Thunderstorm Wind, Cook
- When
- July 21, 5:00 PM CST
- Where
- Cook County, Oak Lawn
- Measured
- 55 kt (63 mph)
- Reported by
- NEWSPAPER
- Coordinates
- 41.720, -87.750
Thunderstorm winds tore the roof off a three-story apartment building.
Damaging Winds in Illinois, July 21, 1999
5 thunderstorm wind, 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $50,000
- 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.
The radar
The Chicago radar (KLOT), 31 km away, was scanning. The volume nearest the first event began at 22:58 UTC.
Event by event
5 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, De Kalb
- When
- July 21, 5:20 PM CST
- Where
- De Kalb County, De Kalb
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.930, -88.750
Thunderstorm Wind, Kane
- When
- July 21, 6:00 PM CST
- Where
- Kane County, Central Portion
- Measured
- 50 kt (58 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.920, -88.370
Several trees and tree limbs were blown down by thunderstorm winds.
Thunderstorm Wind, Kendall
- When
- July 21, 8:01 PM CST
- Where
- Kendall County, Oswego
- Measured
- 50 kt (58 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.680, -88.350
Trees blown down from thunderstorm winds.
Thunderstorm Wind, Grundy
- When
- July 21, 8:30 PM CST
- Where
- Grundy County, Minooka
- Measured
- 55 kt (63 mph)
- Property damage
- $50,000
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.450, -88.270
Two miles west of Minooka downed trees destroyed three manufactured homes, damaged several other homes , and caused extensive damage to a number of vehicles.
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Illinois, July 21 to 25, 1999
- Lightning Strike in Colorado, July 21, 1999
- Tornadoes and Hail in Montana, July 21, 1999
- Flash Flood in New Mexico, July 21, 1999
- Lightning Strike in Florida, July 21, 1999
- Flash Flood in Nebraska, July 21, 1999
- Flash Flood and Hail in Virginia, July 21, 1999
- Damaging Winds in Michigan, July 21, 1999
- Damaging Wind in North Dakota, July 21, 1999
- Hail and Damaging Winds in Ohio, July 21, 1999
- Damaging Winds in Ohio, July 21, 1999
- Hail and Damaging Winds in Georgia, July 21, 1999
More
Every storm in Illinois in 1999Every state in 1999This day in weather historyWarnings in Illinois, July 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: 5710060, 5710061, 5710062, 5710063, 5710064.