Tuolumne County, California
County storm and disaster record · FIPS 06109 · population 55,536 · 2,221 sq mi
NOAA's Storm Events Database holds 1,601 records for Tuolumne County, California from 1950 through June 30, 2026, on 863 days; the most frequent are winter storm records (1,101 records). 1,535 of them are forecast-zone records, which the National Weather Service files once per zone: a county covered by several zones receives each one, so a single storm can add several records on the same day. The deadliest single record is the June 18, 2025 cold/wind chill, filed for the forecast zone West Slope Northern Sierra Nevada, which covers the county: 3 deaths. FEMA has issued 22 declarations naming the county since 1964, 20 of them for natural hazards; the latest for a natural hazard was “Dove Fire” on July 26, 2026.
The record, 1950 to 2026
Storm records filed for the county each year (2026 to June 30, 2026). Before 1996 NOAA recorded only tornadoes (from 1950), thunderstorm wind and hail (from 1955).
- recorded, no damage figure
- under $100,000
- $100,000 or more
- $1 million or more
- $10 million or more, or a death
- $100 million or more, or 10 deaths
- a year's colour: its recorded damage or deaths
- a year with a death
- 1955: wind and hail recorded from 1955
- 1996: all 48 event types from 1996
- Storm records
- 1,601on 863 days, 1950 to June 30, 2026
- Deaths recorded
- 53156 injuries
- Damage, 2025 dollars
- $426Mas filed (scale steps before 1993)
- Tornadoes
- 1strongest EF1
- FEMA declarations
- 22latest 2026
Source: NOAA NCEI Storm Events Database, records through June 30, 2026 (file revision 20260918); damage converted to 2025 dollars with the BLS CPI-U. Search the record at NCEI. BLS consumer price index.
What hazards hit Tuolumne County most?
The most frequent records are winter storm records: 1,101 since 1996. The rank column places the county among California's counties by days with a record per 1,000 square miles of land over each hazard's complete period.
| Hazard | Records | Days | First, last | Killed | Injured | Damage | Rank in state |
|---|---|---|---|---|---|---|---|
| Winter storms | 1,101 | 590 | 1996-2026 | 15 | 14 | $5.5M | 7 of 57 |
| Drought | 128 | 70 | 2000-2023 | 0 | 0 | – | 19 of 57 |
| High wind and dust storms | 123 | 78 | 1997-2025 | 2 | 5 | $238M | 37 of 57 |
| Wildfires | 108 | 82 | 1996-2025 | 6 | 132 | $79M | 9 of 57 |
| Floods | 40 | 31 | 1996-2023 | 3 | 0 | $101M | 44 of 57 |
| Heat | 29 | 19 | 2000-2025 | 1 | 0 | – | 37 of 57 |
| Extreme cold | 20 | 19 | 2008-2025 | 21 | 2 | – | 29 of 57 |
| Heavy rain | 19 | 17 | 1998-2021 | 0 | 0 | $9K | 38 of 57 |
| Severe thunderstorm wind | 12 | 10 | 2000-2023 | 0 | 0 | $1.4M | 25 of 57 |
| Landslides and avalanches | 7 | 7 | 1999-2019 | 2 | 3 | $62K | 27 of 57 |
| Hail | 6 | 5 | 2005-2023 | 0 | 0 | $2K | 45 of 57 |
| Fog, smoke and funnel clouds | 3 | 3 | 1996-2023 | 2 | 0 | $249K | 51 of 57 |
| Rip currents and high surf | 2 | 1 | 2021-2021 | 0 | 0 | – | 37 of 57 |
| Lightning | 2 | 2 | 1999-2013 | 1 | 0 | – | 29 of 57 |
| Tornadoes | 1 | 1 | 2023-2023 | 0 | 0 | $19K | 45 of 57 |
Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.
How many tornadoes has Tuolumne County had?
NOAA records 1 tornado in Tuolumne County from 2023 to 2023, the strongest rated EF1, with 0 deaths and 0 injuries recorded in the county. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.
Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 1 tornado whose track touched Tuolumne County since 1950 (NOAA's county records number 1, the same count); along their whole tracks they killed 0 people.
Map of the strongest tornado tracks in California.
Every tornado record filed for Tuolumne County (1)
| Date | Place | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2023-03-11 | Chinese, Tuolumne County | EF1 0.8 mi x 100 yd | 0 | 0 | $19K |
Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.
When was the last damaging storm in Tuolumne County?
The most recent record with damage, injuries or deaths is the February 15, 2026 winter storm ($100,000 in damage in 2025 dollars).
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2026-04-21 | Heavy SnowCalaveras County and 2 more · forecast zone Sierra Nevada Of Calaveras-Tuolumne-Southern Alpine Counties Above 5000 Ft | 0 | 0 | – | |
| 2026-04-10 | Heavy SnowAlpine County and 8 more · forecast zone West Slope Northern Sierra Nevada | 0 | 0 | – | |
| 2026-02-15 | Heavy SnowMadera County and 2 more · forecast zone Yosemite Np Outside Of The Valley | 0 | 0 | – | |
| 2026-02-15 | Heavy SnowMadera County and 2 more · forecast zone Yosemite Np Outside Of The Valley | 0 | 0 | – | |
| 2026-02-15 | Winter StormAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland | 0 | 0 | $100K | |
| 2026-02-15 | Winter StormAlpine County and 8 more · forecast zone West Slope Northern Sierra Nevada | 0 | 5 | – | |
| 2026-02-10 | Heavy SnowMadera County and 2 more · forecast zone Yosemite Np Outside Of The Valley | 0 | 0 | – | |
| 2026-01-03 | Heavy SnowMadera County and 2 more · forecast zone Yosemite Np Outside Of The Valley | 0 | 0 | – | |
| 2026-01-02 | Heavy SnowAlpine County and 8 more · forecast zone West Slope Northern Sierra Nevada | 0 | 0 | – | |
| 2025-12-24 | High WindAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland | 56 kt wind | 0 | 0 | $5K |
| 2025-12-24 | High WindAmador County and 4 more · forecast zone Northern San Joaquin Valley | 48 kt wind | 0 | 0 | $3K |
| 2025-12-24 | Heavy SnowAlpine County and 8 more · forecast zone West Slope Northern Sierra Nevada | 0 | 0 | – |
Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.
The deadliest and costliest records
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2025-06-18 | Cold/Wind ChillAlpine County and 8 more · forecast zone West Slope Northern Sierra Nevada Placer County Sheriff reported the missing hikers entered the water on June 18th and did not surface. Their bodies were recovered on June 22nd. Air temperatures at the time were in the mid 70s to 80s at the time of the report with water temperatures in the 40s to 50s. | 3 | 0 | – | |
| 2020-05-28 | Cold/Wind ChillAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland Three men went missing after being swept into the Cosumnes River in El Dorado County on Thursday. The El Dorado County Sheriff’s Office said at around 4pm a caller reported seeing the men get swept into the river and disappear. Sheriff’s deputies, a dive team, a helicopter, and multiple fire and rescue crews all ... | 3 | 0 | – | |
| 2018-07-13 | WildfireFresno County and 3 more · forecast zone S Sierra Mtns The Ferguson fire began July 13, 2018 and continued burning into August. Tragically, 2 firefighters were killed. A CalFire bulldozer operator died on July 14 when his dozer rolled off a sharp ridge. A hotshot from Sequoia/Kings Canyon National Park was killed when he was hit by a falling tree on July 29. One structure ... | 2 | 9 | – | |
| 2015-09-09 | WildfireAlpine County and 6 more · forecast zone West Slope Northern Sierra Nevada There were 70,868 acres were burned in the Butte Fire, the 7th most destructive fire in California history. There were 475 residences and 343 outbuildings destroyed, and 45 structures damaged. In the fire there were 2 civilian fatalities and 1 injury. The cause has tentatively been attributed to a PG&E power line ... | 2 | 1 | – | |
| 2024-06-25 | Cold/Wind ChillAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland Crews responded to the report of a possible drowning at Lake Clementine Trail before 5:30 p.m on June 25th, 2024. A communications manager for California State Parks said three people had attempted to swim across the river and were swept downstream by the current. A 33-year-old man was found dead in the water, the El ... | 2 | 0 | – | |
| 2021-05-14 | Cold/Wind ChillAlpine County and 6 more · forecast zone West Slope Northern Sierra Nevada Tuolumne County Sheriff has confirmed two deaths at Gods Bath Swimming Hole along the Clavey River in Stanislaus National Forest. Originally reported as 3 victims in the search and rescue, 2 were then confirmed deceased and one is recovering. Appears to be cold-water / swift-water related, as water temperatures are in ... | 2 | 0 | – | |
| 2018-03-04 | Winter WeatherAlpine County and 6 more · forecast zone West Slope Northern Sierra Nevada A mother and son died after returning from a day of skiing to their vacation condominium in Kirkwood. A chunk of snow about the size of a trailer fell from the roof of their vacation condominium, burying them under about 3 feet of snow. | 2 | 0 | – | |
| 2014-12-24 | Dense FogAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland A single engine plane (Cessna 172) crashed on a remote hillside between Gopher Flat Road and Amador Road, just north of Sutter Creek, in Amador County, CA. There were 2 adult male fatalities. The plane was flying from Gilroy, CA to Sutter Creek, CA. Foggy conditions were present at Auburn Airport to the north, between ... | 2 | 0 | $249K |
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2021-01-18 | High WindFresno County and 3 more · forecast zone Central Sierra | 87 kt wind | 0 | 0 | $218M |
| 2018-03-22 | Flash FloodMoccasin, Tuolumne County | 0 | 0 | $51M | |
| 2023-03-04 | FloodHetch Hetchy Jct, Tuolumne County | 0 | 0 | $41M | |
| 2008-07-25 | WildfireFresno County and 3 more · forecast zone S Sierra Mtns | 0 | 0 | $34M | |
| 2025-09-02 | WildfireAmador County and 6 more · forecast zone Motherlode/Camptonville To Groveland | 0 | 1 | $25M | |
| 2013-09-01 | WildfireFresno County and 3 more · forecast zone S Sierra Mtns | 0 | 0 | $19M | |
| 2011-12-01 | High WindFresno County and 3 more · forecast zone S Sierra Mtns | 174 kt wind | 0 | 0 | $13M |
| 2018-03-21 | FloodGroveland Parsons Ar, Tuolumne County | 0 | 0 | $9.4M |
Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.
Is it getting more frequent?
Records per decade for Tuolumne County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).
| Hazard | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020-26 |
|---|---|---|---|---|---|---|---|---|
| Winter storms | – | – | – | – | 43 | 235 | 457 | 366 |
| Drought | – | – | – | – | 0 | 7 | 64 z | 57 |
| High wind and dust storms | – | – | – | – | 4 | 19 | 44 | 56 |
| Wildfires | – | – | – | – | 2 | 39 | 44 | 23 |
| Floods | – | – | – | – | 10 | 11 | 12 | 7 |
| Heat | – | – | – | – | 0 | 4 | 1 | 24 |
Drought in the 2010s: 64 records against 7 in the decade before, 64 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Tuolumne County days with a record above.
Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).
What time of year?
Records by month in Tuolumne County. The two busiest months are in violet.
The values, month by month
Jan 297 · Feb 226 · Mar 230 · Apr 111 · May 64 · Jun 39 · Jul 61 · Aug 53 · Sep 56 · Oct 58 · Nov 172 · Dec 234 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began.
Federal disaster declarations for Tuolumne County
FEMA's register lists 22 declarations that include Tuolumne County: 15 major disasters, 5 emergencies and 2 fire management assistance declarations. Most were for flood (7) and severe storm (6).
| Declared | Number | Type | Title |
|---|---|---|---|
| 2026-07-26 | FM-5652 | Fire | Dove Fire |
| 2023-04-03 | DR-4699 | Severe Storm | Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides |
| 2023-03-10 | EM-3592 | Flood | Severe Winter Storms, Flooding, Landslides, and Mudslides |
| 2023-01-14 | DR-4683 | Flood | Severe Winter Storms, Flooding, Landslides, and Mudslides |
| 2020-08-22 | DR-4558 | Fire | Wildfires |
| 2020-03-22 | DR-4482 | Biological | Covid-19 Pandemic |
| 2020-03-13 | EM-3428 | Biological | Covid-19 |
| 2019-05-17 | DR-4434 | Severe Storm | Severe Winter Storms, Flooding, Landslides, and Mudslides |
| 2017-04-01 | DR-4308 | Flood | Severe Winter Storms, Flooding, and Mudslides |
| 2017-03-16 | DR-4305 | Flood | Severe Winter Storms, Flooding, and Mudslides |
| 2017-02-14 | DR-4301 | Severe Storm | Severe Winter Storms, Flooding, and Mudslides |
| 2013-12-13 | DR-4158 | Fire | Rim Fire |
| 2013-08-23 | FM-5049 | Fire | Rim Fire |
| 2006-06-05 | DR-1646 | Severe Storm | Severe Storms, Flooding, Landslides, and Mudslides |
| 2005-09-13 | EM-3248 | Hurricane | Hurricane Katrina Evacuation |
| 1999-09-01 | EM-3140 | Fire | Ca-Wildfires-08/25/1999 |
| 1997-01-04 | DR-1155 | Severe Storm | Severe Storms, Flooding, Mud and Landslides |
| 1995-03-12 | DR-1046 | Severe Storm | Severe Winter Storms, Flooding Landslides, Mud Flow |
| 1986-02-21 | DR-758 | Flood | Severe Storms & Flooding |
| 1977-01-20 | EM-3023 | Drought | Drought |
| 1969-01-26 | DR-253 | Flood | Severe Storms & Flooding |
| 1964-12-24 | DR-183 | Flood | Heavy Rains & Flooding |
Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.
How many floods has Tuolumne County had?
NOAA's Storm Events Database holds 40 flood or flash flood records for Tuolumne County from 1996 to 2023, on 31 days, with 3 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Tuolumne County ranks 2085th of 2,942 U.S. counties.
The National Flood Insurance Program has paid $309,000 on 20 claims filed in Tuolumne County; the most in one year was 9 in 2023. Claims count insured losses only: uninsured flood damage is not in this file.
The values, year by year
1986: 1 · 1991: 1 · 1996: 1 · 1997: 1 · 1998: 1 · 2010: 3 · 2015: 1 · 2018: 1 · 2019: 1 · 2023: 9; the other years: 0.
Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.
FEMA's modeled risk for Tuolumne County
FEMA's National Risk Index rates Tuolumne County Relatively Moderate overall, with an expected annual loss of $50.6 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.
| Hazard | Risk rating | Expected annual loss | Modeled frequency |
|---|---|---|---|
| Wildfire | Relatively High | $27M | once in about 81 years (modeled) |
| Landslide | Relatively Moderate | $59K | 4.4 a year (modeled) |
| Heat Wave | Relatively Moderate | $2.5M | 3.3 modeled event-days a year |
| Riverine Flooding | Relatively Moderate | $19M | about once a year (modeled) |
| Drought | Relatively Moderate | $595K | 91 modeled event-days a year |
| Lightning | Relatively Moderate | $501K | 20 a year (modeled) |
| Winter Weather | Relatively Moderate | $95K | 33 a year (modeled) |
| Earthquake | Relatively Low | $769K | once in about 58 years (modeled) |
Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.
Counties that share a border with Tuolumne County
Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.
Next
- Tornadoes in CaliforniaEvery California tornado since 1950 and the counties with the most per square mile
- Winter storms in CaliforniaThe state's winter storm records, by county, year and month
- The California recordEvery hazard in the state, its deadliest events and its federal declarations
- FEMA's risk rating for each hazard in Tuolumne CountyThe hazard risk calculator: 18 hazards beside the county's record
- Download Tuolumne County's FEMA declarations (CSV)22 rows: every declaration that named the county, for your own analysis