Sevier County

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Sevier County: 0.
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.

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

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.

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

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.

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 county boundary (or inside the county).
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.

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

Mapped by UT GRC (1,032), USGS Conterminous (4), NASA (2).

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. Jul 14, 2018Flash Flood$1.0 million
   National Weather Service narrative

   Heavy rain caused flash flooding that damaged fields and homes in Richfield, including 260 acres of a 320 acre property used for farming and growing sod.

2. Apr 14, 2015Wildfire, Central Mountains$350,000
   National Weather Service narrative

   The Quakie Haven Fire began near Fish Lake on the afternoon of April 14, and grew quickly due to strong winds. The fire destroyed two summer cabins and damaged several outbuildings and other structures in the Sleepy Hollow area, but fire crews were able to keep the blaze away from other cabins in the area. The fire also forced the temporary closure of portions of State Route 25. Suppression efforts continued for more than a week after the blaze was ignited, but the fire was effectively under control and was no longer threatening structures beginning on the evening of the 14th of April.

3. Jul 1, 2012Wildfire, Central Mountains$250,000
   National Weather Service narrative

   The Clay Springs Fire began on July 27th east of Delta, Utah, and was human-caused. Clay Springs was the largest fire of the year in the state of Utah, burning a total of 107,846 acres before it was 100% contained on July 21st. The fire forced the evacuation of nearly 1,000 people, including the entire communities of Oak City and Fool Creek. Damages from the fire included one cabin that was destroyed, minor damage to a few other residences, 3 city storage structures destroyed, and dozens of power poles damaged. Two firefighters were injured by the blaze. In addition to physical damages, fire suppression cost a total of $6.6 million. Note that this event began in June, and monetary…

4. Jun 1, 2011Flood$150,000
   National Weather Service narrative

   The Sevier River at Sigurd peaked at 1728 cfs on June 1st, then remained above flood stage for more than a week after that as it slowly receded. Many roads across Sevier county continued to be impacted and damaged, including State Road 118 between Joseph and Monroe, the Sevier River Road between Central Valley and Annabella, and Seegmiller Lane near Richfield. In addition, flood waters seeped into about a dozen homes, while threatening more than a dozen others.

5. May 23, 2011Flood$100,000
   National Weather Service narrative

   Flooding occurred along the Sevier River, with the gauge at Sigurd topping flood stage on May 23rd, and slowly rising through the rest of the month with the accelerated snowmelt. This flooding effected low lying roads and bridges, including Sevier River Road and Nebeker Lane. Both of these roads were closed for several weeks, and Nebeker Lane suffered severe damage due to the flood waters. Note that this event continued into June.

6. Mar 17, 2014High Wind, Castle Country$80,000
   National Weather Service narrative

   Strong winds in Emery County caused damage in several locations from Huntington to Ferron. Damages included many fences that were blown down, multiple traffic signs bent or broken, and significant damage to at least one roof. In addition, at least one parked trailer was flipped over, and multiple power transmission lines were damaged, resulting in a power outage for around 2,500 people. The top recorded wind gust in this part of the state was 54 mph at Carbon County Regional Airport/Buck Davis Field.

7. Feb 17, 2026Winter Storm, Central Mountains$70,000
   National Weather Service narrative

   Several SNOTEL stations including Seely Creek, Upper Joes Valley, and Red Pine Ridge recorded from 0.9 to 1.5 inches of snow water equivalent, resulting in approximately 12 to 21 inches of snow. Some peak wind gust observations through the event include 84 mph at Signal Peak, 80 mph at Scipio Summit, and 76 mph at Bull Claim Hill. Multiple vehicle accidents and slide-offs were also reported along I-70.

8. Mar 29, 2009High Wind, Castle Country$50,000
   National Weather Service narrative

   Strong winds knocked down several trees and power lines in the Price area.

9. Mar 18, 2025High Wind, Castle Country$25,000
   National Weather Service narrative

   A period of strong post-frontal winds were observed in terrain adjacent locations in Castle Country. The Emery County EM reported that in the town of Emery 2 houses lost roofing materials, 1 house lost its roof, and in one location approximately 50 ft of vinyl fence was blown over. The EM also reported that there were overturned semi trucks on I-70 in this time period, likely due to the strong winds. The MUDDY CREEK NEAR EMERY 4N mesonet station recorded a peak gust of 57 mph at 1:15 PM MST. The FREMONT JUNCTION mesonet station recorded a peak gust of 73 mph at 11:30 PM MST, and also observed several hours of winds roughly gusting in the 60-70 mph range.

10. Aug 26, 1996Flash Flood$20,000
    National Weather Service narrative

    Monsoonal moisture continued to allow thunderstorms to dump copious amounts of rain across southern Utah. During the early afternoon a couple of thunderstorms moved through Sevier county. A weather spotter in Freemont Junction received 2.02" in 65 minutes. Both the spotter and county sheriff reported some flooding in town with all washes in the area running full. The Utah Highway Patrol reported that 6-8" of water on the road temporarily closing Interstate-70 near Muddy Creek.

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

107°FJul 5, 2023

All-time low

−33°F2 times, most recently Feb 7, 1989

Warmest night

79°FJul 3, 1913

Coldest day

−3°FDec 23, 1990

Wettest day

2.40 inDec 12, 1906

Snowiest day

16.0 inMar 15, 1945

Hottest year

1934mean 53.4°F

Coldest year

1973mean 45.4°F

Wettest year

193613.00 in

Driest year

19001.82 in

Snowiest season

62.0 in2009-10

Station Richfield Radio Ksvc (USC00427260), 5,285 ft elevation, 1.9 miles from the population centre. Daily records from 1893 to August 31, 2026; 93.6% 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.

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.

Neighbouring counties

• 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 USC00427260.
• 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.
• 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.