Sierra County, California weather alerts
No watches, warnings or advisories are in force for Sierra County.
Checked Sun, Sep 20, 2026, 10:43 PM PDT. Times are Pacific Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Sierra County, California. 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 Sierra 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 Sierra County
In the past year the National Weather Service issued 52 alerts for Sierra County, including 5 severe thunderstorm warnings, 3 winter storm warnings, 1 freeze warning and 1 high wind warning.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 5 | Jun 19, 2026 |
| Winter Storm Warning | 3 | Apr 21, 2026 |
| Freeze Warning | 1 | Apr 16, 2026 |
| High Wind Warning | 1 | Apr 1, 2026 |
| Winter Storm Watch | 5 | Apr 21, 2026 |
| Flood Watch | 3 | Jan 3, 2026 |
| Fire Weather Watch | 2 | Aug 13, 2026 |
| Extreme Heat Watch | 1 | Aug 6, 2026 |
| Freeze Watch | 1 | Apr 16, 2026 |
| High Wind Watch | 1 | Apr 1, 2026 |
| Lake Wind Advisory | 11 | Sep 11, 2026 |
| Wind Advisory | 7 | Sep 12, 2026 |
| Winter Weather Advisory | 6 | Apr 11, 2026 |
| Flood Advisory | 3 | Jul 13, 2026 |
| Heat Advisory | 2 | Aug 7, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Winter Storm Warning
- Freeze Warning
- Severe Thunderstorm Warning
- High Wind Warning
- Winter Storm Warning
- Severe Thunderstorm Warning
- Winter Storm Warning
Every alert, most recent first
- Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Fire Weather Watch
- Fire Weather Watch
- Heat Advisory
- Extreme Heat Watch
- Heat Advisory
- Flood Advisory
- Lake Wind Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Lake Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Lake Wind Advisory
- Severe Thunderstorm Warning
- Winter Storm Warning
- Winter Storm Watch
- Lake Wind Advisory
- Freeze Watch
- Freeze Warning
- Winter Weather Advisory
- Winter Storm Watch
- Severe Thunderstorm Warning
- High Wind Watch
- High Wind Warning
- Winter Weather Advisory
- Winter Storm Watch
- Winter Storm Warning
- Winter Weather Advisory
- Winter Weather Advisory
- Flood Watch
- Winter Weather Advisory
- Severe Thunderstorm Warning
- Flood Advisory
- Flood Watch
The 40 most recent of 52.
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 Sierra 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.