Alaska, 2020
The year's recorded storm events, federal disaster declarations and flood insurance claims.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders.
Events by hazard
Includes events recorded by forecast zone. The state's yearly total for 2020 was 251 against 142 in 2019.
Counties with the most recorded events
| County | Events in 2020 |
|---|---|
| Bristol Bay Borough | 2 |
| Kenai Peninsula Borough | 2 |
| Denali Borough | 2 |
| Anchorage Municipality | 1 |
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 1 Dec 2020 | Forecast zone | Debris Flow | — | $20,300,000 | 2 | — |
| 9 Mar 2020 | Forecast zone | Avalanche | — | — | 1 | — |
| 25 Feb 2020 | Forecast zone | Avalanche | — | — | 1 | — |
| 10 Feb 2020 | Kenai Peninsula | Avalanche | — | — | 1 | — |
| 1 Dec 2020 | Forecast zone | Flood | — | $8,100,000 | — | — |
| 26 Oct 2020 | Forecast zone | Debris Flow | — | $4,340,000 | — | — |
| 2 Dec 2020 | Forecast zone | Debris Flow | — | $1,400,000 | — | — |
| 1 Dec 2020 | Forecast zone | Flood | — | $674,000 | — | — |
| 1 Dec 2020 | Anchorage | Flood | — | $250,000 | — | — |
| 26 Sep 2020 | Forecast zone | Flood | — | $250,000 | — | — |
| 1 Jan 2020 | Forecast zone | Flood | — | $200,000 | — | — |
| 1 Nov 2020 | Forecast zone | Debris Flow | — | $200,000 | — | — |
| 1 May 2020 | Forecast zone | Flood | — | $50,000 | — | — |
| 9 Jan 2020 | Forecast zone | Flood | — | $50,000 | — | — |
Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.
Federal disaster declarations in 2020
| Declared | Number | Type | Incident | Title | Counties |
|---|---|---|---|---|---|
| 9 Apr 2020 | DR-4533 | Major disaster | Biological | Covid-19 Pandemic | 59 |
| 13 Mar 2020 | EM-3446 | Emergency | Biological | Covid-19 | 37 |
Flood insurance claims with a 2020 date of loss
19 NFIP claims, 16 of them paid, for $439,485.
Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (1 Oct 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 1 Oct 2026.