Alert archive / Illinois / Frost Advisories / 2026
Frost Advisories in Illinois, April 2026
4 frost advisories in April 2026. 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 in April 2026. Tap one for its archive.
- Frost Advisories
- 4
- Busiest day
- April 18, 20262 frost advisories
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 1:29 PM CDT | Frost Advisory | LOT | Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more | 20 hr |
| Apr 18, 1:48 PM CDT | Frost Advisory | ILX | Cass, Champaign, Christian, Clark, Clay, Coles and 29 more | 18 hr |
| Apr 19, 1:28 AM CDT | Frost Advisory | ILX | Cass, Christian, Clark, Clay, Coles, Crawford and 13 more | 31 hr |
| Apr 19, 2:40 PM CDT | Frost Advisory | LOT | Cook | 17 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cass County2
- Christian County2
- Clark County2
- Clay County2
- Coles County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Jasper County2
- Lawrence County2
- Macon County2
- Menard County2
- Morgan County2
- Moultrie County2
- Richland County2
- Sangamon County2
- Schuyler County2
- Scott County2
- Shelby County2
- Boone County1
- DeKalb County1
- DuPage County1
- Ford County1
- Grundy County1
- Iroquois County1
- Kane County1
- Kankakee County1
- Kendall County1
- Lake County1
- LaSalle County1
- Lee County1
- Livingston County1
- McHenry County1
- Ogle County1
- Will County1
- Winnebago County1
- Champaign County1
- DeWitt County1
- Douglas County1
- Edgar County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.