NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Herriman, 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 Herriman, Utah since records began in 1851. Since 1950, 17 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 17
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
1 deaths in all
What the records show for Herriman
The highest rating among the 17 tornadoes within 25 miles is F2, reached 2 times; the most recent, on August 11, 1999, came within 20 miles. Of the 17, none had a path within 5 miles of the city centre, and 2 have come since 2000. August has had the most tornadoes, 4. The most recent tornado was on September 7, 2013. Herriman has more tornadoes within 25 miles than 68% of the 99 Utah cities on this site. Hail has been reported within 10 miles 26 times since 1991, with stones up to 1.75 inches (golf ball size). Herriman has more hail reports within 10 miles than 77% of the 99 Utah cities.
Compare Herriman's storm record with another city →
Tornadoes within 25 miles of Herriman
By decade
- 2010s1
- 2000s1
- 1990s8
- 1980s4
- 1970s1
- 1960s2
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Aug 11, 1999 | F2 | 20 mi | 4.3 mi | 1 / 80 |
| Feb 9, 1965 | F2 | 17 mi | 0.1 mi | 0 / 0 |
| May 3, 1993 | F1 | 16 mi | 0.1 mi | 0 / 0 |
| Jul 25, 1991 | F1 | 12 mi | 10 mi | 0 / 0 |
| Jul 8, 1989 | F1 | 12 mi | 0.2 mi | 0 / 0 |
| Mar 2, 1989 | F1 | 15 mi | 0.2 mi | 0 / 0 |
| Jan 10, 1989 | F1 | 12 mi | 0.2 mi | 0 / 0 |
| Aug 14, 1968 | F1 | 22 mi | 0.1 mi | 0 / 0 |
| Sep 7, 2013 | EF0 | 17 mi | 0.1 mi | 0 / 0 |
| May 30, 2005 | F0 | 15 mi | 0.2 mi | 0 / 0 |
| May 8, 1998 | F0 | 12 mi | 0.1 mi | 0 / 0 |
| Apr 5, 1997 | F0 | 11 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 17, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Herriman
The Storm Prediction Center has 26 hail reports within 10 miles of Herriman since 1991, made on 24 separate days. Of these, 18 were 1 inch across or larger, and none reached 2 inches. The largest, 1.75 inches (golf ball size), fell on August 4, 1991. The most recent report is from August 13, 2024. August has the most reports, 14.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Herriman
The nearest NOAA station with 1991–2020 climate normals is Utah Lake Lehi, UT, 12 miles southeast of Herriman at 4,505 feet. July is the warmest, with an average high of 92°F and low of 59°F; January is the coolest, at 38°F and 19°F. April and May are the wettest at 1.6 inches of precipitation on average and June the driest at 0.6 inches; the year adds up to 13.2 inches over 39 days with at least a tenth of an inch. Highs reach 90°F on about 50 days a year, almost all from June to September. Lows fall below freezing on about 149 nights a year. Snowfall averages 26.3 inches a year, most of it in December. That 13.2 inches is more than at 17 of the 58 Utah stations used on this site (29%). Riverton, 6 miles east, has its own station (Alpine, UT): 21.0 inches a year, 7.8 more than here, and a July average high of 90°F against 92°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 38 | 19 | 1.2 | 4 | 7.4 |
| Feb | 44 | 24 | 1.1 | 4 | 3.6 |
| Mar | 53 | 32 | 1.1 | 4 | 1.8 |
| Apr | 62 | 36 | 1.6 | 5 | 1.3 |
| May | 71 | 44 | 1.6 | 5 | 0.0 |
| Jun | 83 | 51 | 0.6 | 1 | 0.0 |
| Jul | 92 | 59 | 0.7 | 2 | 0.0 |
| Aug | 89 | 58 | 1.0 | 3 | 0.0 |
| Sep | 79 | 47 | 1.1 | 3 | 0.0 |
| Oct | 65 | 36 | 1.2 | 3 | 0.3 |
| Nov | 49 | 27 | 0.9 | 3 | 3.7 |
| Dec | 40 | 20 | 1.1 | 3 | 8.2 |
| Year | 64 | 38 | 13.2 | 39 | 26.3 |
Averages for 1991–2020 at Utah Lake Lehi, UT (4,505 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 Herriman
Since 1996, the National Weather Service has logged 53 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Herriman: 45 thunderstorm wind reports, 6 flash floods, 1 flood and 1 heavy rain event. None is recorded as killing or injuring anyone; the NWS estimated $16.6 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on August 5, 2013. August has had the most flash floods, 4 of 6. Of the 90 Utah cities on this site with a flash flood on record, 54 have had fewer than Herriman.
August 3, 2023: flash flood 9 miles from the centre of Herriman — $16.0 million damage.
August 5, 2013: thunderstorm wind 6 miles from the centre of Herriman — $300,000 damage.
August 3, 2007: flash flood 6 miles from the centre of Herriman — $125,000 damage.
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
Salt Lake County, which includes Herriman, has been named in 12 federal disaster or emergency declarations since 1983, 7 of them major disasters (by incident: 3 fires, 3 floods, 2 biological emergencies, 1 coastal storm). The latest major disaster declaration was Straight-Line Winds, on January 12, 2021. FEMA's National Risk Index gives Salt Lake County a Relatively High rating for natural hazard risk overall; by hazard: Relatively High for lightning; Relatively Moderate for tornadoes, inland flooding, strong wind and heat waves; Relatively Low for hail. It models the county's expected loss from all 18 hazards it covers at $621.7 million a year, the highest of 29 Utah counties; of the hazards above, the largest share, $79.3 million (13%), 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.