City vs city
Gregory vs Watertown, SD
Watertown currently scores 10 points higher overall than Gregory, with the largest gap in tornado.
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
Gregory: 40/100 · Watertown: 50/100
Watertown is 10 points higher.
Flood
Gregory: Unavailable · Watertown: 79/100
A score difference cannot be calculated without both sources.
Gregory: Flood model is not available for this location yet.
Watertown: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Gregory: 21/100 · Watertown: 20/100
Gregory is 1 points higher.
Gregory: Wind exposure derived from ingested design wind / climatology tiles.
Watertown: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Gregory: 32/100 · Watertown: 42/100
Watertown is 10 points higher.
Gregory: Lightning exposure derived from ingested climatology tiles.
Watertown: Lightning exposure derived from ingested climatology tiles.
Tornado
Gregory: 46/100 · Watertown: 0/100
Gregory is 46 points higher.
Gregory: Tornado risk derived from NOAA SPC historical reports.
Watertown: Tornado risk derived from NOAA SPC historical reports.
Hail
Gregory: 100/100 · Watertown: 100/100
No gap.
Gregory: Hail risk derived from NOAA SPC historical reports.
Watertown: Hail risk derived from NOAA SPC historical reports.
Storm surge
Gregory: Unavailable · Watertown: Unavailable
A score difference cannot be calculated without both sources.
Gregory: Storm surge model is not available for this location yet.
Watertown: Storm surge model is not available for this location yet.
Wildfire
Gregory: 40/100 · Watertown: 38/100
Gregory is 2 points higher.
Gregory: Wildfire exposure derived from ingested fire potential tiles.
Watertown: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Gregory: Unavailable · Watertown: 21/100
A score difference cannot be calculated without both sources.
Gregory: Air quality model is not available for this location yet.
Watertown: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.