Jefferson County, Pennsylvania weather alerts
No watches, warnings or advisories are in force for Jefferson County.
Checked Sun, Sep 20, 2026, 11:33 AM EDT. Times are Eastern Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Jefferson County, Pennsylvania. 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 177 alerts for Jefferson County, including 38 severe thunderstorm warnings, 17 flash flood warnings, 15 snow squall warnings and 8 flood warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 38 | Sep 12, 2026 |
| Flash Flood Warning | 17 | Sep 3, 2026 |
| Snow Squall Warning | 15 | Mar 17, 2026 |
| Flood Warning | 8 | Sep 12, 2026 |
| Freeze Warning | 7 | May 12, 2026 |
| Tornado Warning | 5 | Jul 21, 2026 |
| Extreme Cold Warning | 3 | Feb 7, 2026 |
| Extreme Heat Warning | 1 | Jun 30, 2026 |
| High Wind Warning | 1 | Mar 13, 2026 |
| Ice Storm Warning | 1 | Dec 26, 2025 |
| Winter Storm Warning | 1 | Jan 24, 2026 |
| Severe Thunderstorm Watch | 15 | Sep 9, 2026 |
| Flood Watch | 8 | Sep 12, 2026 |
| Freeze Watch | 5 | May 12, 2026 |
| Extreme Cold Watch | 2 | Feb 7, 2026 |
| Tornado Watch | 2 | Jun 14, 2026 |
| Winter Storm Watch | 2 | Jan 24, 2026 |
| Winter Weather Advisory | 14 | Mar 16, 2026 |
| Dense Fog Advisory | 12 | Aug 21, 2026 |
| Cold Weather Advisory | 8 | Feb 8, 2026 |
| Frost Advisory | 7 | May 11, 2026 |
| Wind Advisory | 3 | Mar 15, 2026 |
| Freezing Fog Advisory | 1 | Nov 19, 2025 |
| Heat Advisory | 1 | Jun 30, 2026 |
Warnings issued
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Tornado Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood 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
- Severe Thunderstorm Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
And 37 earlier warnings.
Every alert, most recent first
- Flood Warning
- Severe Thunderstorm Warning
- Flood Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flood Watch
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Watch
- Dense Fog Advisory
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Watch
- Tornado Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
The 40 most recent of 177.
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.