Environmental Risk Report for Roberts County, South Dakota
Comprehensive environmental hazard assessment
Coordinates: 45.6298°N, 96.9461°W • FIPS: 46109
Risk Assessment for Roberts County, South Dakota
About Roberts County, South Dakota
Roberts County is a county in SD known for its temperate continental climate with four distinct seasons. Located within Tornado Alley, the area experiences some of the most intense severe weather events in the world.
Roberts County sits within the central United States tornado corridor, where colliding air masses create ideal conditions for supercell thunderstorms and violent tornadoes. The region's flat terrain provides no natural barriers to severe weather systems, and the spring storm season can produce devastating outbreaks of multiple tornadoes in a single day.
Notable historical events affecting this area include the 1972 Rapid City Flood (238 deaths, one of deadliest flash floods in US history). These events underscore the importance of environmental risk awareness and preparedness for residents and property owners.
Notable Historical Events in South Dakota
Understanding Risk Factors for Roberts County
🌪️ Tornado Risk
Roberts County lies within America's Tornado Alley, where warm Gulf air collides with cold Canadian fronts to create conditions favorable for violent tornadoes. Peak tornado season runs from April through June, though tornadoes can occur year-round. The area has implemented advanced warning systems and many communities have storm shelters.
🌊 Flood Risk
Flood risk in Roberts County is assessed using FEMA flood zone data, historical flood events, and proximity to water bodies. Areas near rivers, coastlines, and low-lying regions typically face elevated flood potential. Local topography and drainage infrastructure play a significant role in determining neighborhood-level risk.
❄️ Winter Storm Risk
Roberts County experiences severe winter weather including blizzards, ice storms, and dangerously low wind chills. Heavy snowfall can collapse roofs, ice accumulation can bring down power lines, and freeze-thaw cycles damage roads and infrastructure. Winter storm preparedness is essential for residents.
💨 Air Quality
Air quality monitoring in Roberts County draws from EPA AirNow sensors measuring particulate matter (PM2.5), ozone levels, and other pollutants that affect respiratory health. Seasonal variations and agricultural or industrial activity can influence local air quality.
🔥 Wildfire Risk
Wildfire risk evaluation considers vegetation density, climate conditions, historical fire data, and terrain characteristics in Roberts County. Seasonal weather patterns and local land management practices influence the area's fire vulnerability.
Other County Risk Reports in South Dakota
Compare environmental risk scores across South Dakota counties — flood, earthquake, wildfire and more