Jefferson County, Iowa weather alerts
No watches, warnings or advisories are in force for Jefferson County.
Checked Sun, Sep 20, 2026, 11:19 AM CDT. Times are Central Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Jefferson County, Iowa. 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 Jefferson 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 Jefferson County
In the past year the National Weather Service issued 116 alerts for Jefferson County, including 21 severe thunderstorm warnings, 6 tornado warnings, 3 extreme heat warnings and 3 red flag warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 21 | Sep 20, 2026 |
| Tornado Warning | 6 | Aug 13, 2026 |
| Extreme Heat Warning | 3 | Sep 2, 2026 |
| Red Flag Warning | 3 | Mar 28, 2026 |
| Flash Flood Warning | 2 | Aug 15, 2026 |
| Freeze Warning | 2 | Apr 20, 2026 |
| Blizzard Warning | 1 | Mar 15, 2026 |
| Extreme Cold Warning | 1 | Jan 23, 2026 |
| High Wind Warning | 1 | Mar 15, 2026 |
| Winter Storm Warning | 1 | Nov 28, 2025 |
| Tornado Watch | 11 | Jul 20, 2026 |
| Flood Watch | 8 | Sep 16, 2026 |
| Severe Thunderstorm Watch | 8 | Aug 13, 2026 |
| Extreme Heat Watch | 2 | Jul 26, 2026 |
| Fire Weather Watch | 2 | Feb 27, 2026 |
| Winter Storm Watch | 2 | Mar 15, 2026 |
| Extreme Cold Watch | 1 | Jan 23, 2026 |
| High Wind Watch | 1 | Mar 15, 2026 |
| Dense Fog Advisory | 14 | Sep 16, 2026 |
| Heat Advisory | 7 | Aug 31, 2026 |
| Wind Advisory | 7 | Apr 2, 2026 |
| Winter Weather Advisory | 6 | Mar 16, 2026 |
| Cold Weather Advisory | 4 | Jan 26, 2026 |
| Frost Advisory | 2 | May 2, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Extreme Heat 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
- Freeze Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Red Flag Warning
- High Wind Warning
- Blizzard Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Red Flag Warning
- Red Flag Warning
- Extreme Cold Warning
- Winter Storm Warning
- Freeze Warning
Every alert, most recent first
- Severe Thunderstorm Warning
- Flood Watch
- Dense Fog Advisory
- Dense Fog Advisory
- Extreme Heat Warning
- Heat Advisory
- Flash Flood Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Flood Watch
- Severe Thunderstorm Watch
- Dense Fog Advisory
- Heat Advisory
- Heat Advisory
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Dense Fog Advisory
- Flood Watch
- Extreme Heat Watch
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Tornado Watch
- Heat Advisory
- Heat Advisory
- Flood Watch
- Extreme Heat Warning
- Extreme Heat Watch
- Flood Watch
- Flood Watch
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Tornado Watch
- Severe Thunderstorm Warning
The 40 most recent of 116.
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 Jefferson 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.