Thunderstorm Wind, Boone
- When
- July 23, 4:15 PM CST
- Where
- Boone County, Central Portion
- Measured
- 50 kt (58 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.320, -88.780
Tree limbs down from thunderstorm winds.
Damaging Winds in Illinois, July 23, 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
- None recorded
- 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 Milwaukee radar (KMKX), 74 km away, was scanning. The volume nearest the first event began at 22:12 UTC.
Event by event
5 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, McHenry
- When
- July 23, 4:30 PM CST
- Where
- McHenry County, Central Portion
- Measured
- 50 kt (58 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 42.320, -88.430
Several trees down from thunderstorm winds.
Thunderstorm Wind, Kane
- When
- July 23, 4:38 PM CST
- Where
- Kane County, Carpentersville
- Measured
- 59 kt (68 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.130, -88.250
Thunderstorm Wind, Kane
- When
- July 23, 5:06 PM CST
- Where
- Kane County, Sugar Grove
- Measured
- 55 kt (63 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 41.750, -88.450
Thunderstorm winds tore the roof off of a building.
Thunderstorm Wind, Kankakee
- When
- July 23, 5:24 PM CST
- Where
- Kankakee County, Herscher to Kankakee
- Measured
- 50 kt (58 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 41.050, -88.100
Trees down south of Illinois Route 17 in the vicinity of Herscher and Kankakee.
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 Missouri, July 23 to 31, 1999
- Heat in Pennsylvania, July 23 to 31, 1999
- Heat in Wisconsin, July 23 to 31, 1999
- Hail and Damaging Winds in Michigan, July 23, 1999
- Heat in Minnesota, July 23 to 25, 1999
- Heat in Maryland, July 23 to 31, 1999
- Heat in South Carolina, July 23, 1999
- Heat in Arkansas, July 23, 1999
- Heat in Delaware, July 23 to 31, 1999
- Hail and Damaging Winds in Wisconsin, July 23, 1999
- Tornadoes and Hail in Michigan, July 23, 1999
- Hail and Damaging Winds in Ohio, July 23, 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: 5710068, 5710069, 5710066, 5710067, 5710070.