City vs city
Grand Forks vs Riverdale, ND
Grand Forks currently scores 7 points higher overall than Riverdale, 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
Grand Forks: 32/100 · Riverdale: 25/100
Grand Forks is 7 points higher.
Flood
Grand Forks: 41/100 · Riverdale: 39/100
Grand Forks is 2 points higher.
Grand Forks: FEMA NFHL flood zones: 7 features intersect this tile.
Riverdale: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Grand Forks: 18/100 · Riverdale: 18/100
No gap.
Grand Forks: Wind exposure derived from ingested design wind / climatology tiles.
Riverdale: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grand Forks: 19/100 · Riverdale: 26/100
Riverdale is 7 points higher.
Grand Forks: Lightning exposure derived from ingested climatology tiles.
Riverdale: Lightning exposure derived from ingested climatology tiles.
Tornado
Grand Forks: 4/100 · Riverdale: 4/100
No gap.
Grand Forks: Tornado risk derived from NOAA SPC historical reports.
Riverdale: Tornado risk derived from NOAA SPC historical reports.
Hail
Grand Forks: 100/100 · Riverdale: 19/100
Grand Forks is 81 points higher.
Grand Forks: Hail risk derived from NOAA SPC historical reports.
Riverdale: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grand Forks: Unavailable · Riverdale: Unavailable
A score difference cannot be calculated without both sources.
Grand Forks: Storm surge model is not available for this location yet.
Riverdale: Storm surge model is not available for this location yet.
Wildfire
Grand Forks: 27/100 · Riverdale: 30/100
Riverdale is 3 points higher.
Grand Forks: Wildfire exposure derived from ingested fire potential tiles.
Riverdale: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grand Forks: 14/100 · Riverdale: 38/100
Riverdale is 24 points higher.
Grand Forks: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Riverdale: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.