Snow Advisories in Illinois
66 snow advisories since 1986. 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 snow advisories reaches back to 2005.
Snow Advisories by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Snow Advisories
- 66
- Busiest year
- 200735 snow advisories
- Average year
- 17over 4 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lee County18
- Ogle County18
- Boone County17
- DeKalb County17
- Lake County17
- McHenry County17
- Winnebago County17
- Kane County16
- Carroll County15
- Jo Daviess County14
- LaSalle County14
- Rock Island County14
- Stephenson County14
- Whiteside County14
- DuPage County13
- Grundy County13
- Kendall County13
- Bureau County11
- Henry County11
- Kankakee County11
- Putnam County11
- Livingston County10
- Ford County9
- Hancock County9
- Henderson County9
- Iroquois County9
- McDonough County9
- Warren County9
- Adams County8
- Brown County8
- DeWitt County8
- Logan County8
- McLean County8
- Menard County8
- Mercer County8
- Cass County7
- Fulton County7
- Knox County7
- Marshall County7
- Mason County7
60 more counties
- Peoria County7
- Sangamon County7
- Schuyler County7
- Stark County7
- Tazewell County7
- Woodford County7
- Champaign County6
- Christian County6
- Douglas County6
- Edwards County6
- Gallatin County6
- Macon County6
- Morgan County6
- Piatt County6
- Pike County6
- Scott County6
- Vermilion County6
- Wabash County6
- Clark County5
- Edgar County5
- Franklin County5
- Hamilton County5
- Jefferson County5
- Moultrie County5
- Saline County5
- Shelby County5
- Wayne County5
- White County5
- Alexander County4
- Calhoun County4
- Clay County4
- Coles County4
- Crawford County4
- Cumberland County4
- Greene County4
- Jackson County4
- Jasper County4
- Johnson County4
- Lawrence County4
- Massac County4
- Perry County4
- Pulaski County4
- Richland County4
- Union County4
- Williamson County4
- Effingham County3
- Hardin County3
- Jersey County3
- Macoupin County3
- Marion County3
- Montgomery County3
- Pope County3
- Bond County2
- Clinton County2
- Fayette County2
- Madison County2
- Monroe County2
- Randolph County2
- Saint Clair County2
- Washington County2
Nearby
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.