Pennsylvania avalanche risk
Clinton County has the highest avalanche risk in Pennsylvania, scoring 76 out of 100 — rated "Relatively Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Clinton County | 76 | Relatively Low |
| 2 | Lycoming County | 75.4 | Relatively Low |
| 3 | Cameron County | 74.9 | Relatively Low |
| 4 | Tioga County | 70.6 | Relatively Low |
| 5 | Potter County | 66.5 | Very Low |
| 6 | Centre County | 65.2 | Very Low |
| 7 | Sullivan County | 64.3 | Very Low |
| 8 | Huntingdon County | 62.3 | Very Low |
| 9 | Fayette County | 59.8 | Very Low |
| 10 | Blair County | 59.5 | Very Low |
| 11 | Elk County | 59.1 | Very Low |
| 12 | Wyoming County | 58.6 | Very Low |
| 13 | Carbon County | 58.5 | Very Low |
| 14 | Luzerne County | 57.9 | Very Low |
| 15 | Bedford County | 57.7 | Very Low |
| 16 | Mifflin County | 57.3 | Very Low |
| 17 | Bradford County | 53.9 | Very Low |
| 18 | Venango County | 53.7 | Very Low |
| 19 | Juniata County | 52.6 | Very Low |
| 20 | Armstrong County | 52.5 | Very Low |
| 21 | Cambria County | 51.2 | Very Low |
| 22 | Franklin County | 48.7 | Very Low |
| 23 | Clearfield County | 48 | Very Low |
| 24 | Columbia County | 46.6 | Very Low |
| 25 | Warren County | 45.9 | Very Low |
| 26 | Forest County | 45.5 | Very Low |
| 27 | Somerset County | 44.7 | Very Low |
| 28 | Westmoreland County | 44 | Very Low |
| 29 | Pike County | 42.8 | Very Low |
| 30 | Northumberland County | 42.7 | Very Low |
| 31 | Indiana County | 42.1 | Very Low |
| 32 | Perry County | 41.7 | Very Low |
| 33 | Dauphin County | 41.1 | Very Low |
| 34 | Clarion County | 40.8 | Very Low |
| 35 | Schuylkill County | 39.6 | Very Low |
| 36 | Lackawanna County | 37 | Very Low |
| 37 | Northampton County | 35.5 | Very Low |
| 38 | Wayne County | 34.6 | Very Low |
| 39 | Union County | 33.5 | Very Low |
| 40 | Berks County | 32.6 | Very Low |
| 41 | Cumberland County | 32 | Very Low |
| 42 | Beaver County | 30.4 | Very Low |
| 43 | Monroe County | 29.8 | Very Low |
| 44 | Lebanon County | 28.7 | Very Low |
| 45 | Allegheny County | 28.1 | Very Low |
| 46 | Susquehanna County | 26.6 | Very Low |
| 47 | York County | 24.1 | Very Low |
| 48 | Fulton County | 22.4 | Very Low |
| 49 | Montour County | 19.9 | Very Low |
| 50 | Bucks County | 19.6 | Very Low |
| 51 | Lancaster County | 19.4 | Very Low |
| 52 | Greene County | 17.1 | Very Low |
| 53 | Snyder County | 16.1 | Very Low |
| 54 | Jefferson County | 15.5 | Very Low |
| 55 | Lehigh County | 15.4 | Very Low |
| 56 | Lawrence County | 13.6 | Very Low |
| 57 | Washington County | 12.1 | Very Low |
| 58 | Delaware County | 11.4 | Very Low |
| 59 | McKean County | 9.1 | 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 Pennsylvania:
Frequently asked questions
What is the highest avalanche risk county in Pennsylvania?
Clinton County, PA has the highest avalanche risk in Pennsylvania, with a FEMA National Risk Index score of 76 out of 100 (rated "Relatively Low").
What causes avalanche risk in Pennsylvania?
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.