Lyman County, South Dakota weather alerts
No watches, warnings or advisories are in force for Lyman County.
Checked Sun, Sep 20, 2026, 9:31 AM CDT. Times are Central Daylight Time.
Radar
Reflectivity now over Lyman County, South Dakota. Open it to see warnings and watches on the map.























Radar mosaic and map layers from NOAA MRMS. Boundaries from the Iowa Environmental Mesonet.
Alerts in force
Nothing is in force for Lyman 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 Lyman County
In the past year the National Weather Service issued 133 alerts for Lyman County, including 34 severe thunderstorm warnings, 14 red flag warnings, 7 high wind warnings and 3 flood warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 34 | Sep 4, 2026 |
| Red Flag Warning | 14 | Sep 11, 2026 |
| High Wind Warning | 7 | Mar 12, 2026 |
| Flood Warning | 3 | Jul 30, 2026 |
| Blizzard Warning | 1 | Mar 15, 2026 |
| Extreme Heat Warning | 1 | Jul 25, 2026 |
| Flash Flood Warning | 1 | Jul 30, 2026 |
| Severe Thunderstorm Watch | 12 | Aug 24, 2026 |
| Fire Weather Watch | 6 | May 15, 2026 |
| High Wind Watch | 5 | Mar 12, 2026 |
| Tornado Watch | 3 | Jun 27, 2026 |
| Winter Storm Watch | 1 | Mar 14, 2026 |
| Wind Advisory | 13 | Jun 27, 2026 |
| Winter Weather Advisory | 11 | Apr 3, 2026 |
| Dense Fog Advisory | 10 | Sep 19, 2026 |
| Heat Advisory | 5 | Jul 29, 2026 |
| Cold Weather Advisory | 4 | Jan 26, 2026 |
| Frost Advisory | 2 | May 20, 2026 |
Warnings issued
- Red Flag Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flash Flood Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- 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
- 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
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Blizzard Warning
- High Wind Warning
- Red Flag Warning
- Red Flag Warning
- High Wind Warning
- Red Flag Warning
- High Wind Warning
- High Wind Warning
- High Wind Warning
- High Wind Warning
- High Wind Warning
And 1 earlier warnings.
Every alert, most recent first
- Dense Fog Advisory
- Dense Fog Advisory
- Red Flag Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Flood Warning
- Flash Flood Warning
- Severe Thunderstorm Watch
- Heat Advisory
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Heat Advisory
- Heat Advisory
- Heat Advisory
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
The 40 most recent of 133.
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 Lyman 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.