Illinois, 1999

Flood and Damaging Winds in Illinois, August 23, 1999

August 23, 1999 · NWS DVN · 8 events in 4 counties and zones

7 thunderstorm wind, 1 flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
8

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 radar

The national radar mosaic for the moment the first event began.

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Event by event

7 thunderstorm wind, 1 flood. Local standard time, as filed.

Thunderstorm Wind, Rock Island

When
August 23, 3:20 PM CST
Where
Rock Island County, Rock Is
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.500, -90.580

Several trees downed on 45th and 10th streets.

Flood, Rock Island

When
August 23, 3:30 PM CST
Where
Rock Island County, Barstow
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
41.467, -90.567 (the zone’s center; the record gives no point)

Two inches of rain in 30 minutes resulted in minor street flooding.

Thunderstorm Wind, Rock Island

When
August 23, 3:30 PM CST
Where
Rock Island County, Barstow to Babcock Addition
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.520, -90.370

Power poles downed.

Thunderstorm Wind, Bureau

When
August 23, 4:00 PM CST
Where
Bureau County, Depue
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.320, -89.320

Tree limbs downed.

Thunderstorm Wind, Henderson

When
August 23, 4:04 PM CST
Where
Henderson County, Stronghurst
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
40.750, -90.900

Thunderstorm Wind, Henderson

When
August 23, 4:10 PM CST
Where
Henderson County, 4 mi W of Media
Measured
55 kt (63 mph)
Reported by
LAW ENFORCEMENT
Coordinates
40.780, -90.920

Trees downed.

Thunderstorm Wind, Henderson

When
August 23, 4:19 PM CST
Where
Henderson County, Stronghurst
Measured
55 kt (63 mph)
Reported by
TRAINED SPOTTER
Coordinates
40.750, -90.900

Power lines downed.

Thunderstorm Wind, Warren

When
August 23, 4:42 PM CST
Where
Warren County, Roseville
Measured
52 kt (60 mph)
Reported by
TRAINED SPOTTER
Coordinates
40.730, -90.670

Several 12 inch diameter tree limbs and power lines downed.

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.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Illinois in 1999Every state in 1999This day in weather historyWarnings in Illinois, August 1999

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: 5718592, 5718593, 5718594, 5718595, 5718596, 5718597, 5718598, 5718677.