Carbon County

Every recorded tornado

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

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.

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 (222), USGS Conterminous (52), NASA (1).

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 1, 2018Wildfire, Wasatch Plateau/Book Cliffs$25.0 million
   National Weather Service narrative

   The Dollar Ridge Fire was a human caused wildfire that began during the afternoon of July 1. The fire burned 68,869 acres and destroyed 363 structures, including 74 homes. Costs to fight the fire were approximately $18 million. At the height of the fire, approximately 1,100 people were evacuated from communities in Wasatch and Duchesne Counties. Note that this event continued into August.

2. Aug 1, 2018Wildfire, Wasatch Plateau/Book Cliffs$25.0 million
   National Weather Service narrative

   The Dollar Ridge Fire was a human caused wildfire that began during the afternoon of July 1. The fire burned 68,869 acres and destroyed 363 structures, including 74 homes. Costs to fight the fire were approximately $18 million, though rehabilitation efforts were projected to add significantly to the cost. At the height of the fire, approximately 1,100 people were evacuated from communities in Wasatch and Duchesne Counties. The fire was considered effectively contained on August 31, at 94% containment. Note that this event began in July.

3. Sep 22, 2016Flash Flood$4.0 million
   National Weather Service narrative

   Multiple rounds of heavy rainfall brought widespread flooding to Carbon County. Significant flooding occurred in Wellington near 100 East, and severe damage was reported to approximately 10 homes. In Carbonville, the Pilling Trailer Park received extensive flooding, forcing the evacuation of 80 different mobile homes. Flooding also occurred in Sunnyside, with widespread street flooding causing manhole covers to pop up across the city. The Price River also experienced significant flooding, with flow along the river jumping from the normal flow of less than 10 cfs to greater than 8,000 cfs. In total across the county, flooding damaged over 140 private homes, several businesses, and…

4. Aug 4, 2014Flash Flood$2.8 million
   National Weather Service narrative

   Widespread flash flooding occurred across Carbon County, with damaging floods reported in Helper, Price, Carbonville, Kenilworth, Spring Glen, and Westwood. Damage to public infrastructure totaled $500,000, including damage to bridges, culverts, and roads. Over 100 homes received at least some flood damage, with most of the flooding occurring in basements, yards, driveways, and garages. Damages to these homes totaled in excess of $2 million.

5. Sep 27, 2014Flash Flood$1.1 million
   National Weather Service narrative

   Widespread flash flooding once again occurred in Carbon County, with significant flooding reported in Carbonville, Helper, Kenilworth, Price, and Wellington. The hardest hit area was the Piling's Trailer Court, where at least 24 homes were damaged or destroyed. In total across the county, 53 homes were damaged, including 22 that were declared completely destroyed. In addition, a sewage treatment plant was shut down when it was inundated with 4 feet of water and leaked into the Price River; the damage estimate for the treatment plant was $75,000. Street flooding was widespread across the area, and the Price River overflowed its banks at multiple locations.

6. Jul 1, 2012Wildfire, Wasatch Plateau/Book Cliffs$900,000
   National Weather Service narrative

   The Church Camp Fire began on June 24th, approximately 22 miles south of Duchesne, Utah. The cause of the fire is unknown, but it was believed to be human-caused. The fire caused the evacuation of Argyle Canyon, a popular summer cabin and recreation area. A total of 7,211 acres were burned before the fire was 100% contained on July 7th. Three injuries to firefighters were reported, with one back injury and two heat-related injuries. The fire destroyed 15 cabins and 78 other non-residential buildings. In addition to the property damage, fire suppression costs totaled $12.2 million. Note that this event began in June, and monetary property damage listed here is for the entire event.

7. Sep 12, 2002Flash Flood$500,000
   National Weather Service narrative

   A cloudburst (1.48 inches in an hour) produced flash flooding in Sunnyside. City Hall was flooded with water up to 3 feet deep, and numerous homes and businesses were flooded.

8. Jun 21, 2002Thunderstorm Wind$300,000
   National Weather Service narrative

   Severe thunderstorm winds hit the area near Price, with most damage reported in Miller Creek. The strongest recorded wind was 58 mph (50 kts) at the Price Airport. However, 4 miles to the south in Miller Creek, the winds lifted a mobile home off its foundation and destroyed the structure. A roof was torn off another home and onto another. causing heavy damage. A horse was killed by flying debris. A total of 12 houses were damaged, along with a barn and a corral.

9. Mar 20, 2000High Wind, Wasatch Plateau/Book Cliffs$200,000
   National Weather Service narrative

   Strong downslope winds developed overnight across Weber County. Wind gusts estimated at 115mph (100kts) tore the roofs off of 3 condominiums in South Ogden. Major damage was also caused to the interiors of these condos, along with some toppled garage doors, a toppled brick wall, and a damaged fence nearby. Miraculously, nobody was seriously injured. Damage estimates to the area was just over 1 million dollars. These same downslope winds also caused an estimated 70 thousand dollars damage to the roof of Wasatch Hall on the campus of Weber State University, and several thousand dollars in damage due to scattered losses of fences, shingles and trees in the Ogden area. These same…

10. Oct 29, 2024Winter Weather, Wasatch Plateau/Book Cliffs$150,000
    National Weather Service narrative

    A pickup truck collided head-on with a semitrailer after the driver of the pickup truck lost control on state Route 96. Archived liquid precipitation measurements suggest around 0.2-0.5 had fallen in the area by that point, with National Operational Hydrologic Remote Sensing Center data indicating a snow depth of 2-4 inches at the time of the crash.

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 13, 2002

All-time low

−35°FFeb 10, 1933

Warmest night

82°FAug 4, 1902

Coldest day

−8°F3 times, most recently Jan 22, 1937

Wettest day

2.15 inAug 28, 2007

Snowiest day

11.0 inFeb 22, 2022

Hottest year

1994mean 51.9°F

Coldest year

1933mean 41.2°F

Wettest year

196514.28 in

Driest year

19422.39 in

Snowiest season

47.0 in1936-37

Station Castle Dale (USC00421214), 5,629 ft elevation, 30.0 miles from the population centre. Daily records from 1899 to September 30, 2026; 99.2% 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 USC00421214.
• 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.