City vs city
Karns vs Powell, TN
Powell currently scores 4 points higher overall than Karns, 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 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
Karns: 33/100 · Powell: 37/100
Powell is 4 points higher.
Flood
Karns: 38/100 · Powell: 40/100
Powell is 2 points higher.
Karns: FEMA NFHL flood zones: 12 features intersect this tile.
Powell: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Karns: 13/100 · Powell: 13/100
No gap.
Karns: Wind exposure derived from ingested design wind / climatology tiles.
Powell: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Karns: 42/100 · Powell: 41/100
Karns is 1 points higher.
Karns: Lightning exposure derived from ingested climatology tiles.
Powell: Lightning exposure derived from ingested climatology tiles.
Tornado
Karns: 19/100 · Powell: 23/100
Powell is 4 points higher.
Karns: Tornado risk derived from NOAA SPC historical reports.
Powell: Tornado risk derived from NOAA SPC historical reports.
Hail
Karns: 53/100 · Powell: 72/100
Powell is 19 points higher.
Karns: Hail risk derived from NOAA SPC historical reports.
Powell: Hail risk derived from NOAA SPC historical reports.
Storm surge
Karns: Unavailable · Powell: Unavailable
A score difference cannot be calculated without both sources.
Karns: Storm surge model is not available for this location yet.
Powell: Storm surge model is not available for this location yet.
Wildfire
Karns: 34/100 · Powell: 36/100
Powell is 2 points higher.
Karns: Wildfire exposure derived from ingested fire potential tiles.
Powell: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Karns: 33/100 · Powell: 33/100
No gap.
Karns: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Powell: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.