Pennsylvania ice storm risk
Bucks County has the highest ice storm risk in Pennsylvania, scoring 99.1 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Bucks County | 99.1 | Very High |
| 2 | Allegheny County | 96.1 | Very High |
| 3 | Philadelphia County | 94.2 | Relatively High |
| 4 | Delaware County | 87 | Relatively High |
| 5 | Chester County | 85.7 | Relatively High |
| 6 | Luzerne County | 82.5 | Relatively High |
| 7 | Lancaster County | 82 | Relatively Moderate |
| 8 | Montgomery County | 81 | Relatively Moderate |
| 9 | Lehigh County | 78.2 | Relatively Moderate |
| 10 | Berks County | 76.9 | Relatively Moderate |
| 11 | Monroe County | 75.3 | Relatively Moderate |
| 12 | Northampton County | 71.9 | Relatively Moderate |
| 13 | Erie County | 70.1 | Relatively Moderate |
| 14 | Lackawanna County | 68.6 | Relatively Moderate |
| 15 | York County | 63.4 | Relatively Moderate |
| 16 | Beaver County | 62.5 | Relatively Moderate |
| 17 | Westmoreland County | 62.4 | Relatively Moderate |
| 18 | Schuylkill County | 62.3 | Relatively Moderate |
| 19 | Crawford County | 57.7 | Relatively Low |
| 20 | Washington County | 57.3 | Relatively Low |
| 21 | Lebanon County | 56.4 | Relatively Low |
| 22 | Butler County | 52.8 | Relatively Low |
| 23 | Dauphin County | 51.7 | Relatively Low |
| 24 | Susquehanna County | 51.7 | Relatively Low |
| 25 | Fayette County | 51.3 | Relatively Low |
| 26 | Carbon County | 50.5 | Relatively Low |
| 27 | Columbia County | 49.6 | Relatively Low |
| 28 | Bradford County | 49.1 | Relatively Low |
| 29 | Northumberland County | 48.3 | Relatively Low |
| 30 | Cumberland County | 46.4 | Relatively Low |
| 31 | Adams County | 46.2 | Relatively Low |
| 32 | Lawrence County | 43.6 | Relatively Low |
| 33 | Mercer County | 42.2 | Relatively Low |
| 34 | Wayne County | 41.1 | Relatively Low |
| 35 | Centre County | 39.8 | Relatively Low |
| 36 | Cambria County | 38.4 | Relatively Low |
| 37 | Pike County | 38.1 | Relatively Low |
| 38 | Clearfield County | 36.3 | Relatively Low |
| 39 | Indiana County | 36.3 | Relatively Low |
| 40 | Franklin County | 36.2 | Relatively Low |
| 41 | Tioga County | 30.1 | Relatively Low |
| 42 | Somerset County | 29.9 | Relatively Low |
| 43 | Armstrong County | 27.7 | Relatively Low |
| 44 | Greene County | 27.6 | Relatively Low |
| 45 | Venango County | 26.5 | Very Low |
| 46 | Jefferson County | 26.1 | Very Low |
| 47 | Wyoming County | 25.8 | Very Low |
| 48 | Mifflin County | 23.8 | Very Low |
| 49 | Blair County | 23.4 | Very Low |
| 50 | McKean County | 22.7 | Very Low |
| 51 | Warren County | 21.7 | Very Low |
| 52 | Clarion County | 20.7 | Very Low |
| 53 | Bedford County | 20 | Very Low |
| 54 | Union County | 19.9 | Very Low |
| 55 | Snyder County | 19.2 | Very Low |
| 56 | Potter County | 16.8 | Very Low |
| 57 | Elk County | 15.5 | Very Low |
| 58 | Juniata County | 13.8 | Very Low |
| 59 | Perry County | 12.3 | Very Low |
| 60 | Lycoming County | 11.8 | Very Low |
| 61 | Sullivan County | 11.5 | Very Low |
| 62 | Huntingdon County | 10.7 | Very Low |
| 63 | Forest County | 10.6 | Very Low |
| 64 | Fulton County | 9.9 | Very Low |
| 65 | Cameron County | 6.1 | Very Low |
| 66 | Clinton County | 5.8 | Very Low |
| 67 | Montour County | 1.2 | 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.
Ice Storm risk nationally:
Other hazard risks in Pennsylvania:
Frequently asked questions
What is the highest ice storm risk county in Pennsylvania?
Bucks County, PA has the highest ice storm risk in Pennsylvania, with a FEMA National Risk Index score of 99.1 out of 100 (rated "Very High").
How many counties in Pennsylvania are rated Very High for ice storm risk?
2 of 67 scored Pennsylvania counties are rated "Very High" for ice storm risk by FEMA's National Risk Index.
What causes ice storm risk in Pennsylvania?
Ice storm risk covers damaging freezing rain and sleet accumulation, which collapses power lines, trees, and structures. The highest-risk counties cluster in a band from eastern Texas and Arkansas through the Carolinas and New England, where warm Gulf moisture overruns cold arctic air most frequently. Ice storms cause catastrophic and long-lasting power outages. Ice storm and sleet events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.