Stephenson County, Illinois weather alerts
No watches, warnings or advisories are in force for Stephenson County.
Checked Sun, Sep 20, 2026, 1:31 PM CDT. Times are Central Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Stephenson 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 Stephenson 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 Stephenson County
In the past year the National Weather Service issued 114 alerts for Stephenson County, including 25 severe thunderstorm warnings, 9 tornado warnings, 4 flash flood warnings and 3 freeze warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 25 | Aug 21, 2026 |
| Tornado Warning | 9 | Jul 3, 2026 |
| Flash Flood Warning | 4 | Sep 19, 2026 |
| Freeze Warning | 3 | Apr 20, 2026 |
| Extreme Heat Warning | 2 | Jul 27, 2026 |
| Flood Warning | 2 | Apr 17, 2026 |
| High Wind Warning | 2 | Mar 15, 2026 |
| Blizzard Warning | 1 | Mar 15, 2026 |
| Extreme Cold Warning | 1 | Jan 22, 2026 |
| Red Flag Warning | 1 | Feb 18, 2026 |
| Winter Storm Warning | 1 | Nov 29, 2025 |
| Severe Thunderstorm Watch | 10 | Aug 21, 2026 |
| Tornado Watch | 6 | Jun 11, 2026 |
| Flood Watch | 5 | Sep 19, 2026 |
| Extreme Heat Watch | 2 | Jul 26, 2026 |
| Winter Storm Watch | 2 | Mar 15, 2026 |
| Extreme Cold Watch | 1 | Jan 23, 2026 |
| Fire Weather Watch | 1 | Feb 18, 2026 |
| Dense Fog Advisory | 11 | Aug 13, 2026 |
| Wind Advisory | 7 | Mar 12, 2026 |
| Winter Weather Advisory | 7 | Mar 16, 2026 |
| Cold Weather Advisory | 4 | Jan 26, 2026 |
| Frost Advisory | 4 | May 11, 2026 |
| Heat Advisory | 3 | Sep 1, 2026 |
Warnings issued
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Freeze Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Tornado Warning
- Flood Warning
- Tornado Warning
- Flash Flood Warning
- Tornado Warning
- Flash Flood Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- High Wind Warning
- Blizzard Warning
- High Wind Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Red Flag Warning
- Extreme Cold Warning
- Winter Storm Warning
- Freeze Warning
- Freeze Warning
Every alert, most recent first
- Flash Flood Warning
- Flood Watch
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Dense Fog Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Dense Fog Advisory
- Extreme Heat Warning
- Extreme Heat Watch
- Heat Advisory
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Extreme Heat Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flash Flood Warning
- Tornado Watch
- Tornado Watch
- Flood Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flood Watch
- Tornado Warning
- Severe Thunderstorm Watch
The 40 most recent of 114.
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 Stephenson 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.