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 Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed
- 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.
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.
Every recorded tornado
| Aug 21, 2001 | F0 | 2.0 | 0 | 0 |
| May 5, 1999 | F0 | 1.0 | 0 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Daggett County: 0.
- 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.
Every large fire
| Richard Mtn | 2020 | 3,797 | 7,805 |
| Bender Mountain | 2018 | 2,582 | 3,792 |
| Pot Hole | 2006 | 1,128 | 1,390 |
| Sheep Creek Wfu | 2005 | 4,128 | 4,128 |
| Mail Draw | 2004 | 400 | 2,603 |
| Mustang | 2002 | 20,606 | 20,599 |
| Green River | 1988 | 1,924 | 1,925 |
| Weyman | 1985 | 5,058 | 5,055 |
- 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.
- 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
| May 27, 2022 | Green River near Greendale | 15.13 | −0.27 |
| May 30, 2020 | Green River near Greendale | 15.13 | −0.27 |
| Jun 15, 2019 | Green River near Greendale | 15.05 | −0.35 |
| Jun 19, 2016 | Green River near Greendale | 15.01 | −0.39 |
| Jun 7, 2014 | Green River near Greendale | 15.00 | −0.40 |
| Mar 30, 2017 | Green River near Greendale | 14.92 | −0.48 |
| May 14, 2015 | Green River near Greendale | 14.25 | −1.15 |
| May 30, 2005 | Green River near Greendale | 13.55 | −1.85 |
| May 29, 2018 | Green River near Greendale | 13.48 | −1.92 |
| May 23, 2006 | Green River near Greendale | 13.41 | −1.99 |
| Jun 22, 2021 | Green River near Greendale | 11.82 | −3.58 |
| May 23, 2003 | Green River near Greendale | 11.80 | −3.60 |
| May 18, 2001 | Green River near Greendale | 11.72 | −3.68 |
| May 27, 1993 | Green River near Greendale | 11.66 | −3.74 |
| May 12, 2004 | Green River near Greendale | 11.61 | −3.79 |
| May 14, 2007 | Green River near Greendale | 11.55 | −3.85 |
| Jun 6, 2008 | Green River near Greendale | 11.54 | −3.86 |
| May 20, 2002 | Green River near Greendale | 11.30 | −4.10 |
| Jun 12, 1989 | Green River near Greendale | 10.95 | −4.45 |
| Sep 3, 1991 | Green River near Greendale | 10.85 | −4.55 |
| May 7, 1984 | Green River near Greendale | 9.54 | −5.86 |
| Feb 4, 1982 | Green River near Greendale | 6.33 | −9.07 |
| Feb 12, 1985 | Green River near Greendale | 6.32 | −9.08 |
| Apr 6, 1981 | Green River near Greendale | 6.05 | −9.35 |
River gauges
| Green River near Greendale | 15.4 | 15.13 ft | 0 |
- 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
- 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
Most recent, magnitude 3 or more
October 30, 2026
Magnitude 3.1
3 km NW of Little America, Wyoming; 40.2 miles away.
Every earthquake of magnitude 4 or more within 50 miles
| Jan 22, 2026 | 4.7 | 46.0 |
| Sep 10, 2025 | 4.1 | 21.1 |
| May 25, 2016 | 4.0 | 40.9 |
| Jan 30, 2000 | 4.2 | 37.2 |
| May 20, 1995 | 4.1 | 32.6 |
| Mar 20, 1995 | 4.5 | 35.5 |
| Oct 11, 1977 | 4.8 | 34.3 |
| Sep 30, 1977 | 5.0 | 30.6 |
| Jan 17, 1950 | 5.3 | 34.0 |
| Jul 25, 1910 | 4.0 | 36.9 |
- 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).
- 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).
- 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
| Lightning | 10 | 1 |
Costliest events since 1996
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Jul 29, 1996Flash Flood$2,000
National Weather Service narrative
A section of the Birch Creek Road was washed out by a flash flood.
- 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.
- 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
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.
| Apr 4, 2020 | Biological | DR-4525-UT |
| Mar 13, 2020 | Biological | EM-3478-UT |
| Aug 8, 2011 | Flood | DR-4011-UT |
| Sep 5, 2005 | Coastal Storm | EM-3223-UT |
| Jul 1, 2002 | Fire | FM-2437-UT |
| Apr 30, 1983 | Flood | DR-680-UT |
| Jan 20, 1977 | Drought | EM-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.
| Tornadoes since 1950 | 2 | 19 / 29 |
| Tornadoes rated F3/EF3 or stronger | 0 | — |
| Tropical cyclones within 50 mi | 0 | — |
| Hurricane-strength passes within 50 mi | 0 | — |
| Wildfire acres since 1984 | 39,627 | 19 / 29 |
| Flood insurance claims | 0 | — |
| Flood insurance paid | $0 | — |
| Disaster declarations | 7 | 20 / 29 |
| Flood events since 1996 | 13 | 22 / 29 |
| Hail and wind events since 1996 | 25 | 27 / 29 |
| Winter storm events since 1996 | 0 | — |
| Reported damage since 1996 | $397,000 | 29 / 29 |
| River crests at major flood stage | 0 | — |
| High tide flooding days a year, last 10 years | 0.0 | — |
| Months in severe drought since 1895 | 248 | 2 / 29 |
| Medium or heavy smoke days a year, last 10 years | 16.0 | 4 / 29 |
| Earthquakes M4+ within 50 mi since 1900 | 10 | 27 / 29 |
| Earthquakes M2.5+ in the county since 1973 | 3 | 28 / 29 |
Neighbouring counties
| Duchesne County | 5 | 0 |
| Moffat County CO | 7 | 0 |
| Summit County | 0 | 0 |
| Sweetwater County WY | 26 | 0 |
| Uintah County | 8 | 0 |
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.