Mount Vernon, OH
Local storm history & FEMA National Risk Index data
Mount Vernon is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Knox County, OH. The county's highest-rated hazards are hail, strong wind, and ice storm.
Storm events near Mount Vernon
NOAA-recorded tornado, hail, and flood events within 25 miles of Mount Vernon's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Mount Vernon itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Knox County's FEMA National Risk Index scores, covering Mount Vernon along with the rest of the county, not a Mount Vernon-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 36.2 | Very Low |
| Inland Flooding | 72 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 48.5 | Very Low |
| Heat Wave | 58.5 | Relatively Low |
| Tornado | 64.3 | Relatively Low |
| Avalanche | — | Not Applicable |
| Cold Wave | 58.1 | Relatively Low |
| Drought | 0 | No Rating |
| Hail | 85.5 | Relatively Moderate |
| Hurricane | 40.9 | Very Low |
| Ice Storm | 79 | Relatively Moderate |
| Landslide | 65 | Relatively Low |
| Lightning | 64.8 | Relatively Moderate |
| Strong Wind | 81.9 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 77.8 | Relatively Moderate |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Knox County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Knox County:
Frequently asked questions
What natural hazards is Mount Vernon, OH at risk of?
Mount Vernon is rated Relatively Low for overall natural hazard risk by FEMA's National Risk Index — lower risk than most US counties. The highest-rated hazards for Knox County, where Mount Vernon is located, are hail, strong wind, and ice storm.
What is Mount Vernon's biggest natural hazard risk?
Hail is the highest-rated hazard for Knox County, where Mount Vernon is located, scoring 85.5 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Mount Vernon a high-risk area for natural disasters?
No — Mount Vernon carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Knox County.
Has Mount Vernon had tornadoes, hail, or flooding?
NOAA has recorded 16 tornado, 72 hail, 58 inland flooding events within 25 miles of Mount Vernon since 2016.