Olympia

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
2. Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.

Storm Prediction Center severe weather database, 1950 to 2025.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

Flood insurance figures are for Thurston County, the county that contains Olympia.

Claims by ZIP code

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges in Thurston County, the county that contains Olympia.

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

The drought index is for Thurston County, the county that contains Olympia.

1. The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.

NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the city centre.
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Tsunamis

Tsunami records for Thurston County.

1. Places where NOAA's Global Historical Tsunami Database records a tsunami's water arriving, with the greatest height it reached above sea level at the time. Only tsunamis NOAA rates probable or definite are counted. Heights from eyewitness accounts and tide gauges are mixed, and older events are less completely recorded.

NOAA NCEI/WDS Global Historical Tsunami Database, retrieved October 30, 2026.

Volcanoes within 100 miles

1. U.S. volcanoes within 100 miles, from the USGS Volcano Hazards Program. The threat category is the USGS 2018 National Volcanic Threat Assessment, which ranks volcanoes by how hazardous their past eruptions were and how many people and how much infrastructure lie near them. It is not a forecast of eruption.

USGS Volcano Hazards Program, retrieved October 30, 2026.

Mapped landslides

Landslides mapped in Thurston County.

Mapped by WA WGS (2,612), USGS Conterminous (12), NASA (3).

Deadly landslides

1. Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.

USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.

More event types since 1996

Costliest events since 1996

1. Dec 3, 2007Heavy Rain$14.0 million
   National Weather Service narrative

   A few homes had up to 3 inches of water in their basements. Flood waters from Swift Creek washed away part of Cedar Flat Road cutting off about 250 homes from vehicular traffic.

2. Mar 30, 1999Heavy Rain$7.0 million
   National Weather Service narrative

   Flooding and mudslides since November 1998 have damaged 75 residences. Some of the homes were not safe to reenter and the people had to relocate. Normal rainfall in the 4 month period from Nov to Feb is 29.7 inches at Olympia. From Nov 98 to Feb 99, they received 56.03 inches.

3. Jan 7, 2009Flood$3.2 million
   National Weather Service narrative

   There was flooding along the Skookumchuck River, dozens of homes in Bucoda flooded. Several roads in the area were also flooded, including SR 507.

4. May 4, 2017Thunderstorm Wind$700,000
   National Weather Service narrative

   Severe thunderstorm wind gusts peaked around 70 mph during the event between 3 and 5 PM, knocking down trees and power lines leaving nearly 50,000 without power. Several homes had trees fall on them.

5. Jan 5, 2006Heavy Rain$200,000
   National Weather Service narrative

   The Governor declared a state of emergency after rain, at times heavy, over a period of about 10 days, caused over 7 million in damage, mainly to transportation infrastructure throughout western Washington. Mudslides closed parts of I-5 near the Pierce-Thurston county line, part of Highway 20 about a half mile east of Concrete, Highway 107 near Raymond, and Highway 166 near Port Orchard - where 3 cars crashed in the mud. In Bremerton, they totaled 16.2 inches of rainfall in 3 weeks, an amount which normally falls in 2 months. Mudslides halted Amtrak passenger train service between Everett and Olympia. In King County, there were 19 road closures from water over the roadway. Many…

6. Oct 20, 2003Heavy Rain$100,000
   National Weather Service narrative

   An all time daily record rainfall total was set at Seatac Airport with 5.02 inches. Other daily records were set at Shelton with 7.20", Hoquaim with 5.39" and Olympia with 4.12". Almost all reporting stations had at least 2 inches of rain in the 24 hour period from midnight to midnight. Two sinkholes, one in Clallam and one in Mason county, damaged roads and cut off access to homes. In all, nearly 50 homes suffered damage from minor flooding especially in basements and garages. Traffic snarls were common as many roads throughout the region were temporarily closed. The national parks and forests suffered fairly extensive damage to several bridges and many trails or the roads that…

7. Nov 4, 2006Flood$100,000
   National Weather Service narrative

   Record flooding occurred on the Cowlitz, Nooksack, Puyallup, Nisqually, |Skykomish, Stillaguamish, Carbon, Snoqualmie, and Bogachiel. Major flooding occurred on the Tolt, Snohomish, Skokomish, Skagit, and White rivers. Other rivers flooding were the Satsop, Cedar, Wynoochee, Elwha, Deschutes, Dungeness, Skookumchuck, and Chehalis.

8. Jan 3, 2021Flood$63,000
   National Weather Service narrative

   The Skookumchuck River near Bucoda and Chehalis River near Grand Mound exceeded moderate flood stage. Urban and small stream flooding occurred as well.

9. Jan 13, 2021Flood$63,000
   National Weather Service narrative

   The Chehalis River near Grand Mound and Skookumchuck River near Bucoda crested above moderate flood. Urban and small stream flooding occurred as well.

10. May 27, 2004Tornado$50,000
    National Weather Service narrative

    A tornado damaged a barn, some trees, and a nearby apartment.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

All-time high

110°FJun 28, 2021

All-time low

−8°FJan 1, 1979

Warmest night

69°FJul 22, 2006

Coldest day

18°FJan 31, 1950

Wettest day

4.82 inJan 7, 2009

Snowiest day

14.2 inJan 24, 1972

Hottest year

1958mean 53.2°F

Coldest year

1955mean 47.7°F

Wettest year

195066.71 in

Driest year

194426.50 in

Station Olympia Airport (USW00024227), 200 ft elevation, 4.7 miles from the city centre. Daily records from 1941 to October 27, 2026; 99.8% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.

NOAA NCEI Global Historical Climatology Network Daily.

Declarations for Thurston County.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily, station USW00024227.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Tsunamis NOAA NCEI/WDS Global Historical Tsunami Database.
• Volcanoes USGS Volcano Hazards Program, U.S. volcanoes and 2018 threat assessment.
• Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.