Heat, Henry
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Henry forecast zone
- Deaths
- 1 direct, 0 indirect
- Reported by
- NEWSPAPER
- Coordinates
- 41.353, -90.131 (the zone’s center; the record gives no point)
Heat in Illinois, July 19 to 31, 1999
S. produced very hot and humid conditions over the midwest from mid to late July.
Where it happened
Every event with a place to put it; 13 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
The toll
- Deaths
- 1
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 13
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.
A strong ridge of high pressure over the central U.S. produced very hot and humid conditions over the midwest from mid to late July. Heat advisories and warnings were issued for portions of western Illinois during the period. Temperatures around the 100 degree mark combined with dewpoints in the 70s produced heat indicies of 105 to as high as 125 degrees. The Henry County (Illinois) Coroner cited heat-related factors as the cause of death of an elderly Kewanee man on July 28th. Newspaper accounts indicate at least 19 people in Illinois, and 27 in Missouri, died from heat-related factors since July 19th.
The radar
The national radar mosaic for the moment the first event began.
Event by event
13 heat. Local standard time, as filed.
Heat, Bureau
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Bureau forecast zone
- Reported by
- NEWSPAPER
- Coordinates
- 41.404, -89.529 (the zone’s center; the record gives no point)
Heat, Carroll
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Carroll forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 42.069, -89.934 (the zone’s center; the record gives no point)
Heat, Hancock
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Hancock forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 40.404, -91.165 (the zone’s center; the record gives no point)
Heat, Henderson
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Henderson forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 40.818, -90.925 (the zone’s center; the record gives no point)
Heat, Jo Daviess
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Jo Daviess forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 42.366, -90.212 (the zone’s center; the record gives no point)
Heat, McDonough
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- McDonough forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 40.456, -90.678 (the zone’s center; the record gives no point)
Heat, Mercer
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Mercer forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 41.205, -90.741 (the zone’s center; the record gives no point)
Heat, Putnam
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Putnam forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 41.205, -89.286 (the zone’s center; the record gives no point)
Heat, Rock Island
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Rock Island forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 41.467, -90.567 (the zone’s center; the record gives no point)
Heat, Stephenson
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Stephenson forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 42.352, -89.662 (the zone’s center; the record gives no point)
Heat, Warren
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Warren forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 40.849, -90.615 (the zone’s center; the record gives no point)
Heat, Whiteside
- When
- July 19, 4:00 AM CST to July 31, 8:00 PM CST
- Where
- Whiteside forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 41.756, -89.914 (the zone’s center; the record gives no point)
The people who died
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Heat, Henry | 1999-07-28 | 74 | Male | Permanent Home | Direct |
What these are
- Heat
- Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Nebraska, July 19 to 30, 1999
- Flooding in Iowa, July 19 to 26, 1999
- Tornadoes and Hail in Nebraska, July 19, 1999
- Flooding in Iowa, July 19 to 22, 1999
- Flash Flooding in Nebraska, July 19 to 20, 1999
- Damaging Wind in Alabama, July 19, 1999
- Lightning Strike in Florida, July 19, 1999
- Damaging Wind in Nebraska, July 19, 1999
- Lightning Strike in Colorado, July 19, 1999
- Heat in Iowa, July 19 to 31, 1999
- Hail in Nebraska, July 19, 1999
- Damaging Wind in Nebraska, July 19, 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: 5719652, 5719653, 5719654, 5719655, 5719656, 5719657, 5719658, 5719659, 5719660, 5719661, 5719662, 5719663, 5719664.