Frost Advisories in Illinois
398 frost 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 frost advisories reaches back to 2005.
Frost Advisories by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Frost Advisories
- 398
- Busiest year
- 201132 frost advisories
- Average year
- 18over 22 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.
- Winnebago County71
- Boone County68
- Ogle County67
- McHenry County67
- DeKalb County66
- Jo Daviess County63
- Stephenson County63
- Pope County62
- Kane County62
- Johnson County61
- Lee County61
- Carroll County60
- Hardin County60
- Gallatin County58
- Edwards County57
- Hamilton County57
- Massac County57
- Wabash County57
- Wayne County57
- White County57
- Jefferson County56
- Union County56
- Franklin County55
- Williamson County55
- Saline County54
- Bureau County54
- Putnam County54
- Whiteside County53
- Lake County53
- Champaign County52
- Jackson County52
- Pulaski County52
- Vermilion County52
- Kankakee County52
- Alexander County51
- Henry County51
- Perry County50
- Grundy County50
- Rock Island County50
- DuPage County49
62 more counties
- LaSalle County49
- Piatt County48
- Kendall County48
- Coles County47
- Crawford County47
- Effingham County47
- Jasper County46
- Lawrence County46
- Richland County46
- DeWitt County46
- Iroquois County46
- Marshall County46
- Clark County45
- Clay County45
- Douglas County45
- Edgar County45
- Mercer County45
- Cumberland County44
- Woodford County44
- Shelby County43
- Ford County43
- Sangamon County43
- Moultrie County42
- Randolph County42
- Knox County42
- McLean County42
- Stark County42
- Logan County42
- Macon County42
- Livingston County41
- Peoria County41
- Tazewell County41
- Monroe County40
- Saint Clair County40
- Macoupin County39
- Calhoun County38
- Jersey County38
- Marion County38
- Washington County38
- Christian County38
- Menard County38
- Morgan County38
- Scott County38
- Bond County37
- Greene County37
- Madison County37
- Montgomery County37
- Cass County37
- Clinton County36
- Fayette County36
- Fulton County36
- Mason County36
- Warren County34
- Schuyler County34
- Henderson County33
- McDonough County33
- Pike County33
- Adams County31
- Brown County31
- Hancock County29
- Cook County20
- Will County19
The latest frost advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 11:57 AM CDT | Frost Advisory | DVN | Jo Daviess, Stephenson | 19 hr |
| May 6, 1:23 PM CDT | Frost Advisory | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more | 19 hr |
| May 6, 1:17 PM CDT | Frost Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Putnam, Rock Island and 2 more | 19 hr |
| May 1, 3:32 AM CDT | Frost Advisory | LOT | Boone, Cook, DeKalb, DuPage, Grundy, Iroquois and 10 more | 28 hr |
| May 1, 2:16 AM CDT | Frost Advisory | DVN | Bureau, Carroll, Henry, Jo Daviess, Mercer, Putnam and 3 more | 30 hr |
| Apr 19, 2:40 PM CDT | Frost Advisory | LOT | Cook | 17 hr |
| Apr 19, 1:28 AM CDT | Frost Advisory | ILX | Cass, Christian, Clark, Clay, Coles, Crawford and 13 more | 31 hr |
| Apr 18, 1:48 PM CDT | Frost Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 18 hr |
| Apr 18, 1:29 PM CDT | Frost Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more | 20 hr |
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.