Alert archive / Illinois / Winter Weather Advisories
Winter Weather Advisories in Illinois, 2026
18 winter weather advisories in 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 winter weather advisories reaches back to 2005.
Winter Weather Advisories by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Winter Weather Advisories
- 18
- Busiest month
- January11 winter weather advisories
- Busiest day
- March 15, 20264 winter weather advisories
Over time
By month
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 |
|---|---|---|---|---|
| Jan 20, 2:45 AM CST | Winter Weather Advisory | DVN | Carroll, Jo Daviess, Stephenson | 23 hr |
| Jan 20, 4:00 AM CST | Winter Weather Advisory | LOT | Boone, Cook, DeKalb, DuPage, Kane, Lake and 3 more | 23 hr |
| Jan 21, 2:46 AM CST | Winter Weather Advisory | DVN | Carroll, Jo Daviess, Stephenson | 21 hr |
| Jan 21, 5:27 AM CST | Winter Weather Advisory | PAH | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 5 hr |
| Jan 23, 2:24 AM CST | Winter Weather Advisory | LSX | Adams, Brown | 55 hr |
| Jan 23, 2:27 AM CST | Winter Weather Advisory | ILX | Fulton, Knox, McLean, Marshall, Mason, Peoria and 4 more | 61 hr |
| Jan 23, 1:26 PM CST | Winter Weather Advisory | DVN | Hancock, Henderson, McDonough, Warren | 44 hr |
| Jan 24, 1:51 AM CST | Winter Weather Advisory | LOT | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 5 more | 42 hr |
| Jan 29, 1:29 PM CST | Winter Weather Advisory | LOT | Cook, DuPage, Lake | 30 hr |
| Jan 30, 3:02 AM CST | Winter Weather Advisory | LOT | Cook, Will | 33 hr |
| Jan 30, 1:42 PM CST | Winter Weather Advisory | LOT | Will | 22 hr |
| Feb 19, 2:49 AM CST | Winter Weather Advisory | DVN | Jo Daviess | 30 hr |
| Mar 1, 1:34 AM CST | Winter Weather Advisory | LSX | Adams, Calhoun, Greene, Jersey, Macoupin, Madison and 1 more | 23 hr |
| Mar 15, 9:27 AM CDT | Winter Weather Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 39 hr |
| Mar 15, 10:39 AM CDT | Winter Weather Advisory | ILX | Cass, Fulton, Knox, Logan, McLean, Marshall and 7 more | 37 hr |
| Mar 15, 1:18 PM CDT | Winter Weather Advisory | DVN | Hancock, McDonough | 24 hr |
| Mar 15, 2:37 PM CDT | Winter Weather Advisory | LSX | Adams, Brown, Pike | 16 hr |
| Mar 16, 1:05 PM CDT | Winter Weather Advisory | DVN | Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more | 11 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County5
- Jo Daviess County4
- DuPage County4
- Lake County4
- Will County4
- Carroll County3
- Stephenson County3
- Adams County3
- Hancock County3
- McDonough County3
- Boone County2
- DeKalb County2
- Kane County2
- McHenry County2
- Ogle County2
- Winnebago County2
- Brown County2
- Fulton County2
- Knox County2
- McLean County2
- Marshall County2
- Mason County2
- Peoria County2
- Schuyler County2
- Stark County2
- Tazewell County2
- Woodford County2
- Henderson County2
- Warren County2
- Ford County2
- Grundy County2
- Iroquois County2
- Kankakee County2
- Kendall County2
- LaSalle County2
- Livingston County2
- Pike County2
- Alexander County1
- Hardin County1
- Johnson County1
The busiest days
Days with the most alerts issued, by UTC date.
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.