North Slope Borough, Alaska severe weather history spans 2 recorded events between 2022 and 2024. The dominant hazard is flood, accounting for 50.0% of all recorded events. It ranks #3,197 nationally and #5 in Alaska.
2
Recorded events
0
Direct deaths
0
Direct injuries
$0
Property damage
The record
What the North Slope Borough, Alaska severe weather history record shows
Across the archive, North Slope Borough, Alaska severe weather history averages 1.0 recorded events a year. The busiest stretch on record is the 2020s, with 2 events logged in that decade alone.
In total, 2 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in North Slope Borough
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Flood | 1 | 0 | $0 | 0 | 2022–2022 |
| Heavy Rain | 1 | 0 | $0 | 0 | 2024–2024 |
Decade by decade
North Slope Borough, Alaska severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Unalaska Roads Department reported heavy rain in Unalaska washed out several gravel roadways in the surrounding area. Blocked culverts caused additional street flooding and also washed large crevasses up to 4 ft deep in some of the roadways.
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
10,810
Population (ACS)
$218K
Median home value
8
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Apr 9, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Dec 20, 2017 | Severe Storm | SEVERE STORM | DR |
| Oct 30, 2015 | Coastal Storm | SEVERE STORM | DR |
| Dec 22, 2011 | Severe Storm | SEVERE WINTER STORMS AND FLOODING | DR |
| Sep 26, 2008 | Severe Storm | SEVERE STORMS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR |
Quick answers
Frequently asked
How many severe weather events have been recorded in North Slope Borough, Alaska?
2 events are on record between 2022 and 2024, causing 0 direct deaths and $0 in property damage.
What is the most common severe weather hazard in North Slope Borough?
Flood, with 1 recorded events — 50.0% of everything in the archive for this county.
How many federal disaster declarations cover North Slope Borough?
8 federal disaster declarations from FEMA include North Slope Borough, each tied to a specific incident period.
How risky is North Slope Borough compared with the rest of the country?
FEMA's National Risk Index rates North Slope Borough as very low risk, placing it in the 15 percentile of its state for expected annual loss.
Where does the North Slope Borough, Alaska severe weather history data come from?
Every figure is drawn from United States federal public-domain records: NOAA/NCEI Storm Events for the event archive, NOAA SPC SVRGIS for mapped tornado paths, FEMA for disaster declarations and risk ratings, and the U.S. Census for population context. Dates are shown in UTC and recent entries may still be revised by NOAA.
Nearby
Neighbouring counties
- Northwest Arctic Borough 0
- Nome Census Area 0
- Petersburg Borough 0
- Prince of Wales-Hyder Census Area 0
- Matanuska-Susitna Borough 0
- Lake and Peninsula Borough 0
Cite this page
“North Slope Borough, Alaska.” Severe Weather History. severeweatherhistory.com/county/alaska/north-slope-borough/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.