Avalanche Risk in New Hampshire
All New Hampshire counties ranked by FEMA National Risk Index avalanche score
Avalanche risk — fast-moving snow and debris sliding down steep mountain slopes — is rated for 9 of 10 New Hampshire counties in FEMA's National Risk Index. Coos County carries the state's highest avalanche score at 97.5, with $5M in expected annual avalanche losses.
1 New Hampshire county is rated High or Very High for avalanche, and expected annual losses from avalanche total roughly $5M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Avalanche
| # | County | Avalanche Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Coos County | Very High | 0.27 / yr | $5M | |
| 2 | Grafton County | Low | 0.01 / yr | $13K | |
| 3 | Carroll County | Low | 0.01 / yr | $4K | |
| 4 | Cheshire County | Very Low | 0.01 / yr | $246 | |
| 5 | Merrimack County | Very Low | 0.01 / yr | $119 | |
| 6 | Sullivan County | Very Low | 0.01 / yr | $80 | |
| 7 | Belknap County | Very Low | 0.01 / yr | $25 | |
| 8 | Hillsborough County | Very Low | 0.01 / yr | $28 | |
| 9 | Rockingham County | Very Low | 0.01 / yr | $3 |
9 New Hampshire counties with measurable avalanche risk. See the national avalanche ranking or all New Hampshire counties by overall risk.
Frequently Asked Questions
Which New Hampshire county has the highest avalanche risk?
Coos County has the highest FEMA avalanche risk score in New Hampshire at 97.5 (Very High), with $5M in expected annual losses and about 0.27 events per year.
How many New Hampshire counties face significant avalanche risk?
9 New Hampshire counties record measurable avalanche risk in FEMA's National Risk Index; 1 of them are rated High or Very High.