City vs city
Barnwell vs Williston, SC
Barnwell currently scores 8 points higher overall than Williston, 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
Barnwell: 41/100 · Williston: 33/100
Barnwell is 8 points higher.
Flood
Barnwell: 35/100 · Williston: 28/100
Barnwell is 7 points higher.
Barnwell: FEMA NFHL flood zones: 12 features intersect this tile.
Williston: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Barnwell: 26/100 · Williston: 24/100
Barnwell is 2 points higher.
Barnwell: Wind exposure derived from ingested design wind / climatology tiles.
Williston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Barnwell: 69/100 · Williston: 68/100
Barnwell is 1 points higher.
Barnwell: Lightning exposure derived from ingested climatology tiles.
Williston: Lightning exposure derived from ingested climatology tiles.
Tornado
Barnwell: 12/100 · Williston: 8/100
Barnwell is 4 points higher.
Barnwell: Tornado risk derived from NOAA SPC historical reports.
Williston: Tornado risk derived from NOAA SPC historical reports.
Hail
Barnwell: 53/100 · Williston: 7/100
Barnwell is 46 points higher.
Barnwell: Hail risk derived from NOAA SPC historical reports.
Williston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Barnwell: Unavailable · Williston: Unavailable
A score difference cannot be calculated without both sources.
Barnwell: Storm surge model is not available for this location yet.
Williston: Storm surge model is not available for this location yet.
Wildfire
Barnwell: 69/100 · Williston: 73/100
Williston is 4 points higher.
Barnwell: Wildfire exposure derived from ingested fire potential tiles.
Williston: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Barnwell: 26/100 · Williston: 26/100
No gap.
Barnwell: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Williston: Air quality signal derived from the latest EPA AirNow combined AQI grid.