Connecticut avalanche risk
Northwest Hills Planning Region has the highest avalanche risk in Connecticut, scoring 50.6 out of 100 — rated "Very Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Northwest Hills Planning Region | 50.6 | Very Low |
| 2 | Western Connecticut Planning Region | 24.6 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Avalanche risk nationally:
Other hazard risks in Connecticut:
Frequently asked questions
What is the highest avalanche risk county in Connecticut?
Northwest Hills Planning Region, CT has the highest avalanche risk in Connecticut, with a FEMA National Risk Index score of 50.6 out of 100 (rated "Very Low").
What causes avalanche risk in Connecticut?
Avalanche risk reflects expected annual losses from snow avalanche events, primarily affecting mountain counties in the West. The highest scores belong to Colorado, Utah, Montana, and Washington counties where active ski terrain, mountain highways, and communities overlap with historically active avalanche paths and high seasonal snowpack. Avalanche events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.