Weather alerts in Illinois, 2018
3,121 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 3,121
- Warnings
- 1,258
- Watches
- 197
- Advisories
- 697
- Busiest month
- June728 alerts
- Busiest day
- June 21, 201895 alerts
Over time
By month
The alerts
3,121 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 County218
- Winnebago County182
- Lake County181
- Henry County180
- Whiteside County176
- Ogle County171
- Kane County167
- Mercer County157
- Alexander County152
- Jo Daviess County151
- Stephenson County150
- Massac County150
- LaSalle County148
- Lee County148
- Bureau County147
- Wabash County146
- Gallatin County146
- Henderson County145
- Carroll County144
- Boone County143
- White County141
- DuPage County140
- Putnam County139
- DeKalb County138
- Pulaski County138
- Union County137
- Hancock County136
- McHenry County136
- Pope County135
- Kendall County133
- Wayne County132
- McDonough County131
- Saline County125
- Iroquois County124
- Cook County124
- Crawford County122
- Madison County122
- Edwards County122
- Franklin County122
- Jackson County122
62 more counties
- Williamson County122
- Johnson County119
- Warren County118
- Fayette County117
- Hardin County116
- Peoria County113
- Tazewell County113
- Clay County112
- Champaign County111
- Fulton County111
- Lawrence County111
- Hamilton County111
- Grundy County110
- Shelby County110
- Richland County110
- Saint Clair County110
- Jasper County109
- Adams County109
- Ford County108
- Livingston County108
- Perry County108
- Effingham County107
- Knox County105
- McLean County105
- Mason County105
- Jefferson County105
- Montgomery County104
- Monroe County104
- Sangamon County103
- Vermilion County103
- Calhoun County103
- Jersey County103
- Kankakee County102
- Christian County102
- Pike County102
- Will County101
- Randolph County100
- Woodford County99
- Cass County98
- Marshall County98
- Marion County98
- Morgan County96
- Schuyler County96
- Stark County96
- Clinton County96
- Logan County95
- Macoupin County95
- DeWitt County94
- Bond County93
- Clark County91
- Macon County91
- Piatt County91
- Coles County90
- Menard County90
- Greene County90
- Cumberland County89
- Moultrie County89
- Washington County83
- Douglas County81
- Scott County81
- Brown County76
- Edgar County75
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.