City vs city
Johnson City vs Roan Mountain, TN
Johnson City currently scores 6 points higher overall than Roan Mountain, 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
Johnson City: 33/100 · Roan Mountain: 27/100
Johnson City is 6 points higher.
Flood
Johnson City: 34/100 · Roan Mountain: 22/100
Johnson City is 12 points higher.
Johnson City: FEMA NFHL flood zones: 6 features intersect this tile.
Roan Mountain: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Johnson City: 14/100 · Roan Mountain: 15/100
Roan Mountain is 1 points higher.
Johnson City: Wind exposure derived from ingested design wind / climatology tiles.
Roan Mountain: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Johnson City: 30/100 · Roan Mountain: 36/100
Roan Mountain is 6 points higher.
Johnson City: Lightning exposure derived from ingested climatology tiles.
Roan Mountain: Lightning exposure derived from ingested climatology tiles.
Tornado
Johnson City: 8/100 · Roan Mountain: 0/100
Johnson City is 8 points higher.
Johnson City: Tornado risk derived from NOAA SPC historical reports.
Roan Mountain: Tornado risk derived from NOAA SPC historical reports.
Hail
Johnson City: 58/100 · Roan Mountain: 8/100
Johnson City is 50 points higher.
Johnson City: Hail risk derived from NOAA SPC historical reports.
Roan Mountain: Hail risk derived from NOAA SPC historical reports.
Storm surge
Johnson City: Unavailable · Roan Mountain: Unavailable
A score difference cannot be calculated without both sources.
Johnson City: Storm surge model is not available for this location yet.
Roan Mountain: Storm surge model is not available for this location yet.
Wildfire
Johnson City: 50/100 · Roan Mountain: 52/100
Roan Mountain is 2 points higher.
Johnson City: Wildfire exposure derived from ingested fire potential tiles.
Roan Mountain: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Johnson City: 35/100 · Roan Mountain: 31/100
Johnson City is 4 points higher.
Johnson City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Roan Mountain: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.