Alert archive / Illinois / Williamson County
Weather alerts in Williamson County, Illinois, 1999
24 weather alerts in 1999, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Williamson County and its neighbors
Each county as a circle sized by its count in 1999. Tap one for its archive.
- Alerts
- 24
- Warnings
- 9
- Watches
- 15
- Advisories
- 0
- Busiest month
- January7 alerts
- Busiest day
- January 22, 19996 alerts
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 21, 4:30 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 21, 7:37 PM CST | Tornado Warning | PAH | 48 min |
| Jan 21, 8:25 PM CST | Flash Flood Warning | PAH | 9 hr |
| Jan 21, 9:44 PM CST | Tornado Warning | PAH | 31 min |
| Jan 21, 10:00 PM CST | Tornado Watch | SPC | 5 hr |
| Jan 22, 12:05 AM CST | Severe Thunderstorm Warning | PAH | 55 min |
| Jan 22, 5:25 AM CST | Flash Flood Warning | PAH | 6 hr |
| Feb 11, 2:30 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 11, 5:18 PM CST | Severe Thunderstorm Warning | PAH | 42 min |
| Feb 27, 12:15 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 3, 1:30 PM CST | Tornado Watch | SPC | 6 hr |
| Apr 3, 7:00 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 5, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 10, 7:30 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 2:30 PM CDT | Tornado Watch | SPC | 7 hr |
| May 5, 2:25 PM CDT | Severe Thunderstorm Warning | PAH | 35 min |
| May 5, 2:39 PM CDT | Tornado Warning | PAH | 51 min |
| May 5, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
| May 17, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 17, 3:27 PM CDT | Severe Thunderstorm Warning | PAH | 63 min |
| Jun 1, 5:30 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 4, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 27, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 13, 12:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 4 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 9 |
| Flooding | |
| Flash Flood Warning | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive19982000
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.