Frost Advisory
FROST ADVISORY REMAINS IN EFFECT FROM 5 AM TO 8 AM CDT SATURDAY
Take steps now to protect tender plants from the cold.
LaSalle County, Illinois: tornado and severe weather warnings
A frost advisory is in effect for LaSalle County as of 4:21 PM CDT.
Open the live map on LaSalle County Get a message when a warning reaches your address
The map shows radar, every warning shape, and the path and arrival time of each storm cell headed toward the center of LaSalle County. Tap your own street on it for times that apply to you.
The last 12 months in LaSalle County
- 10 tornado warnings
- 34 severe thunderstorm warnings
- 8 flash flood warnings
- 6 tornado watches
- 13 severe thunderstorm watches
The most recent tornado warning that included LaSalle County was issued Aug 12, 2026 by the Weather Service office in Chicago, IL.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Sep 20, 2026 | 2:12 AM CDT | Flash flood warning | LOT | text |
| Sep 17, 2026 | 7:07 AM CDT | Flash flood warning | LOT | text |
| Aug 21, 2026 | 9:10 PM CDT | Severe thunderstorm warning | LOT | text |
| Aug 21, 2026 | 8:19 PM CDT | Flash flood warning | LOT | text |
| Aug 21, 2026 | 7:20 PM CDT | Severe thunderstorm warning | LOT | text |
| Aug 21, 2026 | 6:29 PM CDT | Severe thunderstorm warning | LOT | text |
| Aug 21, 2026 | 5:44 PM CDT | Severe thunderstorm warning | LOT | text |
| Aug 12, 2026 | 9:37 AM CDT | Flash flood warning | LOT | text |
| Aug 12, 2026 | 8:37 AM CDT | Tornado warning | LOT | text |
| Aug 12, 2026 | 8:23 AM CDT | Severe thunderstorm warning | LOT | text |
| Aug 11, 2026 | 9:48 AM CDT | Severe thunderstorm warning | LOT | text |
| Aug 11, 2026 | 9:22 AM CDT | Severe thunderstorm warning | LOT | text |
A warning counts here if the Weather Service listed LaSalle County in it, even if the warned area covered only part of the county.
Nearby
- Putnam County, IL
- Grundy County, IL
- Kendall County, IL
- Marshall County, IL
- Bureau County, IL
- Lee County, IL
- Livingston County, IL
- DeKalb County, IL
- All of Illinois
What the alerts mean
Alerts come from the National Weather Service and refresh every minute. Past warnings come from the Iowa Environmental Mesonet's archive of Weather Service products. During a warning, also listen to local radio, TV or a weather radio.