Mercer County, Pennsylvania weather alerts
No watches, warnings or advisories are in force for Mercer County.
Checked Mon, Sep 21, 2026, 3:55 PM EDT. Times are Eastern Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Mercer 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 Mercer 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 Mercer County
In the past year the National Weather Service issued 153 alerts for Mercer County, including 46 severe thunderstorm warnings, 14 snow squall warnings, 8 flash flood warnings and 6 freeze warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 46 | Sep 13, 2026 |
| Snow Squall Warning | 14 | Mar 17, 2026 |
| Flash Flood Warning | 8 | Sep 13, 2026 |
| Freeze Warning | 6 | May 12, 2026 |
| Lake Effect Snow Warning | 3 | Dec 13, 2025 |
| Extreme Cold Warning | 2 | Feb 7, 2026 |
| Flood Warning | 2 | Apr 1, 2026 |
| Tornado Warning | 2 | Sep 3, 2026 |
| Extreme Heat Warning | 1 | Jun 30, 2026 |
| High Wind Warning | 1 | Mar 13, 2026 |
| Winter Storm Warning | 1 | Jan 24, 2026 |
| Severe Thunderstorm Watch | 14 | Sep 9, 2026 |
| Flood Watch | 6 | Sep 12, 2026 |
| Freeze Watch | 5 | May 12, 2026 |
| Extreme Cold Watch | 2 | Feb 7, 2026 |
| Tornado Watch | 2 | Mar 26, 2026 |
| Winter Storm Watch | 1 | Jan 24, 2026 |
| Winter Weather Advisory | 12 | Mar 16, 2026 |
| Cold Weather Advisory | 7 | Feb 8, 2026 |
| Dense Fog Advisory | 7 | May 25, 2026 |
| Frost Advisory | 5 | May 11, 2026 |
| Wind Advisory | 3 | Mar 15, 2026 |
| Heat Advisory | 2 | Jul 15, 2026 |
| Freezing Fog Advisory | 1 | Nov 19, 2025 |
Warnings issued
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado 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
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Flash Flood 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
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Freeze Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Freeze Warning
- Freeze Warning
- Freeze Warning
- Freeze Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
And 26 earlier warnings.
Every alert, most recent first
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flood Watch
- Severe Thunderstorm Watch
- Flash Flood Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Flood Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flash Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Heat Advisory
- Severe Thunderstorm Warning
- Flash Flood Warning
- Flood Watch
- Flood Watch
- Flood Watch
The 40 most recent of 153.
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 Mercer 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.