Weather alerts in Illinois, 2011
3,325 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 3,325
- Warnings
- 1,877
- Watches
- 210
- Advisories
- 641
- Busiest month
- June701 alerts
- Busiest day
- May 25, 2011164 alerts
Over time
By month
The alerts
3,325 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.
- Pope County214
- LaSalle County208
- Saint Clair County204
- Alexander County203
- Massac County203
- Madison County200
- Pike County200
- Lake County199
- Monroe County196
- Iroquois County196
- Jackson County195
- Randolph County195
- Pulaski County194
- Union County194
- Wabash County193
- Calhoun County193
- White County192
- Kane County189
- Wayne County187
- Franklin County186
- Gallatin County184
- Johnson County184
- Jefferson County183
- Sangamon County182
- Perry County181
- Fayette County181
- Williamson County179
- Crawford County179
- Lawrence County178
- Hardin County177
- Jersey County177
- Morgan County175
- DeKalb County175
- Adams County174
- Clinton County173
- Kendall County171
- Macoupin County169
- Cook County169
- Hamilton County167
- DuPage County167
62 more counties
- Saline County166
- Edwards County165
- Bond County165
- Greene County164
- Marion County164
- Grundy County163
- Kankakee County163
- Jasper County162
- McHenry County162
- Washington County161
- Montgomery County160
- Christian County158
- Shelby County158
- Vermilion County157
- Clark County156
- Edgar County156
- Scott County154
- Lee County154
- Effingham County153
- Piatt County153
- Will County153
- Clay County152
- Ford County150
- Livingston County150
- Champaign County150
- Ogle County150
- Richland County149
- Tazewell County149
- Cass County148
- Cumberland County148
- McLean County148
- Coles County147
- Winnebago County146
- Macon County146
- Fulton County145
- Hancock County145
- Brown County144
- Logan County143
- Moultrie County143
- Mason County142
- Menard County142
- Douglas County140
- DeWitt County134
- Woodford County134
- Boone County134
- Bureau County133
- Henderson County133
- Schuyler County130
- Rock Island County129
- Peoria County128
- Whiteside County126
- Knox County124
- McDonough County124
- Mercer County123
- Henry County120
- Marshall County115
- Putnam County114
- Stark County110
- Warren County107
- Jo Daviess County105
- Stephenson County100
- Carroll County98
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.