Roy

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
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.

Flood insurance figures are for Weber County, the county that contains Roy.

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 in Weber County, the county that contains Roy.

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.

The drought index is for Weber County, the county that contains Roy.

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 city centre.
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

Landslides mapped in Weber County.

Mapped by UT GRC (1,524), USGS Conterminous (157), NASA (5).

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. Dec 1, 2011High Wind, Northern Wasatch Front$82.0 million
   National Weather Service narrative

   A strong and destructive downslope windstorm impacted the northern Wasatch Front, with maximum recorded wind gusts of 102 mph in Centerville, 92 mph in West Bountiful, 86 mph in Farmington, and numerous other reports in the 60 to 80 mph range.||Damage from this windstorm was substantial and widespread, with the most extensive damage occurring between North Salt Lake and South Ogden. UDOT reported that 11 semitrailers were knocked over along I-15, which eventually led them to close the road to semis for several hours. In Fruit Heights, a steeple was blown off the roof of a church. Hundreds of trees, power lines, and light poles were knocked over, and some of these caused additional…

2. Sep 8, 2020High Wind, Northern Wasatch Front$4.3 million
   National Weather Service narrative

   A historic downslope wind event unfolded along the Northern Wasatch Front. The peak wind gust for the event, not only in this zone, but across the state, was a 99 mph peak wind gust recorded by the US-89 at Park Lane sensor. Other notable peak wind gusts included 97 mph at Farmington, 84 mph at Hill Air Force Base, 82 mph in North Brigham City, 75 mph at Brigham City Regional Airport, 75 mph at Centerville, and 64 mph at Ogden-Hinckley Airport. Extensive wind damage was reported along the entire Wasatch Front, with widespread downed trees, damaged roofs and power outages. Transportation was heavily impacted with all major north-south (Interstate 15, Interstate 84, and U.S. Highway…

3. Sep 22, 2016Tornado$2.0 million
   National Weather Service narrative

   A tornado touched down in Riverdale in Weber County. The tornado moved rapidly to the northeast, but was not consistently on the ground. It skipped on several occasions in Riverdale, producing primarily EF0 damage to trees and a several homes. The tornado then produced a more continuous swath of damage through Washington Terrace producing EF1 damage to numerous homes, structures, as well as many trees. Finally, the tornado skipped briefly into South Ogden producing EF0 damage before dissipating. One person suffered a head injury and took private transportation to a hospital. A few others were cut by flying glass, but were not hospitalized. The many downed trees across the area…

4. Apr 1, 2023Heavy Snow, Wasatch Back$1.0 million
   National Weather Service narrative

   A snowfall accumulation of 15.3 inches with 0.83 inches of snow water equivalent was observed at Wanship. Other snowfall observations include 12.8 inches with 0.76 inches of snow water equivalent at Oakley and 12.5 inches with 0.92 inches of snow water equivalent at Eden-Liberty. Three structural collapses occurred on April 3 in Park City. The first involved a garage, the second was a chimney, and the third was related to the home.

5. May 1, 2016High Wind, Northern Wasatch Front$1.0 million
   National Weather Service narrative

   Damage from the downslope wind storm was widespread across Davis and Weber Counties, as well as parts of Box Elder County, with the strongest observed winds occurring in Centerville and Farmington. Peak recorded wind gusts from the event included 91 mph at the US-89 at Park Lane sensor, 87 mph in Farmington, 81 mph in Centerville, 74 mph at the Brigham City Airport, 70 mph in South Ogden, and many other reports in the 55-70 mph range.||There was one wind-related fatality, when strong winds pushed a pickup truck onto the shoulder of Interstate 15, where it it had been traveling near Parrish Lane. The pickup crashed into the back of a semitruck, which had pulled over to the side of…

6. Apr 30, 2016High Wind, Northern Wasatch Front$1.0 million
   National Weather Service narrative

   Damage from the downslope wind storm was widespread across Davis and Weber Counties, as well as parts of Box Elder County, with the strongest observed winds occurring in Centerville and Farmington. Peak recorded wind gusts from the event included 91 mph at the US-89 at Park Lane sensor, 87 mph in Farmington, 81 mph in Centerville, 74 mph at the Brigham City Airport, 70 mph in South Ogden, and many other reports in the 55-70 mph range.||There was one wind-related fatality, when strong winds pushed a pickup truck onto the shoulder of Interstate 15, where it it had been traveling near Parrish Lane. The pickup crashed into the back of a semitruck, which had pulled over to the side of…

7. Sep 5, 2017Wildfire, Northern Wasatch Front$849,000
   National Weather Service narrative

   The Uintah Fire started on September 5 near the mouth of Weber Canyon. The fire was sparked by a downed power line and spread rapidly due to strong easterly canyon winds in the area, eventually burning 619 acres. More than 900 people were evacuated from their homes in the cities of Uintah and South Weber on September 5 before being allowed to return by September 7. The fire destroyed three homes and damaged two other homes and a mixed-use property. In total, the fire destroyed or damaged 18 structures. The estimated damage was $849,000, with operational costs to fight the fire at around $273,000. The fire was contained on September 10.

8. May 29, 1996Tornado$600,000
   National Weather Service narrative

   Another severe thunderstorm in Weber County spawned a stronger F1 tornado. Experts estimated winds were between 73-112 mph (63-97 kts) based on the damage they inspected. The tornado touched down on the west side of Washington Boulevard at 2100 North. It then travelled east along the north side of Washington Blvd. for approximately 1.25 miles. Two homes sustained major damage from trees falling on them. Parked automobiles at the Health Spa on Washington Blvd. were pushed sideways and 1 car received major damage due to flying debris. Numerous mature trees were downed in the twister's wake. Amazingly only one person sustained slight injuries to her face when windows broke in on her.…

9. May 22, 2011Flood$550,000
   National Weather Service narrative

   Flooding occurred along the South Fork of the Ogden River through the end of May, with the gauge near Huntsville reaching a peak of 1417 cfs on May 24th. This flooding impacted campgrounds and summer homes near Huntsville. In addition, flooding did major damage to Old Snow Basin Road, which officials estimated would take $500,000 to repair.

10. Feb 16, 2026Winter Storm, Wasatch Mountains I-80 North$500,000
    National Weather Service narrative

    A powerful winter storm brought heavy snow and strong winds to the area. Reported snow observations include 27 inches of snow in the Logan Mountains (3.1 inches water), 23 inches of snow at Powder Mountain (2.5 inches water), and 18 inches of snow at Snowbasin - Base (1.9 inches of water). Additionally, several SNOTEL stations including Lightning Ridge, Ben Lomond Peak, and Monte Cristo recorded from 1.6 to 2.7 inches of snow water equivalent, resulting in approximately 21 to 37 inches of snow. Some peak wind gust observations through the event include 97 mph at Snowbasin - Straw Top, 78 mph at Snowbasin - Strawberry Tower 15, and 76 mph at Ogden Peak. Inclement conditions also…

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

106°F3 times, most recently Jul 12, 2024

All-time low

−13°FJan 25, 1949

Warmest night

80°F2 times, most recently Jul 27, 2026

Coldest day

10°FJan 6, 2017

Wettest day

3.36 inAug 4, 1951

Hottest year

2024mean 57.0°F

Coldest year

1951mean 49.5°F

Wettest year

194922.32 in

Driest year

20207.86 in

Station Ogden Hinkley Airport (USW00024126), 4,449 ft elevation, 2.3 miles from the city centre. Daily records from 1948 to October 25, 2026; 94.3% 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.

Declarations for Weber County.

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.

• 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 USW00024126.
• 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.