Clackamas County, Oregon severe weather history spans 107 recorded events between 1957 and 2025. The dominant hazard is flood, accounting for 35.5% of all recorded events. It ranks #2,862 nationally and #8 in Oregon.
107
Recorded events
3
Direct deaths
5
Direct injuries
$24.3M
Property damage
The record
What the Clackamas County, Oregon severe weather history record shows
Across the archive, Clackamas County, Oregon severe weather history averages 1.6 recorded events a year. The busiest stretch on record is the 2000s, with 48 events logged in that decade alone. Roughly 2 events fall before 1990 and 105 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The deadliest hazard in the Clackamas County, Oregon record is flood, responsible for 1 direct deaths. The costliest is flood, with $23.8M in reported property damage. In total, 9 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Clackamas County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Flood | 38 | 1 | $23.8M | 0 | 2005–2025 |
| Heavy Rain | 21 | 0 | $90K | 0 | 2001–2022 |
| Hail | 14 | 0 | $60K | 1.75 | 1996–2025 |
| Thunderstorm Wind | 14 | 1 | $18K | 70 | 1996–2025 |
| Tornado | 8 | 0 | $218K | F1 | 1957–2022 |
| Lightning | 7 | 0 | $76K | 0 | 1998–2022 |
| Debris Flow | 3 | 0 | $50K | 0 | 2022–2022 |
| Funnel Cloud | 1 | 0 | $0 | 0 | 2016–2016 |
| Flash Flood | 1 | 1 | $0 | 0 | 2014–2014 |
Decade by decade
Clackamas County, Oregon severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
8 mapped tornado paths intersect this county: 8 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 |
|---|---|---|---|---|---|
| 2000-10-09 | EF1 | 0 | 0 | 0.1 mi | Touched down here |
| 2000-10-09 | EF1 | 0 | 0 | 0.1 mi | Touched down here |
| 1957-04-12 | EF1 | 0 | 0 | 2.5 mi | Touched down here |
| 2022-10-22 | EF0 | 0 | 0 | 0.9 mi | Touched down here |
| 2020-06-13 | EF0 | 0 | 0 | 2.0 mi | Touched down here |
| 2009-10-26 | EF0 | 0 | 0 | 0.4 mi | Touched down here |
| 1998-10-03 | EF0 | 0 | 0 | 0.3 mi | Touched down here |
| 1984-10-26 | EF0 | 0 | 0 | 0.5 mi | Touched down here |
Significant events
Deadliest events on record in Clackamas County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Aug 12, 2014 | Flash Flood | ZIGZAG | 1 | 1 | $0 |
| Jan 2, 2009 | Flood | ESTACADA | 1 | 0 | $250K |
| Jan 15, 1996 | Thunderstorm Wind | CARVER | 1 | 0 | $0 |
| Jun 30, 2008 | Lightning | DAMASCUS | 0 | 2 | $0 |
| Oct 6, 2011 | Lightning | MOLALLA | 0 | 1 | $0 |
| Apr 11, 2003 | Lightning | MOLALLA | 0 | 1 | $0 |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Heavy rain combined with snowmelt runoff caused the Clackamas river to overflow its banks and floods areas near Estacada. Flood waters submerged 11 pumps in the waste water treatment plant in Estacada. The water water treatment plant was out of commission for 2 weeks. Significant flood damage also occurred to the Estacada library.
Oregon Department of Transportation reported approximately nine million dollars in damage to roads during the January 15 – 16 winter storm. The heaviest damages to roads were in the Welches, Zigzag, and Lolo Pass area of Clackamas County.
Heavy rain combined with snowmelt runoff resulting in the flooding of the Sandy River. The Sandy River at Bull Run crested at 21.8 feet (61,600 cfs) on January 16th at 21:48 PST. This was the third highest flow on record.
Context
Risk, population and federal disasters
Relatively High
FEMA NRI risk rating
423,975
Population (ACS)
$611K
Median home value
23
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Apr 7, 2026 | Severe Storm | SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR |
| Apr 13, 2024 | Severe Storm | SEVERE WINTER STORMS, STRAIGHT-LINE WINDS, LANDSLIDES, AND MUDSLIDES | DR |
| Sep 10, 2022 | Fire | MILO MCIVER FIRE | FM |
| May 4, 2021 | Severe Storm | SEVERE WINTER STORM | DR |
| Sep 15, 2020 | Fire | WILDFIRES AND STRAIGHT-LINE WINDS | DR |
| Sep 10, 2020 | Fire | WILDFIRES | EM |
Quick answers
Frequently asked
How many severe weather events have been recorded in Clackamas County, Oregon?
107 events are on record between 1957 and 2025, causing 3 direct deaths and $24.3M in property damage.
What is the most common severe weather hazard in Clackamas County?
Flood, with 38 recorded events — 35.5% of everything in the archive for this county.
How many tornadoes have crossed Clackamas County?
8 mapped tornado paths intersect the county boundary; 8 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Clackamas County?
23 federal disaster declarations from FEMA include Clackamas County, each tied to a specific incident period.
How risky is Clackamas County compared with the rest of the country?
FEMA's National Risk Index rates Clackamas County as relatively high risk, placing it in the 95 percentile of its state for expected annual loss.
Where does the Clackamas County, Oregon 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
Cite this page
“Clackamas County, Oregon.” Severe Weather History. severeweatherhistory.com/county/oregon/clackamas-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.