Weather alerts in Illinois, 2017
2,996 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 2,996
- Warnings
- 1,344
- Watches
- 228
- Advisories
- 600
- Busiest month
- July542 alerts
- Busiest day
- March 1, 201795 alerts
Over time
By month
The alerts
2,996 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.
- Rock Island County186
- LaSalle County180
- Kane County168
- Lake County166
- Iroquois County165
- Henry County157
- Whiteside County157
- McHenry County152
- Jackson County148
- Kendall County146
- Cook County146
- Will County143
- Bureau County142
- Ogle County142
- Mercer County140
- Crawford County140
- Boone County140
- Putnam County137
- Vermilion County137
- Grundy County137
- Winnebago County137
- DuPage County136
- DeKalb County135
- White County134
- Peoria County133
- Henderson County131
- Alexander County130
- Union County130
- Williamson County129
- Livingston County129
- Hamilton County128
- Massac County127
- Wabash County127
- Franklin County124
- Saline County124
- Lee County124
- Lawrence County123
- Fulton County123
- Johnson County122
- Pulaski County122
62 more counties
- Tazewell County121
- Jo Daviess County120
- Champaign County119
- Ford County119
- Pope County118
- Wayne County118
- Carroll County118
- Hancock County118
- Gallatin County117
- Pike County117
- Marshall County116
- Jasper County115
- Edwards County114
- Jefferson County114
- Macoupin County114
- McLean County113
- Woodford County113
- Perry County112
- Stephenson County112
- Warren County112
- Edgar County111
- Knox County111
- Richland County110
- Kankakee County110
- Madison County108
- Christian County107
- Clark County106
- Mason County106
- Sangamon County105
- Montgomery County105
- Clay County104
- Randolph County104
- Piatt County104
- Jersey County104
- McDonough County103
- Hardin County102
- Morgan County102
- Saint Clair County101
- Stark County99
- Coles County98
- Douglas County98
- Effingham County98
- Moultrie County98
- Fayette County98
- Menard County97
- Bond County97
- Calhoun County97
- Shelby County96
- Macon County95
- Monroe County94
- Washington County94
- Logan County94
- Clinton County93
- Cass County93
- Adams County93
- Cumberland County92
- Marion County91
- Greene County91
- DeWitt County89
- Brown County82
- Schuyler County81
- Scott County80
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.