Alert archive / Illinois / Winter Storm Warnings
Winter Storm Warnings in Illinois, 2020
10 winter storm warnings in 2020. 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 winter storm warnings reaches back to 2005.
Winter Storm Warnings by county
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Winter Storm Warnings
- 10
- Busiest month
- January4 winter storm warnings
- Busiest day
- January 10, 20203 winter storm warnings
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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 3:17 AM CST | Winter Storm Warning | DVN | Carroll, Hancock, Henderson, Henry, Jo Daviess, Mercer and 3 more | 43 hr |
| Jan 10, 3:58 AM CST | Winter Storm Warning | LSX | Adams | 40 hr |
| Jan 10, 4:03 AM CST | Winter Storm Warning | LOT | Boone, DeKalb, Lee, McHenry, Ogle, Winnebago | 44 hr |
| Jan 16, 2:17 PM CST | Winter Storm Warning | DVN | Bureau, Carroll, Henry, Mercer, Putnam, Rock Island and 1 more | 52 hr |
| Feb 4, 2:46 PM CST | Winter Storm Warning | LSX | Bond, Calhoun, Greene, Jersey, Macoupin, Madison and 4 more | 24 hr |
| Apr 16, 2:12 AM CDT | Winter Storm Warning | DVN | Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more | 29 hr |
| Apr 16, 3:31 AM CDT | Winter Storm Warning | ILX | Fulton, Knox, Marshall, Peoria, Stark, Woodford | 30 hr |
| Dec 12, 1:53 AM CST | Winter Storm Warning | DVN | Jo Daviess | 12 hr |
| Dec 28, 3:04 PM CST | Winter Storm Warning | LOT | Boone, Cook, DeKalb, Kane, Lake, Lee and 3 more | 42 hr |
| Dec 28, 3:15 PM CST | Winter Storm Warning | DVN | Bureau, Carroll, Henderson, Henry, Jo Daviess, Mercer and 5 more | 38 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Henry County4
- Mercer County4
- Rock Island County4
- Carroll County3
- Henderson County3
- Jo Daviess County3
- Whiteside County3
- Bureau County3
- Putnam County3
- Hancock County2
- Stephenson County2
- Boone County2
- DeKalb County2
- Lee County2
- McHenry County2
- Ogle County2
- Winnebago County2
- Warren County2
- Adams County1
- Bond County1
- Calhoun County1
- Greene County1
- Jersey County1
- Macoupin County1
- Madison County1
- Monroe County1
- Montgomery County1
- Pike County1
- Saint Clair County1
- McDonough County1
- Fulton County1
- Knox County1
- Marshall County1
- Peoria County1
- Stark County1
- Woodford County1
- Cook County1
- Kane County1
- Lake County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.