Hail, Warren
- When
- May 8, 7:55 PM CST
- Where
- Warren County, Roseville
- Measured
- 0.88 in hail
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.733, -90.667
Tornado and Hail in Illinois, May 8, 2000
An outflow boundary laid down from morning thunderstorms was located in an east-west fashion near the Illinois and Wisconsin border by early afternoon. The outflow intersected an advancing cold front over East Central Iowa, which enhanced low level convergence.
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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $1,000
- Crop damage
- None recorded
- Events
- 5
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.
An outflow boundary laid down from morning thunderstorms was located in an east-west fashion near the Illinois and Wisconsin border by early afternoon. The outflow intersected an advancing cold front over East Central Iowa, which enhanced low level convergence. However, the atmosphere remained strongly capped, which allowed for only isolated thunderstorms to develop over Eastern Iowa by mid afternoon. These storms did not generate any reports of severe weather in Eastern Iowa, although they did produce heavy rain, gusty winds and small hail. As the thunderstorms crossed the Mississippi River into West Central Illinois during the evening they intensified. The cap had eroded with the aid of an upper level jet max. The atmosphere was very unstable with Capes of 2500-3500 J/Kg, while deep layer shear from the surface to 6 kilometers was marginal for supercells at 30 to 40 knots. The storms quickly became severe producing large hail and damaging winds in Hancock, Warren and Henry Counties. A weak, short lived tornado was spawned by one of the storms 4 miles west of Kewanee. The tornado touched down in a rural area doing no damage and causing no injuries.
The radar
The Quad Cities radar (KDVN), 98 km away, was scanning. The volume nearest the first event began at 01:53 UTC.
Event by event
2 hail, 2 thunderstorm wind, 1 tornado. Local standard time, as filed.
Thunderstorm Wind, Hancock
- When
- May 8, 8:06 PM CST
- Where
- Hancock County, Hamilton
- Property damage
- $1,000
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.400, -91.350
Tornado, Henry
- When
- May 8, 8:11 PM CST
- Where
- Henry County, 4 mi W of Kewanee
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.233, -90.017
Hail, Hancock
- When
- May 8, 8:12 PM CST
- Where
- Hancock County, La Harpe
- Measured
- 1 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.583, -90.967
Thunderstorm Wind, Henry
- When
- May 8, 8:20 PM CST
- Where
- Henry County, Kewanee
- Measured
- 52 kt (60 mph)
- Reported by
- NEWSPAPER
- Coordinates
- 41.233, -89.933
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Hail in Illinois, May 8, 2000
- Flash Flooding and Hail in Oklahoma, May 8 to 9, 2000
- Damaging Winds in Iowa, May 8, 2000
- Hail and Damaging Winds in Michigan, May 8 to 9, 2000
- Damaging Winds in Michigan, May 8 to 9, 2000
- Hail and Damaging Winds in Wisconsin, May 8, 2000
- Hail and Lightning Strikes in Missouri, May 8, 2000
- Hail in Oklahoma, May 8, 2000
- Hail and Lightning Strikes in Wisconsin, May 8, 2000
- Flash Flood and Damaging Winds in Iowa, May 8, 2000
- Hail and Lightning Strike in Massachusetts, May 8, 2000
- Damaging Winds in Illinois, May 8, 2000
More
Every storm in Illinois in 2000Every state in 2000This day in weather historyThe tornado archive for Illinois, 2000Warnings in Illinois, May 2000
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: 5146613, 5146614, 5146702, 5146701, 5146703.