Weather alerts in Illinois, 2021
2,404 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 2,404
- Warnings
- 1,010
- Watches
- 138
- Advisories
- 585
- Busiest month
- August436 alerts
- Busiest day
- June 26, 202189 alerts
Over time
By month
The alerts
2,404 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County182
- Will County180
- McLean County147
- Grundy County145
- Sangamon County143
- Kankakee County139
- LaSalle County139
- Calhoun County138
- Morgan County138
- Iroquois County137
- Bureau County133
- Pike County132
- DuPage County129
- Jackson County126
- Ford County125
- Cass County122
- Greene County122
- Logan County122
- Henderson County122
- Putnam County122
- Kendall County122
- Livingston County122
- Piatt County121
- Hancock County121
- Henry County121
- Kane County121
- Champaign County120
- Jersey County120
- McDonough County119
- Lake County119
- Alexander County119
- DeWitt County118
- DeKalb County117
- Mason County116
- Tazewell County115
- Williamson County115
- Menard County114
- Scott County114
- Hamilton County113
- Macon County113
62 more counties
- Madison County113
- Vermilion County113
- Franklin County112
- Rock Island County112
- Union County112
- Warren County111
- Fulton County111
- Whiteside County111
- White County110
- Saint Clair County109
- Shelby County109
- Coles County108
- Carroll County108
- Jo Daviess County108
- Lee County108
- Pulaski County108
- Jefferson County106
- Adams County106
- Brown County105
- Moultrie County105
- Massac County105
- Christian County104
- Douglas County104
- Macoupin County103
- Mercer County103
- Woodford County103
- Johnson County103
- Pope County103
- Saline County103
- Schuyler County102
- Boone County102
- Perry County101
- Knox County101
- Peoria County101
- Clay County100
- Wayne County100
- Stephenson County100
- McHenry County100
- Ogle County100
- Montgomery County98
- Crawford County97
- Gallatin County96
- Winnebago County96
- Edwards County95
- Randolph County94
- Marshall County93
- Bond County91
- Wabash County91
- Edgar County90
- Clark County89
- Lawrence County89
- Clinton County88
- Fayette County88
- Monroe County88
- Richland County88
- Washington County88
- Stark County88
- Cumberland County86
- Hardin County86
- Effingham County82
- Marion County81
- Jasper County76
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.