Daggett County

Population 934 (2025) 697 sq mi

Large wildfires have burned 39,627 acres of Daggett County since 1984, 19th most of 29 counties in Utah; the largest was the Mustang Fire in 2002.

Hazard fingerprint for Daggett County Tornado: 7th percentile. Tropical: 0th percentile. Wildfire: 74th percentile. Flood: 14th percentile. Hail & wind: 5th percentile. Heat: 0th percentile. Cold: 0th percentile. Winter: 0th percentile. TORTROPFIREFLOODSEVEREHEATCOLDWINTER

Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed

2026
  • Tornado damage paths since 19502
  • Wildfire burn scars since 19848

At a glance

The record for Daggett County in eight numbers. Each links to its section below.

Acres burned since 1984

39,627

19th of 29 in Utah

8 large fires; the largest was Mustang, 2002

Details

Tornadoes since 1950

2

19th of 29 in Utah

Fewer than the typical Utah county, which has had 5

Details

Strongest tornado

F0

August 21, 2001, 2.0 mile path

Largest earthquake within 50 mi

5.3magnitude

January 17, 1950, 34.0 miles away

Details

Federal disaster declarations

7

Most recent: Covid-19 Pandemic, 2020

Details

Record high

102°F

July 14, 2002

Details

Record low

−38°F

January 12, 1963

Details

Snowiest season

106.0in

Winter of 1972-73

Tornadoes

About one every 38 years since 1950, none rated F3/EF3 or stronger.

Strongest

August 21, 2001

F0, 2.0 mile path

25 yards wide.

Most recent

Tuesday, August 21, 2001

F0, 2.0 mile path

25 years ago.

Tornadoes by decade Doppler radar era² 1950s: 0 1960s: 0 1970s: 0 1980s: 0 1990s: 1 1 2000s: 1 1 2010s: 0 2020s: 0 1950s1960s1970s1980s1990s2000s2010s2020s
Recorded tornadoes per decade. The 2020s are incomplete.
Tornadoes by month J: 0 F: 0 M: 0 A: 0 M: 1 1 J: 0 J: 0 A: 1 S: 0 O: 0 N: 0 D: 0 JFMAMJJASOND
By month of occurrence, all years.

Every recorded tornado

Tornadoes in Daggett County since 1950
Aug 21, 2001F02.02500
May 5, 1999F01.03000
  1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Daggett 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.

Hurricanes and tropical storms

No tropical storm or hurricane has tracked within 100 miles since records began in 1851.

Wildfire and smoke

39,627 acres burned in 8 large fires since 1984, equal to 8.9% of the land.

Largest

June 30, 2002

Mustang Fire, 20,599 acres

20,606 acres inside Daggett County.

Most recent

August 3, 2020

Richard Mtn Fire

7,805 acres in total.

Acres burned since 1984, cumulative 1985: 5,0591988: 1,9242002: 20,6062004: 4002005: 4,1282006: 1,1282018: 2,5832020: 3,798 39,627 acres 198519901995200020052010201520202025
Running total of acres burned inside the county (line) and each year’s acres (bars).

Every large fire

Large wildfires since 1984
Richard Mtn20203,7977,805
Bender Mountain20182,5823,792
Pot Hole20061,1281,390
Sheep Creek Wfu20054,1284,128
Mail Draw20044002,603
Mustang200220,60620,599
Green River19881,9241,925
Weyman19855,0585,055
  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

Smokiest year

2021: 51 days

Heavy smoke on 22 days in 2021, the most of any year.

Last 10 years

16.0 days a year

Medium or heavy smoke, 2016 to 2025.

2025

15 days

Medium or heavy smoke. 21 so far in 2026.

Days with medium or heavy smoke overhead, by year 2011: 2 2012: 18 2013: 2 2014: 3 2015: 2 2016: 5 2017: 9 2018: 25 2019: 3 2020: 24 2021: 51 51 2022: 9 2023: 4 2024: 15 2025: 15 201120122013201420152016201720182019202020212022202320242025
Days each year on which a satellite-traced plume of medium or heavy smoke covered the county’s population centre, 2011 to 2025.
  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.

Floods and flood insurance

No federal flood insurance claims are recorded for this county.

Flood events since 1996

  • Flash Flood10
  • Heavy Rain2
  • Flood1

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

River crests

Highest river crests above flood stage
May 27, 2022Green River near Greendale15.13−0.27Action
May 30, 2020Green River near Greendale15.13−0.27Action
Jun 15, 2019Green River near Greendale15.05−0.35Action
Jun 19, 2016Green River near Greendale15.01−0.39Action
Jun 7, 2014Green River near Greendale15.00−0.40Action
Mar 30, 2017Green River near Greendale14.92−0.48Below flood stage
May 14, 2015Green River near Greendale14.25−1.15Below flood stage
May 30, 2005Green River near Greendale13.55−1.85Below flood stage
May 29, 2018Green River near Greendale13.48−1.92Below flood stage
May 23, 2006Green River near Greendale13.41−1.99Below flood stage
Jun 22, 2021Green River near Greendale11.82−3.58Below flood stage
May 23, 2003Green River near Greendale11.80−3.60Below flood stage
May 18, 2001Green River near Greendale11.72−3.68Below flood stage
May 27, 1993Green River near Greendale11.66−3.74Below flood stage
May 12, 2004Green River near Greendale11.61−3.79Below flood stage
May 14, 2007Green River near Greendale11.55−3.85Below flood stage
Jun 6, 2008Green River near Greendale11.54−3.86Below flood stage
May 20, 2002Green River near Greendale11.30−4.10Below flood stage
Jun 12, 1989Green River near Greendale10.95−4.45Below flood stage
Sep 3, 1991Green River near Greendale10.85−4.55Below flood stage
May 7, 1984Green River near Greendale9.54−5.86Below flood stage
Feb 4, 1982Green River near Greendale6.33−9.07Below flood stage
Feb 12, 1985Green River near Greendale6.32−9.08Below flood stage
Apr 6, 1981Green River near Greendale6.05−9.35Below flood stage

River gauges

River gauges and their highest listed crests
Green River near Greendale15.415.13 ftMay 27, 20220
  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.

Drought

In severe drought or worse for 248 of 1,581 months since 1895 (16%); the longest spell lasted 28 months.

248

Months in severe drought or worse since 1895

114

Months in extreme drought

16%

Share of all months, severe or worse

Lowest reading

July 2026

−8.36, extreme drought

Longest severe spell

28 months

April 2012 to July 2014.

Latest month

September 2026

−6.15, extreme drought

Months in severe drought or worse, by year 1895: 0 1896: 0 1897: 0 1898: 0 1899: 0 1900: 0 1901: 0 1902: 9 1903: 0 1904: 0 1905: 0 1906: 0 1907: 0 1908: 0 1909: 0 1910: 0 1911: 1 1912: 1 1913: 0 1914: 0 1915: 3 1916: 0 1917: 0 1918: 0 1919: 6 1920: 0 1921: 0 1922: 0 1923: 0 1924: 0 1925: 0 1926: 0 1927: 0 1928: 0 1929: 0 1930: 2 1931: 6 1932: 0 1933: 0 1934: 10 1935: 5 1936: 1 1937: 0 1938: 0 1939: 0 1940: 1 1941: 0 1942: 0 1943: 5 1944: 0 1945: 0 1946: 2 1947: 0 1948: 0 1949: 0 1950: 0 1951: 6 1952: 0 1953: 0 1954: 10 1955: 4 1956: 7 1957: 0 1958: 1 1959: 0 1960: 0 1961: 1 1962: 1 1963: 12 12 1964: 5 1965: 0 1966: 0 1967: 0 1968: 0 1969: 0 1970: 0 1971: 0 1972: 0 1973: 0 1974: 0 1975: 0 1976: 0 1977: 11 1978: 0 1979: 0 1980: 0 1981: 0 1982: 0 1983: 0 1984: 0 1985: 0 1986: 0 1987: 0 1988: 5 1989: 10 1990: 12 1991: 3 1992: 0 1993: 0 1994: 0 1995: 0 1996: 0 1997: 0 1998: 0 1999: 0 2000: 2 2001: 0 2002: 12 2003: 12 2004: 7 2005: 0 2006: 4 2007: 6 2008: 4 2009: 5 2010: 0 2011: 0 2012: 9 2013: 12 2014: 7 2015: 2 2016: 0 2017: 0 2018: 7 2019: 0 2020: 0 2021: 2 2022: 0 2023: 0 2024: 0 2025: 8 18951905191519251935194519551965197519851995200520152025
Months each year with a Palmer index of −3 or lower, 1895 to 2025. Twelve means the whole year.
  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.

Earthquakes and landslides

10 earthquakes of magnitude 4 or more within 50 miles since 1900; the largest was magnitude 5.3 in 1950.

3

Magnitude 2.5+ inside the county since 1973

80

Magnitude 3+ within 50 miles since 1973

10

Magnitude 4+ within 50 miles since 1900

2

Magnitude 5+ within 50 miles since 1900

Largest within 50 miles

January 17, 1950

Magnitude 5.3

23 km NW of Altamont, Utah; 34.0 miles away.

Most recent, magnitude 3 or more

October 30, 2026

Magnitude 3.1

3 km NW of Little America, Wyoming; 40.2 miles away.

Earthquakes of magnitude 3 or more within 50 miles, by year 1973: 0 1974: 0 1975: 0 1976: 0 1977: 5 1978: 0 1979: 1 1980: 0 1981: 0 1982: 0 1983: 1 1984: 1 1985: 2 1986: 0 1987: 1 1988: 1 1989: 0 1990: 1 1991: 2 1992: 1 1993: 1 1994: 1 1995: 5 1996: 0 1997: 0 1998: 0 1999: 1 2000: 5 2001: 0 2002: 0 2003: 0 2004: 0 2005: 0 2006: 1 2007: 2 2008: 1 2009: 1 2010: 0 2011: 0 2012: 0 2013: 1 2014: 2 2015: 2 2016: 2 2017: 3 2018: 1 2019: 2 2020: 1 2021: 0 2022: 0 2023: 0 2024: 2 2025: 13 13 19731978198319881993199820032008201320182023
Per year, 1973 to 2025.

Every earthquake of magnitude 4 or more within 50 miles

Earthquakes of magnitude 4 or more within 50 miles
Jan 22, 20264.746.09.140 km S of Evanston, Wyoming
Sep 10, 20254.121.142.510 km W of Maeser, Utah
May 25, 20164.040.99.815 km NNE of Tabiona, Utah
Jan 30, 20004.237.23.38 km ESE of Little America, Wyoming
May 20, 19954.132.62.3434km E of Wendover, Utah
Mar 20, 19954.535.5-1.610 km NNW of Rangely, Colorado
Oct 11, 19774.834.33.722 km NW of Altamont, Utah
Sep 30, 19775.030.63.121 km NW of Altamont, Utah
Jan 17, 19505.334.0—23 km NW of Altamont, Utah
Jul 25, 19104.036.9—Near Rock Springs, Wyoming
  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.

Mapped landslides

104

Landslides mapped, probable or better

0

With a recorded date

1

Source inventory

Mapped by UT GRC (104).

  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.

Severe weather and other events

44 events in the National Weather Service record, 43 of them since 1996.

9

Hail reports, 1 inch or larger

0

Hail, 2 inches or larger

4

Damaging gusts, 58 mph+

0

Winter weather events since 1996

0

Heat events since 1996

0

Cold events since 1996

Largest hail

August 15, 1980

1.75 inches

Strongest measured or estimated gust

June 16, 2015

81 mph

More event types since 1996

Other Storm Events types since 1996
Lightning1011Jul 22, 2016

Costliest events since 1996

  1. Aug 26, 2014Flash Flood$100,000
    National Weather Service narrative

    Heavy rainfall fell in the Brown's Park basin lead to flash flooding in the John Jarvie Ranch and Red Creek areas. Over ten miles of paved and dirt roads were damaged with many washed out sections. A coffer dam failed, and water over two feet deep flowed across one road. The normally small Red Creek became a raging river.

  2. Aug 6, 2009Hail$80,000
    National Weather Service narrative

    Golfball sized hailstones dented vehicles and broke windshields and headlights traveling along highway 191 in the eastern Uinta Mountains.

  3. Jul 22, 2008Flash Flood$75,000
    National Weather Service narrative

    Flash flooding caused debris and water to flow over Highway 43 between mile markers 2 and 3. Several inches of water was also reported running across Highway 44. Big rocks also fell across roadways near Sheep Creek. A lot of debris flowed into nearby canals, and the Sheep Creek irrigation canal overflowed. A dirt road to Sols Canyon was washed out, as well as E. 3rd Road in Manila, and a settling pond was also washed out. Flooding also damaged several fields of crops, fences, landscaping, and irrigation systems. Water and mud entered a church basement and garages of some residences. Hail also caused crop damage. Rainfall of 2 inches in 1 hour was reported.

  4. Jul 1, 2002Wildfire$50,000
    National Weather Service narrative

    This human caused fire became known as the Mustang Fire. Three outbuildings and one other structure were destroyed, and highway 191 was temporarily closed. The Flaming Gorge Dam and Power Plant were threatened by the fire. The fire consumed 20,038 acres. The cost of fighting the fire was 2.5 million dollars.

  5. Jul 15, 2004Hail$30,000
    National Weather Service narrative

    A mobile home park appeared to take the brunt of the large hail, with many dents in trailers and vehicles, as well as a broken car windshield.

  6. Jul 15, 2004Flash Flood$30,000
    National Weather Service narrative

    Heavy rain and hail fell in a short period of time, causing fast moving water over a foot deep to flow through town. A large amount of road base was washed away in a new construction area, and roads were washed out up to 4 feet deep. Mud and water also flowed into a few garages and residences. 1.60 inches of rain was measured at the official cooperative weather station in Manila, most of which fell in less than an hour.

  7. Aug 6, 2009Hail$20,000
    National Weather Service narrative

    Fast moving hailstones up to the size of ping pong balls broke windows, dented vehicles, and damaged siding on residences.

  8. Jun 20, 2004Lightning$2,000
    National Weather Service narrative

    Lightning struck a water treatment plant and damaged equipment, resulting in the water treatment plant being out of service for several days.

  9. Jul 29, 1996Flash Flood$2,000
    National Weather Service narrative

    A section of the Birch Creek Road was washed out by a flash flood.

  10. Sep 5, 2007Flash Flood$2,000
    National Weather Service narrative

    A flash flood with water at least five feet deep ran down an arroyo and across Browns Park Road, about three miles east of the intersection of Red Creek and Browns Park Road. There was some erosion damage to the road and a section of wood fence upstream was torn out and carried down to the road. Road crews repaired the road and cleared out debris from the culverts the next day.

  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.

Weather records

From Flaming Gorge, 13.3 miles from the county’s population centre, with records from 1957.

All-time high
102°FJul 14, 2002
All-time low
−38°FJan 12, 1963
Warmest night
70°F3 times, most recently Jul 23, 2007
Coldest day
−9°FDec 21, 1990
Wettest day
3.37 inOct 8, 1961
Snowiest day
24.0 inOct 8, 1961
Hottest year
2012mean 48.7°F
Coldest year
1973mean 41.9°F
Wettest year
198318.00 in
Driest year
19586.89 in
Snowiest season
106.0 in1972-73
Average monthly high and low temperature and precipitation, last 30 years, Flaming Gorge 32°F 37° 12° 0.4 Jan 40° 15° 0.5 Feb 50° 22° 0.7 Mar 57° 28° 1.0 Apr 68° 37° 0.8 May 80° 45° 0.9 Jun 88° 52° 0.7 Jul 85° 51° 1.1 Aug 76° 42° 1.3 Sep 62° 32° 1.1 Oct 47° 22° 0.4 Nov 37° 13° 0.5 Dec Precipitation, inches
Average daily high and low by month, and average monthly precipitation, over the last 30 years.
Days reaching 95°F per year 1976: 0 1977: 0 1978: 2 1979: 2 1980: 0 1981: 0 1982: 1 1983: 0 1984: 0 1985: 1 1986: 0 1987: 0 1988: 4 1989: 9 1990: 4 2001: 11 2002: 14 2004: 1 2005: 10 2006: 9 2007: 10 2008: 3 2009: 1 2010: 1 2011: 0 2012: 2 2013: 7 2014: 8 2015: 3 2016: 2 2017: 1 2019: 1 2020: 11 2021: 17 17 2022: 10 2023: 2 2024: 5 2025: 2 1976198620072017
Days reaching 95°F each complete year, last 50 years. Thirty-year average: 5.7.
Snowfall by winter 1976: 62.7 in 1977: 25.6 in 1979: 87.7 in 1980: 50.9 in 1981: 50.4 in 1982: 49.3 in 1983: 94.9 in 1984: 61.3 in 1985: 50.5 in 1986: 17.1 in 1987: 70.8 in 1988: 74.3 in 1989: 58.4 in 1990: 71.6 in 1991: 45.0 in 1992: 87.9 in 1993: 54.6 in 1994: 43.6 in 1995: 41.3 in 1996: 66.4 in 1997: 63.5 in 1998: 20.4 in 1999: 15.3 in 2000: 23.1 in 2001: 24.7 in 2002: 17.4 in 2006: 48.5 in 2008: 33.3 in 2009: 34.0 in 2010: 45.0 in 2011: 36.5 in 2019: 49.6 in 2021: 50.3 in 2022: 102.0 in 102.0 2023: 31.1 in 2024: 23.5 in 2025: 4.4 in 1976198719972011
Total snowfall each winter (July to June), last 50 winters.

Median first snow

October 26

Earliest: September 17, 1996

Median last snow

April 23

Latest: June 1, 1990

0 of 47 winters had no measurable snow.

Station Flaming Gorge (USC00422864), 6,315 ft elevation, 13.3 miles from the population centre. Daily records from 1957 to September 30, 2026; 94.5% 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.

Federal disaster declarations

7 since 1953. The most recent: Covid-19 Pandemic, April 4, 2020.

Federal disaster declarations
Apr 4, 2020BiologicalCovid-19 PandemicMajor disasterDR-4525-UT
Mar 13, 2020BiologicalCovid-19EmergencyEM-3478-UT
Aug 8, 2011FloodFloodingMajor disasterDR-4011-UT
Sep 5, 2005Coastal StormHurricane Katrina EvacuationEmergencyEM-3223-UT
Jul 1, 2002FireUt - Mustang Fire - 07/01/2002Fire managementFM-2437-UT
Apr 30, 1983FloodSevere Storms, Landslides & FloodingMajor disasterDR-680-UT
Jan 20, 1977DroughtDroughtEmergencyEM-3024-UT

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.

How this compares

Where Daggett County stands among 29 counties in Utah and 3,143 in the United States.

Ranks
Tornadoes since 1950219 / 292,866 / 3,143
Tornadoes rated F3/EF3 or stronger0——
Tropical cyclones within 50 mi0——
Hurricane-strength passes within 50 mi0——
Wildfire acres since 198439,62719 / 29511 / 3,143
Flood insurance claims0——
Flood insurance paid$0——
Disaster declarations720 / 292,981 / 3,143
Flood events since 19961322 / 292,802 / 3,143
Hail and wind events since 19962527 / 293,066 / 3,143
Winter storm events since 19960——
Reported damage since 1996$397,00029 / 293,050 / 3,143
River crests at major flood stage0——
High tide flooding days a year, last 10 years0.0——
Months in severe drought since 18952482 / 29103 / 3,143
Medium or heavy smoke days a year, last 10 years16.04 / 291,459 / 3,143
Earthquakes M4+ within 50 mi since 19001027 / 29401 / 3,143
Earthquakes M2.5+ in the county since 1973328 / 29583 / 3,143

Neighbouring counties

Neighbouring counties
Duchesne County50202,8896
Moffat County CO70283,4660
Summit County0034,89846
Sweetwater County WY260103,04822
Uintah County8082,81714

Sources and vintage

Every number on this page comes from these public records.

  • 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 USC00422864.
  • 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.
  • 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.