Alert archive / Illinois / Frost Advisories / 2021
Frost Advisories in Illinois, April 2021
10 frost advisories in April 2021. 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 2021. Tap one for its archive.
- Frost Advisories
- 10
- Busiest day
- April 14, 20213 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 2, 2:15 PM CDT | Frost Advisory | PAH | Alexander, Franklin, Jackson, Jefferson, Johnson, Massac and 4 more | 19 hr |
| Apr 2, 2:44 PM CDT | Frost Advisory | LSX | Randolph | 18 hr |
| Apr 13, 2:47 PM CDT | Frost Advisory | DVN | Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 3 more | 17 hr |
| Apr 13, 2:59 PM CDT | Frost Advisory | ILX | Fulton, Knox, Marshall, Peoria, Stark | 17 hr |
| Apr 14, 2:32 PM CDT | Frost Advisory | LSX | Adams, Brown, Calhoun, Greene, Pike | 17 hr |
| Apr 14, 2:36 PM CDT | Frost Advisory | ILX | Cass, Champaign, DeWitt, Fulton, Knox, Logan and 15 more | 17 hr |
| Apr 14, 2:45 PM CDT | Frost Advisory | DVN | Hancock, Henderson, McDonough, Mercer, Warren | 17 hr |
| Apr 19, 11:47 PM CDT | Frost Advisory | DVN | Carroll, Jo Daviess, Stephenson | 8 hr |
| Apr 21, 4:00 AM CDT | Frost Advisory | PAH | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more | 28 hr |
| Apr 24, 2:25 PM CDT | Frost Advisory | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 18 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alexander County2
- Franklin County2
- Jackson County2
- Jefferson County2
- Johnson County2
- Massac County2
- Perry County2
- Pulaski County2
- Union County2
- Williamson County2
- Hancock County2
- Henderson County2
- McDonough County2
- Mercer County2
- Warren County2
- Fulton County2
- Knox County2
- Marshall County2
- Peoria County2
- Stark County2
- Carroll County2
- Jo Daviess County2
- Stephenson County2
- Randolph County1
- Bureau County1
- Henry County1
- Putnam County1
- Rock Island County1
- Adams County1
- Brown County1
- Calhoun County1
- Greene County1
- Pike County1
- Cass County1
- Champaign County1
- DeWitt County1
- Logan County1
- McLean County1
- Macon County1
- Mason County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.