Knox County, Illinois weather alerts
No watches, warnings or advisories are in force for Knox County.
Checked Sun, Sep 20, 2026, 5:23 PM CDT. Times are Central Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Knox County, Illinois. Open it for the live map, where it pans and zooms.























Open the live map with warnings and watches
Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
Nothing is in force for Knox County right now. Its warnings come from the National Weather Service and appear here within a minute of being issued; every one of the past year is below.
The past year in Knox County
In the past year the National Weather Service issued 134 alerts for Knox County, including 26 severe thunderstorm warnings, 7 tornado warnings, 6 flash flood warnings and 5 flood warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 26 | Aug 12, 2026 |
| Tornado Warning | 7 | Aug 9, 2026 |
| Flash Flood Warning | 6 | Aug 19, 2026 |
| Flood Warning | 5 | Aug 15, 2026 |
| Extreme Heat Warning | 3 | Sep 2, 2026 |
| Freeze Warning | 2 | Apr 20, 2026 |
| Red Flag Warning | 2 | Feb 27, 2026 |
| Blizzard Warning | 1 | Mar 15, 2026 |
| Extreme Cold Warning | 1 | Jan 23, 2026 |
| Winter Storm Warning | 1 | Nov 29, 2025 |
| Flood Watch | 12 | Sep 16, 2026 |
| Tornado Watch | 8 | Jun 17, 2026 |
| Severe Thunderstorm Watch | 7 | Aug 21, 2026 |
| Fire Weather Watch | 2 | Feb 27, 2026 |
| Freeze Watch | 2 | Apr 20, 2026 |
| Extreme Cold Watch | 1 | Jan 23, 2026 |
| Winter Storm Watch | 1 | Nov 29, 2025 |
| Dense Fog Advisory | 14 | Sep 11, 2026 |
| Wind Advisory | 9 | Apr 2, 2026 |
| Winter Weather Advisory | 6 | Mar 16, 2026 |
| Heat Advisory | 5 | Aug 31, 2026 |
| Cold Weather Advisory | 4 | Jan 26, 2026 |
| Flood Advisory | 4 | Aug 12, 2026 |
| Blowing Dust Advisory | 3 | May 12, 2026 |
| Frost Advisory | 2 | Apr 19, 2026 |
Warnings issued
- Extreme Heat Warning
- Flash Flood Warning
- Flood Warning
- Flash Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Flood Warning
- Flood Warning
- Severe Thunderstorm Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Freeze Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Blizzard Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Red Flag Warning
- Red Flag Warning
- Extreme Cold Warning
- Winter Storm Warning
- Freeze Warning
Every alert, most recent first
- Flood Watch
- Dense Fog Advisory
- Extreme Heat Warning
- Heat Advisory
- Severe Thunderstorm Watch
- Flash Flood Warning
- Flood Watch
- Flood Watch
- Flood Warning
- Flash Flood Warning
- Flood Watch
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Watch
- Dense Fog Advisory
- Flood Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Tornado Warning
- Severe Thunderstorm Watch
- Heat Advisory
- Extreme Heat Warning
- Heat Advisory
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Flood Advisory
- Extreme Heat Warning
- Heat Advisory
- Heat Advisory
- Flood Warning
- Flood Watch
- Flood Warning
- Flood Advisory
- Severe Thunderstorm Warning
- Tornado Watch
- Flood Watch
- Flood Warning
- Severe Thunderstorm Warning
The 40 most recent of 134.
From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.
Nearby
The counties around Knox County, with what is in force in each.
What this means
- Warning
- The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
- Watch
- Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
- Advisory
- A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
- Statement
- Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.
Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.
Sources
Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.