Day County, South Dakota weather alerts
No watches, warnings or advisories are in force for Day County.
Checked Mon, Sep 21, 2026, 2:13 AM CDT. Times are Central Daylight Time.
Warnings on the map
Every watch, warning and advisory the National Weather Service has in force over Day County, South Dakota. 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 Day 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 Day County
In the past year the National Weather Service issued 125 alerts for Day County, including 23 severe thunderstorm warnings, 8 red flag warnings, 6 flood warnings and 5 blizzard warnings.
| Product | Issued | Most recent |
|---|---|---|
| Severe Thunderstorm Warning | 23 | Aug 30, 2026 |
| Red Flag Warning | 8 | May 15, 2026 |
| Flood Warning | 6 | Jul 31, 2026 |
| Blizzard Warning | 5 | Mar 15, 2026 |
| High Wind Warning | 4 | Jun 29, 2026 |
| Tornado Warning | 4 | Jun 29, 2026 |
| Flash Flood Warning | 3 | Jul 30, 2026 |
| Winter Storm Warning | 3 | Apr 3, 2026 |
| Extreme Cold Warning | 1 | Jan 22, 2026 |
| Extreme Heat Warning | 1 | Jul 25, 2026 |
| Freeze Warning | 1 | May 20, 2026 |
| Severe Thunderstorm Watch | 8 | Aug 24, 2026 |
| Fire Weather Watch | 3 | May 15, 2026 |
| Winter Storm Watch | 3 | Apr 3, 2026 |
| Extreme Cold Watch | 1 | Jan 22, 2026 |
| Flood Watch | 1 | Jul 8, 2026 |
| Tornado Watch | 1 | Jun 3, 2026 |
| Winter Weather Advisory | 16 | Apr 1, 2026 |
| Dense Fog Advisory | 12 | Sep 19, 2026 |
| Wind Advisory | 10 | Jun 29, 2026 |
| Cold Weather Advisory | 5 | Jan 25, 2026 |
| Heat Advisory | 4 | Jul 29, 2026 |
| Frost Advisory | 2 | May 11, 2026 |
Warnings issued
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Warning
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flood Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- High Wind Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Tornado Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Tornado Warning
- Severe Thunderstorm Warning
- Freeze Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Red Flag Warning
- Winter Storm Warning
- Red Flag Warning
- Blizzard Warning
- Winter Storm Warning
- High Wind Warning
- Blizzard Warning
- Extreme Cold Warning
- Blizzard Warning
- Blizzard Warning
- High Wind Warning
- High Wind Warning
- Blizzard Warning
- Winter Storm Warning
Every alert, most recent first
- Dense Fog Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Flood Warning
- Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flash Flood Warning
- Flood Warning
- Heat Advisory
- Extreme Heat Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Heat Advisory
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Heat Advisory
- Heat Advisory
- Flood Warning
- Flood Warning
- Flood Warning
- Severe Thunderstorm Warning
- Flood Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Severe Thunderstorm Warning
- Severe Thunderstorm Watch
- Wind Advisory
- High Wind Warning
- Severe Thunderstorm Warning
- Tornado Warning
The 40 most recent of 125.
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 Day 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.