Sully County SD in South Dakota faces tornado / blizzard risk across its 1,007 square mile area. Onida serves this small central South Dakota county on the Missouri. Sully serves as the county seat and regional emergency coordination hub.
// Preparedness Recommendations
- Identify an interior room or storm shelter.
- Monitor NOAA weather alerts continuously.
- Keep emergency kit accessible at all times.
- Prepare for sudden power outages.
// Recommended Supplies
Essential gear for power outages, severe weather, and emergency situations in your area.
- Emergency Food Supplies
- Water Filtration & Storage
- Backup Generator
- Solar Backup Power
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// Risk Intelligence
| Threat Score | 6 / 10 Moderate Risk |
| Primary Hazard | Tornado / Blizzard |
| Secondary Hazard | Red River Flooding |
| FEMA Flood Zone | Moderate |
| Federally Declared Disasters | 7 |
| Last Major Event | 2019 Missouri River Flooding |
| Event Frequency | Annual |
// Emergency Operations
| Emergency Mgmt Phone | (605) 258-2535 |
| Emergency Shelters | 3 designated facilities |
| Evacuation Routes | State and US highways |
// County Profile
| County | Sully County SD |
| State | South Dakota (SD) |
| Population | 1 |
| Area | 1,007 sq miles |
| FEMA Region | Moderate |
// Other South Dakota Counties
Hamlin County SD
Tornado / Blizzard
6/10
Moderate
Brule County SD
Tornado / Blizzard
6/10
Moderate
Lake County SD
Tornado / Blizzard
6/10
Moderate
Day County SD
Blizzard / Flash Flooding
6/10
Moderate
Sanborn County SD
Tornado / Blizzard
6/10
Moderate
Minnehaha County SD
Tornado / Severe Storm
6/10
Moderate