Illinois, 1998

Tornadoes and Hail in Illinois, June 28 to 29, 1998

June 28 to 29, 1998 · NWS DVN · 16 events in 9 counties and zones

Supercell thunderstorms over Iowa intensified into a squall line which moved southeastward causing widespread damage across Eastern Iowa into Western Illinois. In Western Illinois the storms spun up at least three non-supercell tornadoes near New Boston, Keithsburg and Roseville.

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
0
Property damage
$22,000
Crop damage
$500
Events
16

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 happened

The episode as NWS DVN wrote it up.

Supercell thunderstorms over Iowa intensified into a squall line which moved southeastward causing widespread damage across Eastern Iowa into Western Illinois. In Western Illinois the storms spun up at least three non-supercell tornadoes near New Boston, Keithsburg and Roseville. However, the majority of damage was caused by 60 to greater than 100 mph straightline winds. The strong winds flattened farm fields, damaged roofs, and blew over semitrailers. Numerous trees and power lines downed by the storm resulted in power and telephone outages lasting from a few hours, to several days at the most seriously damaged locations. In Hancock and Henderson counties 30 electrical poles were broken. Illinois utility companies reported that more than 58,000 homes and businesses were affected by outages. Some very large trees at Oquawaka and near the Big River State Forest were uprooted by winds estimated at 90 mph. Damage was heavy to homes, trees and outbuildings in Keithsburg, Blandinsville, Woodhull, Cordova, Little York, Macomb, Good Hope, Colchester, Wyanet, Spring Valley, Hennepin, and Hamilton. The Mercer Couty Fairgrounds at Aledo also reported heavy damage.

The radar

The Quad Cities radar (KDVN), 89 km away, was scanning. The volume nearest the first event began at 06:59 UTC.

Open the radar archive at this moment

Event by event

12 thunderstorm wind, 3 tornado, 1 hail. Local standard time, as filed.

Thunderstorm Wind, Bureau

When
June 28, 1:00 AM CST
Where
Bureau County, 3 mi NE of Wyanet
Crop damage
$500
Reported by
EMERGENCY MANAGER
Coordinates
41.400, -89.550

Thunderstorm Wind, Mercer

When
June 29, 2:22 PM CST to 3:30 PM CST
Where
Mercer County, Countywide
Measured
56 kt (64 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.200, -90.780

Thunderstorm Wind, Rock Island

When
June 29, 2:26 PM CST to 3:30 PM CST
Where
Rock Island County, Countywide
Measured
52 kt (60 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.550, -90.650

Thunderstorm Wind, McDonough

When
June 29, 2:30 PM CST to 4:00 PM CST
Where
McDonough County, Countywide
Measured
70 kt (81 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.470, -90.670

Thunderstorm Wind, Henderson

When
June 29, 2:30 PM CST to 3:50 PM CST
Where
Henderson County, Countywide
Measured
74 kt (85 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.870, -90.970

Thunderstorm Wind, Henry

When
June 29, 2:40 PM CST to 3:50 PM CST
Where
Henry County, Countywide
Measured
52 kt (60 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.370, -90.130

Thunderstorm Wind, Warren

When
June 29, 2:40 PM CST to 3:45 PM CST
Where
Warren County, Countywide
Measured
78 kt (90 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.850, -90.570

Tornado, Mercer

When
June 29, 2:40 PM CST
Where
Mercer County, New Boston
Rating
F1
Path length
1 mi
Path width
2 yd
Property damage
$5,000
Reported by
LAW ENFORCEMENT
Coordinates
41.170, -91.000

Thunderstorm Wind, McDonough

When
June 29, 2:45 PM CST
Where
McDonough County, 3 mi S of Blandinsville
Measured
95 kt (109 mph)
Reported by
OTHER FEDERAL AGENCY
Coordinates
40.500, -90.870

Thunderstorm Wind, Hancock

When
June 29, 2:45 PM CST to 3:50 PM CST
Where
Hancock County, Countywide
Measured
52 kt (60 mph)
Reported by
EMERGENCY MANAGER
Coordinates
40.400, -91.200

Tornado, Warren

When
June 29, 3:08 PM CST
Where
Warren County, 8 mi E of Roseville
Rating
F0
Path length
1 mi
Path width
2 yd
Property damage
$2,000
Reported by
LAW ENFORCEMENT
Coordinates
40.730, -90.520

Thunderstorm Wind, McDonough

When
June 29, 3:16 PM CST
Where
McDonough County, Macomb
Measured
76 kt (87 mph)
Reported by
GENERAL PUBLIC
Coordinates
40.470, -90.670

Tornado, Henderson

When
June 29, 3:35 PM CST
Where
Henderson County, 3 mi W of Bald Bluff
Rating
F1
Path length
1 mi
Path width
100 yd
Property damage
$15,000
Reported by
LAW ENFORCEMENT
Coordinates
41.020, -90.900

Thunderstorm Wind, Bureau

When
June 29, 3:48 PM CST to 4:00 PM CST
Where
Bureau County, Countywide
Measured
70 kt (81 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.380, -89.450

Thunderstorm Wind, Putnam

When
June 29, 3:55 PM CST to 4:45 PM CST
Where
Putnam County, Countywide
Measured
52 kt (60 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.030, -89.280

Hail, Hancock

When
June 29, 5:15 PM CST
Where
Hancock County, Hamilton
Measured
1 in hail
Reported by
LAW ENFORCEMENT
Coordinates
40.400, -91.350

What these are

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.
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.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

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

The same day elsewhere

More

Every storm in Illinois in 1998Every state in 1998This day in weather historyThe tornado archive for Illinois, 1998Warnings in Illinois, June 1998

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: 5666462, 5666455, 5666457, 5666454, 5666491, 5666453, 5666458, 5666459, 5666486, 5666490, 5666460, 5666487, 5666461, 5666489, 5666456, 5666488.