City vs city
Grafton vs Williston, ND
Williston currently scores 5 points higher overall than Grafton, 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
Grafton: 30/100 · Williston: 35/100
Williston is 5 points higher.
Flood
Grafton: 81/100 · Williston: 41/100
Grafton is 40 points higher.
Grafton: FEMA NFHL flood zones: 12 features intersect this tile.
Williston: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Grafton: 18/100 · Williston: 18/100
No gap.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
Williston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 26/100 · Williston: 19/100
Grafton is 7 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
Williston: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 15/100 · Williston: 4/100
Grafton is 11 points higher.
Grafton: Tornado risk derived from NOAA SPC historical reports.
Williston: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · Williston: 100/100
Williston is 62 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
Williston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · Williston: Unavailable
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
Williston: Storm surge model is not available for this location yet.
Wildfire
Grafton: 20/100 · Williston: 37/100
Williston is 17 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
Williston: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 11/100 · Williston: 23/100
Williston is 12 points higher.
Grafton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Williston: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.