City vs city
Porcupine vs Rapid City, SD
Rapid City currently scores 4 points higher overall than Porcupine, with the largest gap in hail.
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
Porcupine: 39/100 · Rapid City: 43/100
Rapid City is 4 points higher.
Flood
Porcupine: Unavailable · Rapid City: 53/100
A score difference cannot be calculated without both sources.
Porcupine: Flood model is not available for this location yet.
Rapid City: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Porcupine: 20/100 · Rapid City: 20/100
No gap.
Porcupine: Wind exposure derived from ingested design wind / climatology tiles.
Rapid City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Porcupine: 39/100 · Rapid City: 23/100
Porcupine is 16 points higher.
Porcupine: Lightning exposure derived from ingested climatology tiles.
Rapid City: Lightning exposure derived from ingested climatology tiles.
Tornado
Porcupine: 0/100 · Rapid City: 23/100
Rapid City is 23 points higher.
Porcupine: Tornado risk derived from NOAA SPC historical reports.
Rapid City: Tornado risk derived from NOAA SPC historical reports.
Hail
Porcupine: 68/100 · Rapid City: 100/100
Rapid City is 32 points higher.
Porcupine: Hail risk derived from NOAA SPC historical reports.
Rapid City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Porcupine: Unavailable · Rapid City: Unavailable
A score difference cannot be calculated without both sources.
Porcupine: Storm surge model is not available for this location yet.
Rapid City: Storm surge model is not available for this location yet.
Wildfire
Porcupine: 75/100 · Rapid City: 57/100
Porcupine is 18 points higher.
Porcupine: Wildfire exposure derived from ingested fire potential tiles.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Porcupine: 33/100 · Rapid City: 28/100
Porcupine is 5 points higher.
Porcupine: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Rapid City: Air quality signal derived from the latest EPA AirNow combined AQI grid.