Alert archive / Illinois / Severe Thunderstorm Watches / 2017
Severe Thunderstorm Watches in Illinois, September 2017
1 severe thunderstorm watches in September 2017. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in September 2017. Tap one for its archive.
- Severe Thunderstorm Watches
- 1
- Busiest day
- September 4, 20171 severe thunderstorm watches
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 29 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bond County1
- Calhoun County1
- Champaign County1
- Christian County1
- Clark County1
- Clay County1
- Clinton County1
- Coles County1
- Crawford County1
- Cumberland County1
- Douglas County1
- Edgar County1
- Effingham County1
- Fayette County1
- Greene County1
- Jasper County1
- Jersey County1
- Lawrence County1
- Macon County1
- Macoupin County1
- Madison County1
- Marion County1
- Monroe County1
- Montgomery County1
- Morgan County1
- Moultrie County1
- Piatt County1
- Randolph County1
- Richland County1
- Saint Clair County1
- Sangamon County1
- Scott County1
- Shelby County1
- Vermilion County1
- Washington County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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. Warning verification from the Mesonet's Cow. Rebuilt daily.