Storm History: Snohomish County, Washington
Every storm the National Weather Service has filed in Snohomish County, Washington: floods, hail, damaging wind, tornadoes, winter storms, heat and the rest, with the most serious on record. Events filed by forecast zone count for every county the zone covers.
The record
- Events
- 54
- Deaths
- 44
- Injuries
- 13
- Damage
- $84 million
- Episodes
- 54
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
Every year
By kind of event
Counted under the kind that heads each episode.
| Kind of event | Events | Deaths | Injuries | Damage |
|---|---|---|---|---|
| Debris Flow | 12 | 43 | 12 | $81 million |
| Lightning | 9 | 1 | 1 | $69,000 |
| Funnel Cloud | 9 | 0 | 0 | |
| Tornado | 7 | 0 | 0 | $56,000 |
| Thunderstorm Wind | 5 | 0 | 0 | $35,000 |
| Flood | 5 | 0 | 0 | $3.0 million |
| Hail | 3 | 0 | 0 | $50,000 |
| Heavy Rain | 3 | 0 | 0 | $20,000 |
| Flash Flood | 1 | 0 | 0 |
The deadliest
The costliest
Damage within this county, in the dollars of its year.
- Debris Flow, March 22, 2014
- Debris Flow, December 2, 2007
- Debris Flow, January 7, 2009
- Debris Flow, November 4, 2006
- Flood, November 12, 2021
- Debris Flow, December 12, 2010
- Flood, January 12, 2021
- Flood, November 14, 2015
- Debris Flow, November 12, 2008
- Hail, May 19, 2005
- Debris Flow, January 13, 2011
- Debris Flow, December 16, 2012
- Lightning, April 10, 1997
- Thunderstorm Wind, December 14, 2010
- Tornado, November 24, 1970
- Tornado, October 26, 1971
- Lightning, November 4, 2008
- Heavy Rain, August 6, 2004
- Tornado, May 18, 2005
- Flood, May 31, 1997
The largest hail
The largest stone in each episode, which may have fallen in a neighboring county of the same episode.
The strongest tornadoes
Every episode, newest first
- Flood, December 4, 2023
- Flood, November 12, 2021
- Flood, January 12, 2021
- Flash Flood, April 20, 2017
- Debris Flow, April 3, 2017
- Funnel Cloud, June 18, 2016
- Funnel Cloud, March 27, 2016
- Flood, November 14, 2015
- Debris Flow, March 22, 2014
- Debris Flow, January 9, 2014
- Debris Flow, December 16, 2012
- Debris Flow, November 19, 2012
- Thunderstorm Wind, June 23, 2012
- Debris Flow, January 13, 2011
- Thunderstorm Wind, December 14, 2010
- Debris Flow, December 12, 2010
- Funnel Cloud, June 4, 2010
- Funnel Cloud, April 24, 2010
- Debris Flow, January 7, 2009
- Debris Flow, November 12, 2008
- Lightning, November 4, 2008
- Debris Flow, December 2, 2007
- Funnel Cloud, April 24, 2007
- Debris Flow, November 4, 2006
- Tornado, June 16, 2006
- Hail, April 15, 2006
- Lightning, October 1, 2005
- Lightning, September 9, 2005
- Thunderstorm Wind, June 21, 2005
- Hail, May 19, 2005
- Tornado, May 18, 2005
- Lightning, September 1, 2004
- Heavy Rain, August 6, 2004
- Tornado, June 5, 2004
- Funnel Cloud, May 28, 2004
- Heavy Rain, November 13, 2001
- Heavy Rain, August 21, 2001
- Hail, March 13, 2001
- Funnel Cloud, April 22, 2000
- Lightning, August 3, 1999
- Lightning, June 8, 1998
- Funnel Cloud, December 8, 1997
- Tornado, August 24, 1997
- Lightning, August 6, 1997
- Flood, May 31, 1997
- Funnel Cloud, May 31, 1997
- Lightning, April 10, 1997
- Debris Flow, January 15, 1997
- Lightning, September 15, 1996
- Thunderstorm Wind, September 9, 1988
- Tornado, May 13, 1986
- Thunderstorm Wind, April 28, 1976
- Tornado, October 26, 1971
- Tornado, November 24, 1970
More
Tornadoes in Snohomish CountyEvery warning in Snohomish County since 1986Every county in Washington
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.