Aberdeen, SD
Local storm history & FEMA National Risk Index data
Aberdeen is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Brown County, SD. The county's highest-rated hazards are winter weather, cold wave, and hail.
Storm events near Aberdeen
NOAA-recorded tornado, hail, and flood events within 25 miles of Aberdeen's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Aberdeen 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 Brown County's FEMA National Risk Index scores, covering Aberdeen along with the rest of the county, not a Aberdeen-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 77.1 | Relatively Low |
| Inland Flooding | 63.1 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 27.8 | Very Low |
| Heat Wave | 48.7 | Relatively Low |
| Tornado | 70.1 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 96.4 | Relatively High |
| Drought | 30.6 | Very Low |
| Hail | 86.5 | Relatively Moderate |
| Hurricane | — | Not Applicable |
| Ice Storm | 81.7 | Relatively Moderate |
| Landslide | 44.4 | Very Low |
| Lightning | 7.6 | Very Low |
| Strong Wind | 82.5 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 98.2 | Very High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Brown County risk profile for disaster declarations, social vulnerability, and climate projection data.
More on Brown County:
Frequently asked questions
What natural hazards is Aberdeen, SD at risk of?
Aberdeen 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 Brown County, where Aberdeen is located, are winter weather, cold wave, and hail.
What is Aberdeen's biggest natural hazard risk?
Winter Weather is the highest-rated hazard for Brown County, where Aberdeen is located, scoring 98.2 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Aberdeen a high-risk area for natural disasters?
No — Aberdeen carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Brown County.
Has Aberdeen had tornadoes, hail, or flooding?
NOAA has recorded 8 tornado, 91 hail, 65 inland flooding events within 25 miles of Aberdeen since 2016.