City vs city
Lewistown vs Roy, MT
Lewistown currently scores 7 points higher overall than Roy, 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
Lewistown: 33/100 · Roy: 26/100
Lewistown is 7 points higher.
Flood
Lewistown: 32/100 · Roy: 26/100
Lewistown is 6 points higher.
Lewistown: FEMA NFHL flood zones: 6 features intersect this tile.
Roy: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Lewistown: 17/100 · Roy: 17/100
No gap.
Lewistown: Wind exposure derived from ingested design wind / climatology tiles.
Roy: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Lewistown: 21/100 · Roy: 23/100
Roy is 2 points higher.
Lewistown: Lightning exposure derived from ingested climatology tiles.
Roy: Lightning exposure derived from ingested climatology tiles.
Tornado
Lewistown: 19/100 · Roy: 4/100
Lewistown is 15 points higher.
Lewistown: Tornado risk derived from NOAA SPC historical reports.
Roy: Tornado risk derived from NOAA SPC historical reports.
Hail
Lewistown: 93/100 · Roy: 47/100
Lewistown is 46 points higher.
Lewistown: Hail risk derived from NOAA SPC historical reports.
Roy: Hail risk derived from NOAA SPC historical reports.
Storm surge
Lewistown: Unavailable · Roy: Unavailable
A score difference cannot be calculated without both sources.
Lewistown: Storm surge model is not available for this location yet.
Roy: Storm surge model is not available for this location yet.
Wildfire
Lewistown: 34/100 · Roy: 54/100
Roy is 20 points higher.
Lewistown: Wildfire exposure derived from ingested fire potential tiles.
Roy: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Lewistown: 15/100 · Roy: 14/100
Lewistown is 1 points higher.
Lewistown: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Roy: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.