Illinois, 2001

Tornadoes and Hail in Illinois, August 18, 2001

August 18, 2001 · NWS ILX · 38 events in 20 counties and zones

19 hail, 15 thunderstorm wind, 4 tornado, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
6
Property damage
None recorded
Crop damage
None recorded
Events
38

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.

What forecasters said that day

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 Aug 18, 9:55 AM CST, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 18, 9:55 AM CST, 1 hour 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
1055 AM CDT SAT AUG 18 2001

CURRENT FCST LOOKS ON TARGET WITH ADDITIONAL CONVECTION STARTING THIS
AFTERNOON TO NW. CONVECTION CONTINUES IN NRN PARTS OF CWA AND SHOULD
CONTINUE INTO THIS AFTERNOON AS ADDITIONAL STOROMS DEVELOP ALONG
FRONT...WHICH IS CRNTLY EXTENDING FROM LOW IN SE IA TO NW MO. BEST
INSTABILITY WILL BE IN SRN HALF OF STATE WHERE MOST SUNSHINE HAS
BEEN SO FAR. CAPE WILL BE AROUND 1500-2000 BY THIS AFTERNOON.
ADDITIONAL CONCERN IS COLD AIR ALOFT. COLD CORE SYSTEM WITH BETTER
THAN -14 AT 500 AND FREEZING LEVELS BETWEEN 10000FT AND 11000FT.

MODELS ADVERTISE PCPN STAYING NORTH WHERE...BUT BELIEVE STORMS WILL
DEVELOP ALONG FRONT WEST OF CWA AND THEN MOVE INTO MORE UNSTABLE
ENVIRONMENT...FAVORABLE FOR STORMS TO INTENSIFY THIS AFTERNOON AND
INTO THIS EVENING. BIGGEST CONCERN WILL BE HAIL AND WIND.

WITH ADDED SUNSHINE...NEED TO TWEEK TEMPS IN SRN HALF OF CWA. WILL
ALSO ADJUST PCPN WORDING IN ALL GROUPS.

.ILX...NONE.

AUTEN

In the hours before

Special weather statement, Aug 18, 10:30 AM CST, 46 minutes before
ILZ027>031-036>038-040>057-061>063-066>068-071>073-181800-

HAZARDOUS WEATHER OUTLOOK FOR CENTRAL ILLINOIS
NATIONAL WEATHER SERVICE LINCOLN IL
1130 AM CDT SAT AUG 18 2001

...RISK OF SEVERE THUNDERSTORMS TODAY ACROSS CENTRAL ILLINOIS...

A VIGOROUS UPPER LEVEL DISTURBANCE IS FORECAST TO PUSH INTO ILLINOIS
THIS AFTERNOON. THIS WILL COMBINE WITH A WARM AND HUMID AIR MASS TO
PRODUCE THUNDERSTORMS OVER THE AREA. SOME OF THESE STORMS COULD BE
SEVERE WITH THE PRIMARY THREAT BEING LARGE HAIL AND DAMAGING WINDS.
AS A RESULT...SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND
INTO THIS EVENING OVER MOST OF CENTRAL ILLINOIS.

AUTEN

The radar

The Lincoln radar (KILX), 47 km away, was scanning. The volume nearest the first event began at 17:16 UTC.

Open the radar archive at this moment

Event by event

19 hail, 15 thunderstorm wind, 4 tornado. Local standard time, as filed.

Hail, Mason

When
August 18, 11:16 AM CST to 11:42 AM CST
Where
Mason County, Manito
Measured
2.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
40.417, -89.767

Hail, McLean

When
August 18, 11:30 AM CST to 11:37 AM CST
Where
McLean County, Normal
Measured
1 in hail
Reported by
NWS EMPLOYEE(OFF DUTY)
Coordinates
40.517, -89.000

Hail, Tazewell

When
August 18, 11:35 AM CST to 11:39 AM CST
Where
Tazewell County, 6 mi SW of Delavan
Measured
2.5 in hail
Reported by
LAW ENFORCEMENT
Coordinates
40.300, -89.633

Tornado, Mason

When
August 18, 11:36 AM CST to 11:37 AM CST
Where
Mason County, 5 mi N of Mason City
Rating
F0
Path length
0.1 mi
Path width
25 yd
Reported by
NWS STORM SURVEY
Coordinates
40.283, -89.700

A tornado briefly touched down 5.3 miles north of Mason City. It ripped off a large top of a tree and carried it 100 feet. One small tree was snapped. All gutters on a house were lifted off, as well as a table being blown into a open garage door (facing south). A door on the house was also blown open with the air moving through the attic in the house breaking out some windows. A small shed nearby was intact. Fire officials about 1.5 miles south of the house saw swirling clouds over the house's location. No injuries were reported.

Hail, Logan

When
August 18, 11:39 AM CST to 12:05 PM CST
Where
Logan County, San Jose
Measured
3.75 in hail
Reported by
EMERGENCY MANAGER
Coordinates
40.300, -89.600

Hail varying in size from 3/4 inch to 3.75 inches fell across northern Logan County. The largest hail occurred in San Jose.

Thunderstorm Wind, Logan

When
August 18, 12:19 PM CST
Where
Logan County, 4 mi ENE of Emden
Measured
50 kt (58 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.317, -89.417

A power pole was blown down onto US Highway 136, two miles east of Interstate 155.

Hail, Logan

When
August 18, 12:40 PM CST
Where
Logan County, New Holland
Measured
1 in hail
Reported by
EMERGENCY MANAGER
Coordinates
40.183, -89.583

Hail, Champaign

When
August 18, 12:58 PM CST to 1:10 PM CST
Where
Champaign County, 2 mi N of Rantoul
Measured
1 in hail
Reported by
NEWSPAPER
Coordinates
40.350, -88.150

Hail up to one inch in diameter fell in a swath from 2 miles north of Rantoul to 2 miles northeast of Rantoul. It covered the ground at the Brookhill Golf Course. Also, several homes sustained siding damage due to the hail.

Thunderstorm Wind, Champaign

When
August 18, 12:58 PM CST to 1:10 PM CST
Where
Champaign County, 2 mi N of Rantoul
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
40.350, -88.150

Several large trees were blown down.

Thunderstorm Wind, De Witt

When
August 18, 1:00 PM CST to 1:15 PM CST
Where
De Witt County, 2 mi N of Clinton
Measured
52 kt (60 mph)
Reported by
NWS STORM SURVEY
Coordinates
40.183, -88.950

Damaging downburst winds moved across central portions of Dewitt county. The path of the damage was two to three miles wide and extended from 2.25 miles north of Clinton to Dewitt to 2.5 miles north of Weldon. The extent of the damage included a cement block wall blown over at a construction site north of Clinton, campers blown over at Clinton Lake State Park, siding damage to numerous homes, sporadic trees and tree limbs blown down, plus crop damage. A warehouse at a power plant sustained some roof damage and and empty grain bin was picked up and carried around 150 feet. No injuries were reported.

Tornado, De Witt

When
August 18, 1:05 PM CST to 1:08 PM CST
Where
De Witt County, De Witt
Rating
F0
Path length
0.3 mi
Path width
100 yd
Reported by
NWS STORM SURVEY
Coordinates
40.183, -88.783

A tornado formed along the leading edge of downburst winds just northwest of Dewitt. It moved southeast into town before lifting. It blew a chimney off of a church as well as some of its windows. Also, two homes sustained roof damage and a garage was blown down. Numerous large trees were ripped up and blown over. No injuries were reported.

Hail, Menard

When
August 18, 1:11 PM CST to 1:18 PM CST
Where
Menard County, 2 mi S of Atterberry
Measured
1 in hail
Reported by
EMERGENCY MANAGER
Coordinates
40.017, -89.900

Thunderstorm Wind, Piatt

When
August 18, 1:23 PM CST to 1:35 PM CST
Where
Piatt County, 5 mi N of Deland
Measured
55 kt (63 mph)
Reported by
NWS STORM SURVEY
Coordinates
40.183, -88.650

Downburst winds caused sporadic damage in the county in a two to three mile wide area. Several large trees were blown down. A door on a machine shed was blown in and sporadic crop damage was noted. No injuries were reported.

Hail, Logan

When
August 18, 1:26 PM CST to 1:35 PM CST
Where
Logan County, Broadwell
Measured
0.75 in hail
Reported by
EMERGENCY MANAGER
Coordinates
40.067, -89.450

Thunderstorm Wind, Vermilion

When
August 18, 1:31 PM CST to 1:50 PM CST
Where
Vermilion County, Hoopeston
Measured
52 kt (60 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.467, -87.667

A large tree was blown down near Rossville.

Thunderstorm Wind, Champaign

When
August 18, 1:40 PM CST to 1:55 PM CST
Where
Champaign County, Mahomet
Measured
62 kt (71 mph)
Reported by
GENERAL PUBLIC
Coordinates
40.200, -88.400

Thunderstorm winds damaged the roof of a barber shop on the west side of Champaign. Also, a large tree was blown down on top of an unoccupied truck.

Hail, Macon

When
August 18, 2:10 PM CST to 2:15 PM CST
Where
Macon County, 5 mi W of Decatur
Measured
1.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
39.850, -89.050

Tornado, Champaign

When
August 18, 2:14 PM CST to 2:15 PM CST
Where
Champaign County, 2 mi W of Ogden
Rating
F0
Path length
0.1 mi
Path width
20 yd
Reported by
BROADCAST MEDIA
Coordinates
40.117, -87.983

A tornado briefly touched down in a field. No damage or injuries were reported.

Hail, Sangamon

When
August 18, 2:15 PM CST to 2:20 PM CST
Where
Sangamon County, Buffalo
Measured
1 in hail
Reported by
EMERGENCY MANAGER
Coordinates
39.850, -89.417

Hail, Piatt

When
August 18, 2:20 PM CST
Where
Piatt County, Monticello
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
40.033, -88.567

Hail, Champaign

When
August 18, 2:25 PM CST to 3:06 PM CST
Where
Champaign County, Ivesdale
Measured
1.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
39.933, -88.450

Hail ranging from dime to golf ball size was reported in Ivesdale, Tolono, Pesotum, Philo and Broadlands.

Thunderstorm Wind, Piatt

When
August 18, 2:29 PM CST to 2:30 PM CST
Where
Piatt County, Atwood
Measured
50 kt (58 mph)
Reported by
EMERGENCY MANAGER
Coordinates
39.800, -88.467

Several trees, tree limbs, and power lines were blown down in Atwood near the Piatt/Moultrie/Douglas county lines.

Thunderstorm Wind, Moultrie

When
August 18, 2:29 PM CST to 2:30 PM CST
Where
Moultrie County, 10 mi NE of Lovington
Measured
50 kt (58 mph)
Reported by
EMERGENCY MANAGER
Coordinates
39.817, -88.500

Several trees, tree limbs, and power lines were blown down in and around Atwood on the Piatt/Moultrie/Douglas county lines.

Thunderstorm Wind, Douglas

When
August 18, 2:30 PM CST to 3:19 PM CST
Where
Douglas County, 9 mi W of Tuscola
Measured
50 kt (58 mph)
Injuries
6 direct, 0 indirect
Reported by
EMERGENCY MANAGER
Coordinates
39.800, -88.450

Six people were injured at a local festival in Atwood from flying debris, which is west of Tuscola on the Douglas/Piatt county line. One of the people injured was taken to a local hospital. Several power lines were reported down as well as a number of trees falling onto cars and houses in Atwood. Also, numerous power lines were blown down in Tuscola, Arthur and Arcola. Several large trees were blown down in Tuscola.

Thunderstorm Wind, Macon

When
August 18, 2:44 PM CST
Where
Macon County, Argenta
Measured
50 kt (58 mph)
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
39.983, -88.817

Large tree fell onto the roof of a house.

Hail, Macon

When
August 18, 2:44 PM CST
Where
Macon County, Argenta
Measured
0.75 in hail
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
39.983, -88.817

Tornado, Champaign

When
August 18, 2:51 PM CST
Where
Champaign County, 5 mi S of Philo
Rating
F0
Path length
0.1 mi
Path width
5 yd
Reported by
TRAINED SPOTTER
Coordinates
39.933, -88.150

A brief touchdown was noted over an open field by an University of Illinois student and his wife. No damage was reported.

Hail, Moultrie

When
August 18, 2:54 PM CST
Where
Moultrie County, Lovington
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
39.717, -88.633

Hail, Vermilion

When
August 18, 3:10 PM CST to 3:24 PM CST
Where
Vermilion County, Allerton
Measured
2 in hail
Reported by
EMERGENCY MANAGER
Coordinates
39.917, -87.850

Hail, Christian

When
August 18, 3:14 PM CST
Where
Christian County, Morrisonville
Measured
1.25 in hail
Reported by
EMERGENCY MANAGER
Coordinates
39.417, -89.467

Thunderstorm Wind, Edgar

When
August 18, 3:30 PM CST to 3:55 PM CST
Where
Edgar County, 1 mi W of Horace
Measured
50 kt (58 mph)
Reported by
EMERGENCY MANAGER
Coordinates
39.717, -87.717

A few trees and tree limbs were blown down one mile west of Horace and in Nevins.

Hail, Shelby

When
August 18, 3:45 PM CST
Where
Shelby County, Tower Hill
Measured
0.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
39.383, -88.967

Thunderstorm Wind, Coles

When
August 18, 3:59 PM CST
Where
Coles County, Mattoon
Measured
50 kt (58 mph)
Reported by
OFFICIAL NWS OBS.
Coordinates
39.483, -88.367

A large tree limb was blown down, landing on the roof of a motel causing minor damage.

Hail, Crawford

When
August 18, 4:17 PM CST to 4:40 PM CST
Where
Crawford County, Oblong
Measured
0.75 in hail
Reported by
OFFICIAL NWS OBS.
Coordinates
39.000, -87.917

Dime size hail was reported in Oblong, Robinson and Palestine.

Thunderstorm Wind, Crawford

When
August 18, 4:30 PM CST
Where
Crawford County, 2 mi S of Duncanville
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
38.933, -87.683

Thunderstorm winds caused minor shingle damage to one home, blew over a large tree, as well as numerous tree limbs.

Thunderstorm Wind, Effingham

When
August 18, 5:00 PM CST
Where
Effingham County, Effingham
Measured
50 kt (58 mph)
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
39.117, -88.533

Thunderstorm winds blew down several large tree limbs and power lines.

Thunderstorm Wind, Jasper

When
August 18, 5:55 PM CST
Where
Jasper County, Newton
Measured
50 kt (58 mph)
Reported by
LAW ENFORCEMENT
Coordinates
38.983, -88.167

Trees and power lines were blown down across the town.

Hail, Crawford

When
August 18, 6:18 PM CST
Where
Crawford County, Robinson
Measured
0.75 in hail
Reported by
EMERGENCY MANAGER
Coordinates
39.000, -87.733

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Illinois in 2001Every state in 2001This day in weather historyThe tornado archive for Illinois, 2001Warnings in Illinois, August 2001

Sources

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: 5266237, 5266239, 5266238, 5266344, 5266240, 5266241, 5266334, 5266459, 5266460, 5266243, 5266242, 5266245, 5266244, 5266246, 5266247, 5266330, 5266331, 5266332, 5266333, 5266336, 5266335, 5266455, 5266457, 5266347, 5266338, 5266346, 5266345, 5266456, 5266337, 5266339, 5266458, 5266340, 5266454, 5266341, 5266461, 5266453, 5266343, 5266342.