NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Roy, UT
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Roy, Utah since records began in 1851. Since 1950, 21 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 21
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Roy
The highest rating among the 21 tornadoes within 25 miles is F2, reached 2 times; the most recent, on August 14, 1968, came within 6 miles. Of the 21, 3 had paths within 5 miles of the city centre, and 5 have come since 2000. May has had the most tornadoes, 6. The most recent tornado was on September 2, 2021. Roy has more tornadoes within 25 miles than 77% of the 99 Utah cities on this site. Hail has been reported within 10 miles 27 times since 1978, with stones up to 1.75 inches (golf ball size). Roy has more hail reports within 10 miles than 78% of the 99 Utah cities.
Compare Roy's storm record with another city →
Tornadoes within 25 miles of Roy
By decade
- 2020s2
- 2010s1
- 2000s2
- 1990s11
- 1980s1
- 1970s1
- 1960s2
- 1950s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Aug 14, 1968 | F2 | 6 mi | 1.5 mi | 0 / 1 |
| Jun 3, 1963 | F2 | 22 mi | 2 mi | 0 / 0 |
| Sep 2, 2021 | EF1 | 22 mi | 2.05 mi | 0 / 0 |
| Sep 22, 2016 | EF1 | 2 mi | 2.85 mi | 0 / 5 |
| May 29, 1996 | F1 | 10 mi | 1.3 mi | 0 / 1 |
| Jun 2, 1993 | F1 | 25 mi | 1 mi | 0 / 2 |
| Sep 23, 1992 | F1 | 7 mi | 2 mi | 0 / 0 |
| May 3, 2009 | EF0 | 16 mi | 1 mi | 0 / 0 |
| Aug 2, 2005 | F0 | 8 mi | 5 mi | 0 / 0 |
| Jun 4, 1998 | F0 | 8 mi | 0.1 mi | 0 / 0 |
| May 21, 1998 | F0 | 4 mi | 0.1 mi | 0 / 0 |
| May 21, 1998 | F0 | 2 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 21, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Roy
The Storm Prediction Center has 27 hail reports within 10 miles of Roy since 1978, made on 21 separate days. Of these, 15 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.75 inches (golf ball size), was reported on 2 days, most recently June 7, 2020. The most recent report is from August 13, 2024. August has the most reports, 10.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Roy
The nearest NOAA station with 1991–2020 climate normals is Ogden Hinkley Airport, UT, 3 miles northeast of Roy at 4,470 feet. July is the warmest, with an average high of 91°F and low of 65°F; January is the coolest, at 36°F and 21°F. May is the wettest at 2.2 inches of precipitation on average and July the driest at 0.4 inches; the year adds up to 16.5 inches over 44 days with at least a tenth of an inch. Highs reach 90°F on about 49 days a year, almost all from June to September. Lows fall below freezing on about 121 nights a year. That 16.5 inches is more than at 29 of the 58 Utah stations used on this site (50%). Hill Afb, 4 miles southeast, has its own station (Weber Basin Pump Plt 3, UT): 26.0 inches a year, 9.5 more than here, and a July average high of 92°F against 91°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 36 | 21 | 1.5 | 4 |
| Feb | 42 | 25 | 1.6 | 4 |
| Mar | 53 | 33 | 1.7 | 5 |
| Apr | 60 | 39 | 2.0 | 5 |
| May | 70 | 47 | 2.2 | 5 |
| Jun | 82 | 55 | 1.1 | 3 |
| Jul | 91 | 65 | 0.4 | 1 |
| Aug | 89 | 63 | 0.7 | 2 |
| Sep | 78 | 53 | 1.1 | 3 |
| Oct | 63 | 41 | 1.7 | 4 |
| Nov | 49 | 31 | 1.2 | 3 |
| Dec | 37 | 22 | 1.3 | 4 |
| Year | 62 | 41 | 16.5 | 44 |
Averages for 1991–2020 at Ogden Hinkley Airport, UT (4,470 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Roy
Since 1996, the National Weather Service has logged 99 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Roy: 87 thunderstorm wind reports, 7 floods, 3 lightning strikes and 2 flash floods. They killed 2 people and injured 1, and the NWS estimated $1.0 million in property and crop damage. The strongest thunderstorm gust on record here was 101 mph, on September 22, 2016.
July 19, 2023: thunderstorm wind 4 miles from the centre of Roy — 1 killed, $1,000 damage.
May 1, 2023: flood 8 miles from the centre of Roy — 1 killed.
August 19, 2011: lightning strike 5 miles from the centre of Roy — 1 injured.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Weber County, which includes Roy, has been named in 11 federal disaster or emergency declarations since 1977, 6 of them major disasters (by incident: 4 floods, 2 biological emergencies, 2 fires, 1 coastal storm). The latest major disaster declaration was Straight-Line Winds, on January 12, 2021. FEMA's National Risk Index gives Weber County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for lightning; Relatively Moderate for strong wind and heat waves; Relatively Low for tornadoes and inland flooding; Very Low for hail. It models the county's expected loss from all 18 hazards it covers at $103.9 million a year, the 5th highest of 29 Utah counties; of the hazards above, the largest share, $18.8 million (18%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 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).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets 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).
What counts as a pass, the distances and the sources: how this storm history is built.