Alert archive / Illinois / Severe Thunderstorm Watches / 2020
Severe Thunderstorm Watches in Illinois, April 2020
5 severe thunderstorm watches in April 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 severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in April 2020. Tap one for its archive.
- Severe Thunderstorm Watches
- 5
- Busiest day
- April 7, 20202 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 |
|---|---|---|---|---|
| Apr 7, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Lake, McHenry | 5 hr |
| Apr 7, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 11 more | 6 hr |
| Apr 8, 3:08 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 58 more | 6 hr |
| Apr 28, 3:51 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 37 more | 7 hr |
| Apr 28, 7:35 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Jackson, Jefferson, Johnson, Massac and 4 more | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lake County2
- McHenry County2
- Adams County2
- Bond County2
- Brown County2
- Calhoun County2
- Cass County2
- Christian County2
- Clinton County2
- Coles County2
- Cumberland County2
- DeWitt County2
- Douglas County2
- Effingham County2
- Fayette County2
- Fulton County2
- Greene County2
- Jersey County2
- Knox County2
- Logan County2
- McLean County2
- Macon County2
- Macoupin County2
- Madison County2
- Marion County2
- Marshall County2
- Mason County2
- Menard County2
- Monroe County2
- Montgomery County2
- Morgan County2
- Moultrie County2
- Peoria County2
- Piatt County2
- Pike County2
- Saint Clair County2
- Sangamon County2
- Schuyler County2
- Scott County2
- Shelby County2
52 more counties
- Stark County2
- Tazewell County2
- Washington County2
- Woodford County2
- Boone County1
- Carroll County1
- Cook County1
- DeKalb County1
- DuPage County1
- Jo Daviess County1
- Kane County1
- Kendall County1
- Lee County1
- Ogle County1
- Rock Island County1
- Stephenson County1
- Whiteside County1
- Will County1
- Winnebago County1
- Bureau County1
- Champaign County1
- Clark County1
- Clay County1
- Crawford County1
- Edgar County1
- Ford County1
- Grundy County1
- Hancock County1
- Henderson County1
- Henry County1
- Iroquois County1
- Jasper County1
- LaSalle County1
- Lawrence County1
- Livingston County1
- McDonough County1
- Mercer County1
- Putnam County1
- Richland County1
- Vermilion County1
- Warren County1
- Randolph County1
- Alexander County1
- Franklin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pulaski County1
- Union County1
- Williamson County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.