2018 MORGAN IL CO-OP OBSERVER
DELAYED REPORT. TWO LARGE TREES DOWN IN JACKSONVILLE. ONE
FELL ON A FENCE. TIME ESTIMATED FROM RADAR.
0510 PM TSTM WND DMG NEW BERLIN 39.73N 89.91W
06/19/2018 SANGAMON IL MESONET
A LARGE TREE BRANCH WAS BLOWN DOWN.
0518 PM TSTM WND DMG CHATHAM 39.67N 89.70W
06/19/2018 SANGAMON IL NWS EMPLOYEE
4 INCH LIMB FELL ONTO SOME POWER LINES. OCCURRED WITH THE
GUST FRONT AHEAD OF THE STORMS.
0610 PM TSTM WND DMG DECATUR 39.85N 88.93W
06/19/2018 MACON IL PUBLIC
LARGE TREE SNAPPED IN 1400 BLOCK OF WEST RIVERVIEW ST.
RELAYED VIA WAND-TV SOCIAL MEDIA.
0618 PM TSTM WND GST DECATUR AIRPORT 39.83N 88.87W
06/19/2018 M53.00 MPH MACON IL ASOS
0624 PM FUNNEL CLOUD DECATUR AIRPORT 39.83N 88.87W
06/19/2018 MACON IL PUBLIC
PUBLIC REPORT NEAR THE AIRPORT. RELAYED VIA WAND-TV.
&&
BARNESSpecial Weather Statement National Weather Service Lincoln IL 420 PM CDT WED JUN 20 2018 ILZ031-038-202200- Woodford-McLean- 420 PM CDT WED JUN 20 2018 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WOODFORD COUNTY UNTIL 500 PM CDT... At 420 PM CDT, Doppler radar was tracking a strong thunderstorm over Goodfield, or near Eureka, moving northeast at 15 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Eureka, Goodfield, Secor, Congerville, Kappa and Evergreen Lake. This includes the following highways... Interstate 39 between mile markers 8 and 12. Interstate 74 between mile markers 112 and 118. LAT...LON 4065 8895 4057 8923 4067 8933 4077 8916 TIME...MOT...LOC 2120Z 232DEG 12KT 4062 8924 SB
Special Weather Statement
National Weather Service Lincoln IL
523 PM CDT WED JUN 20 2018
ILZ027-036-202330-
Knox-Fulton-
523 PM CDT WED JUN 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FULTON AND KNOX
COUNTIES UNTIL 630 PM CDT...
At 523 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near North Henderson to near Little Swan Lake.
Movement was east at 35 mph.
Wind gusts up to 50 mph will be possible with these storms.
Locations impacted include...
Galesburg, Abingdon, Knoxville, Farmington, Wataga, Avon, Oneida,
Yates City, Williamsfield, Altona, Fairview, London Mills, Victoria,
Maquon, Rio, Gilson, East Galesburg, Henderson, Norris and St.
Augustine.
This includes Interstate 74 between mile markers 34 and 68.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4115 8999 4072 8998 4062 8999 4058 9044
4115 9044
TIME...MOT...LOC 2223Z 258DEG 32KT 4115 9049 4071 9050
GoetschSpecial Weather Statement
National Weather Service Lincoln IL
549 PM CDT WED JUN 20 2018
ILZ040-202345-
Schuyler-
549 PM CDT WED JUN 20 2018
...SIGNIFICANT WEATHER ADVISORY FOR SCHUYLER COUNTY UNTIL 645 PM
CDT...
At 548 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Colmar to near Clayton. Movement was east
at 40 mph.
Wind gusts up to 50 mph will be possible with these storms.
Locations impacted include...
Rushville, Littleton, Huntsville, Camden, Ripley, Weinberg King State
Park and Ray.
LAT...LON 4029 9091 4027 9045 4019 9045 3998 9052
3998 9061 4000 9060 4002 9061 4003 9061
4002 9063 4005 9068 4008 9067 4008 9070
4010 9070 4011 9071 4011 9091
TIME...MOT...LOC 2248Z 259DEG 36KT 4039 9093 4003 9100
GoetschThe Quad Cities radar (KDVN), 76 km away, was scanning. The volume nearest the first event began at 22:53 UTC.
2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
A few trees and power lines were blown down in Galesburg. One tree fell onto a house.
Rainfall rates of 2.00 to 3.00 inches in one hour produced rapid flash flooding in southern and eastern Peoria County, including the west side of the city of Peoria. Several streets were flooded in the vicinity of the Northwoods Mall in Peoria, as well as in Bartonville. Rural roads between Hanna City and Bellevue were also flooded. The flooding subsided before 3:00 am CDT on June 21st.
A 12-inch diameter tree branch was blown onto a passing car.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2018Every state in 2018This day in weather historyWarnings in Illinois, June 2018
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: 757744, 771003, 757745.