Mason County, Washington severe weather history spans 17 recorded events between 1985 and 2025. The dominant hazard is heavy rain, accounting for 47.1% of all recorded events. It ranks #3,164 nationally and #33 in Washington.
17
Recorded events
1
Direct deaths
1
Direct injuries
$18.0M
Property damage
The record
What the Mason County, Washington severe weather history record shows
Across the archive, Mason County, Washington severe weather history averages 0.4 recorded events a year. The busiest stretch on record is the 2000s, with 6 events logged in that decade alone. Roughly 1 events fall before 1990 and 16 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The deadliest hazard in the Mason County, Washington record is flood, responsible for 1 direct deaths. The costliest is heavy rain, with $16.2M in reported property damage. In total, 5 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Mason County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Heavy Rain | 8 | 0 | $16.2M | 63 | 1996–2025 |
| Flood | 5 | 1 | $1.6M | 0 | 2007–2021 |
| Lightning | 2 | 0 | $72K | 0 | 1997–2013 |
| Tornado | 1 | 0 | $150K | EF1 | 2019–2019 |
| Hail | 1 | 0 | $0 | 1 | 1985–1985 |
Decade by decade
Mason County, Washington severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
1 mapped tornado paths intersect this county: 1 touched down inside it and 0 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 2019-10-18 | EF1 | 0 | 0 | 0.7 mi | Touched down here |
Significant events
Deadliest events on record in Mason County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Dec 3, 2007 | Flood | POTLATCH | 1 | 0 | $12K |
| Sep 5, 2013 | Lightning | (SHN)SANDERSON FLD S | 0 | 1 | $2K |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
The Skokomish at Potlatch reach a record flood stage of 18.12 feet. Two bridges were washed away, one over the Tahuya River and one over Finch creek. All schools in the county were closed monday. Several roads were closed and a few people were evacuated from their homes. A man was swept away in the Tahuya river.
All of highway 106 in Mason county was closed due to flooding and mudslides. A foot bridge in the Tahuya State Forest was closed after floods washed out the concrete entry. Several homes were reported flooded in Mason county.
Between approximately 6:02 – 6:07 PM on the evening of October 18, a tornado touched down near Shelton in Mason County, Washington and traveled approximately 0.68 miles before moving over the water of Pickering Passage and dissipating as a waterspout. The first video evidence and reports from area fire officials prompted the NWS to send a damage survey team to the area during the afternoon of October 19, 2019. Preliminary evaluation of the damage by the team concluded that the tornado reached an EF-1 rating. The damage path was up to 90 yards in width and the tornado was estimated to be on the ground for approximately 5 minutes.||Fortunately, no injuries were reported with this tornado. Most of the damage was in the form of uprooted or snapped soft wood fir and cedar trees. Falling trees did impact at least two houses along the damage path, including one house that had two trees fall on the roof.
Context
Risk, population and federal disasters
Relatively Moderate
FEMA NRI risk rating
67,982
Population (ACS)
$412K
Median home value
32
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Apr 7, 2026 | Flood | SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR |
| Dec 12, 2025 | Flood | SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | EM |
| Apr 28, 2024 | Severe Storm | SEVERE WINTER STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR |
| Jul 5, 2023 | Fire | MCEWAN FIRE | FM |
| Mar 29, 2022 | Flood | SEVERE WINTER STORMS, SNOWSTORMS, STRAIGHT-LINE WINDS, FLOODING | DR |
| Apr 8, 2021 | Severe Storm | SEVERE WINTER STORM, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR |
Quick answers
Frequently asked
How many severe weather events have been recorded in Mason County, Washington?
17 events are on record between 1985 and 2025, causing 1 direct deaths and $18.0M in property damage.
What is the most common severe weather hazard in Mason County?
Heavy Rain, with 8 recorded events — 47.1% of everything in the archive for this county.
How many tornadoes have crossed Mason County?
1 mapped tornado paths intersect the county boundary; 1 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Mason County?
32 federal disaster declarations from FEMA include Mason County, each tied to a specific incident period.
How risky is Mason County compared with the rest of the country?
FEMA's National Risk Index rates Mason County as relatively moderate risk, placing it in the 85 percentile of its state for expected annual loss.
Where does the Mason County, Washington 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
- Lincoln County 81
- Okanogan County 231
- Lewis County 19
- Pacific County 27
- Klickitat County 28
- Pend Oreille County 87
Cite this page
“Mason County, Washington.” Severe Weather History. severeweatherhistory.com/county/washington/mason-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.