City vs city
Lead vs Spearfish, SD
Spearfish currently scores 7 points higher overall than Lead, 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 uses an ingested EPA AirNow snapshot and may not reflect current conditions; 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
Lead: 40/100 · Spearfish: 47/100
Spearfish is 7 points higher.
Flood
Lead: 43/100 · Spearfish: 47/100
Spearfish is 4 points higher.
Lead: FEMA NFHL flood zones: 2 features intersect this tile.
Spearfish: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Lead: 19/100 · Spearfish: 19/100
No gap.
Lead: Wind exposure derived from ingested design wind / climatology tiles.
Spearfish: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Lead: 25/100 · Spearfish: 28/100
Spearfish is 3 points higher.
Lead: Lightning exposure derived from ingested climatology tiles.
Spearfish: Lightning exposure derived from ingested climatology tiles.
Tornado
Lead: 8/100 · Spearfish: 0/100
Lead is 8 points higher.
Lead: Tornado risk derived from NOAA SPC historical reports.
Spearfish: Tornado risk derived from NOAA SPC historical reports.
Hail
Lead: 100/100 · Spearfish: 100/100
No gap.
Lead: Hail risk derived from NOAA SPC historical reports.
Spearfish: Hail risk derived from NOAA SPC historical reports.
Storm surge
Lead: Unavailable · Spearfish: Unavailable
A score difference cannot be calculated without both sources.
Lead: Storm surge model is not available for this location yet.
Spearfish: Storm surge model is not available for this location yet.
Wildfire
Lead: 54/100 · Spearfish: 59/100
Spearfish is 5 points higher.
Lead: Wildfire exposure derived from ingested fire potential tiles.
Spearfish: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Lead: 28/100 · Spearfish: 28/100
No gap.
Lead: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Spearfish: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.