City vs city
Ballwin vs Clarkson Valley, MO
Clarkson Valley currently scores 5 points higher overall than Ballwin, 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
Ballwin: 45/100 · Clarkson Valley: 50/100
Clarkson Valley is 5 points higher.
Flood
Ballwin: 40/100 · Clarkson Valley: 54/100
Clarkson Valley is 14 points higher.
Ballwin: FEMA NFHL flood zones: 6 features intersect this tile.
Clarkson Valley: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Ballwin: 16/100 · Clarkson Valley: 16/100
No gap.
Ballwin: Wind exposure derived from ingested design wind / climatology tiles.
Clarkson Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Ballwin: 44/100 · Clarkson Valley: 43/100
Ballwin is 1 points higher.
Ballwin: Lightning exposure derived from ingested climatology tiles.
Clarkson Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Ballwin: 54/100 · Clarkson Valley: 69/100
Clarkson Valley is 15 points higher.
Ballwin: Tornado risk derived from NOAA SPC historical reports.
Clarkson Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Ballwin: 100/100 · Clarkson Valley: 100/100
No gap.
Ballwin: Hail risk derived from NOAA SPC historical reports.
Clarkson Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Ballwin: Unavailable · Clarkson Valley: Unavailable
A score difference cannot be calculated without both sources.
Ballwin: Storm surge model is not available for this location yet.
Clarkson Valley: Storm surge model is not available for this location yet.
Wildfire
Ballwin: 39/100 · Clarkson Valley: 41/100
Clarkson Valley is 2 points higher.
Ballwin: Wildfire exposure derived from ingested fire potential tiles.
Clarkson Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Ballwin: 25/100 · Clarkson Valley: 27/100
Clarkson Valley is 2 points higher.
Ballwin: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Clarkson Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.