City vs city
Sioux Falls vs Spearfish, SD
Sioux Falls currently scores 3 points higher overall than Spearfish, with the largest gap in tornado.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Scores describe each city’s reference grid tile, not every property. A missing model is unavailable, not zero risk. Air quality is a current EPA AirNow signal; other factors describe baseline exposure. The overall score blends different hazards and is not a probability of damage. Read the scoring methodology and sources.
Overall
Sioux Falls: 50/100 · Spearfish: 47/100
Sioux Falls is 3 points higher.
Flood
Sioux Falls: 52/100 · Spearfish: 47/100
Sioux Falls is 5 points higher.
Sioux Falls: FEMA NFHL flood zones: 17 features intersect this tile.
Spearfish: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Sioux Falls: 20/100 · Spearfish: 19/100
Sioux Falls is 1 points higher.
Sioux Falls: Wind exposure derived from ingested design wind / climatology tiles.
Spearfish: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Sioux Falls: 46/100 · Spearfish: 28/100
Sioux Falls is 18 points higher.
Sioux Falls: Lightning exposure derived from ingested climatology tiles.
Spearfish: Lightning exposure derived from ingested climatology tiles.
Tornado
Sioux Falls: 58/100 · Spearfish: 0/100
Sioux Falls is 58 points higher.
Sioux Falls: Tornado risk derived from NOAA SPC historical reports.
Spearfish: Tornado risk derived from NOAA SPC historical reports.
Hail
Sioux Falls: 100/100 · Spearfish: 100/100
No gap.
Sioux Falls: Hail risk derived from NOAA SPC historical reports.
Spearfish: Hail risk derived from NOAA SPC historical reports.
Storm surge
Sioux Falls: Unavailable · Spearfish: Unavailable
A score difference cannot be calculated without both sources.
Sioux Falls: Storm surge model is not available for this location yet.
Spearfish: Storm surge model is not available for this location yet.
Wildfire
Sioux Falls: 51/100 · Spearfish: 59/100
Spearfish is 8 points higher.
Sioux Falls: Wildfire exposure derived from ingested fire potential tiles.
Spearfish: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Sioux Falls: 21/100 · Spearfish: 28/100
Spearfish is 7 points higher.
Sioux Falls: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Spearfish: Air quality signal derived from the latest EPA AirNow combined AQI grid.