City vs city
Blackhawk vs Johnson Siding, SD
Blackhawk and Johnson Siding are tied on overall score, with the biggest factor difference in lightning.
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
Blackhawk: 47/100 · Johnson Siding: 47/100
No gap.
Flood
Blackhawk: 44/100 · Johnson Siding: 44/100
No gap.
Blackhawk: FEMA NFHL flood zones: 5 features intersect this tile.
Johnson Siding: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Blackhawk: 20/100 · Johnson Siding: 19/100
Blackhawk is 1 points higher.
Blackhawk: Wind exposure derived from ingested design wind / climatology tiles.
Johnson Siding: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Blackhawk: 21/100 · Johnson Siding: 23/100
Johnson Siding is 2 points higher.
Blackhawk: Lightning exposure derived from ingested climatology tiles.
Johnson Siding: Lightning exposure derived from ingested climatology tiles.
Tornado
Blackhawk: 0/100 · Johnson Siding: 0/100
No gap.
Blackhawk: Tornado risk derived from NOAA SPC historical reports.
Johnson Siding: Tornado risk derived from NOAA SPC historical reports.
Hail
Blackhawk: 100/100 · Johnson Siding: 100/100
No gap.
Blackhawk: Hail risk derived from NOAA SPC historical reports.
Johnson Siding: Hail risk derived from NOAA SPC historical reports.
Storm surge
Blackhawk: Unavailable · Johnson Siding: Unavailable
A score difference cannot be calculated without both sources.
Blackhawk: Storm surge model is not available for this location yet.
Johnson Siding: Storm surge model is not available for this location yet.
Wildfire
Blackhawk: 67/100 · Johnson Siding: 69/100
Johnson Siding is 2 points higher.
Blackhawk: Wildfire exposure derived from ingested fire potential tiles.
Johnson Siding: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Blackhawk: 27/100 · Johnson Siding: 27/100
No gap.
Blackhawk: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Johnson Siding: Air quality signal derived from the latest EPA AirNow combined AQI grid.