NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Delta, 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 Delta, Utah since records began in 1851. Since 1950, 2 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 2
- 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 Delta
The highest rating among the 2 tornadoes within 25 miles is F0, reached 2 times; the most recent, on May 28, 1996, came within 6 miles. Of the 99 Utah cities on this site, 95% have more tornadoes within 25 miles than Delta. Hail has been reported within 10 miles once, in 2021, with stones of 0.75 inches (penny size). Of the 99 Utah cities, 88% have more hail reports within 10 miles than Delta.
Compare Delta's storm record with another city →
Tornadoes within 25 miles of Delta
By decade
- 1990s1
- 1980s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 28, 1996 | F0 | 6 mi | 0.2 mi | 0 / 0 |
| Jun 7, 1989 | F0 | 12 mi | 0.2 mi | 0 / 0 |
The strongest 2 of 2, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Delta
The Storm Prediction Center has one hail report within 10 miles of Delta, from August 19, 2021: 0.75 inches (penny size).
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Delta
The nearest NOAA station with 1991–2020 climate normals is Delta, UT, 2 miles west of Delta at 4,620 feet. July is the warmest, with an average high of 95°F and low of 57°F; December is the coolest, at 39°F and 15°F. Highs reach 90°F on about 75 days a year, almost all from May to September. Lows fall below freezing on about 176 nights a year. Snowfall averages 25.3 inches a year, most of it in January. That 7.9 inches is more than at 2 of the 58 Utah stations used on this site (3%). Fillmore, 30 miles southeast, has its own station (Fillmore, UT): 15.2 inches a year, 7.3 more than here, and a July average high of 88°F against 95°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 39 | 16 | 0.6 | 2 | 5.5 |
| Feb | 47 | 21 | 0.6 | 3 | 5.3 |
| Mar | 58 | 27 | 0.8 | 3 | 3.9 |
| Apr | 65 | 33 | 0.9 | 3 | 2.2 |
| May | 76 | 41 | 0.9 | 3 | 0.0 |
| Jun | 87 | 49 | 0.5 | 2 | 0.0 |
| Jul | 95 | 57 | 0.4 | 1 | 0.0 |
| Aug | 93 | 56 | 0.5 | 2 | 0.0 |
| Sep | 82 | 46 | 0.7 | 2 | 0.0 |
| Oct | 68 | 33 | 0.9 | 3 | 0.8 |
| Nov | 51 | 23 | 0.5 | 2 | 3.2 |
| Dec | 39 | 15 | 0.6 | 2 | 4.4 |
| Year | 67 | 35 | 7.9 | 27 | 25.3 |
Averages for 1991–2020 at Delta, UT (4,620 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 Delta
Since 1996, the National Weather Service has logged 13 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Delta: 10 thunderstorm wind reports, 2 flash floods and 1 flood. None is recorded as killing or injuring anyone; the NWS estimated $1.0 million in property and crop damage. The strongest thunderstorm gust on record here was 74 mph, on June 25, 2005.
August 18, 2021: flood 3 miles from the centre of Delta — $1.0 million damage.
NWS: “Widespread basement flooding occurred in and around Delta. 83 inches.”
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
Flood insurance policyholders in Delta's ZIP code 84624 have filed 40 claims with the National Flood Insurance Program since 1983, and were paid $624,000 for buildings and contents, in the dollars of each year. The year with the most claims was 1983, with 39. Of the 23 Utah cities on this site with 10 or more claims, 17 have fewer than Delta.
Millard County, which includes Delta, has been named in 11 federal disaster or emergency declarations since 1977, 4 of them major disasters (by incident: 4 fires, 3 floods, 2 biological emergencies, 1 coastal storm). The latest major disaster declaration was Covid-19 Pandemic, on April 4, 2020. FEMA's National Risk Index gives Millard County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for lightning; Very Low for tornadoes, hail, inland flooding, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $7.1 million a year, the 17th highest of 29 Utah counties; of the hazards above, the largest share, $1.8 million (25%), 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.
Cities near Delta
- Fillmore, UT30 mi
- Gunnison, UT39 mi
- Nephi, UT42 mi
- Richfield, UT47 mi
- Mona, UT51 mi
- Ephraim, UT52 mi
- Manti, UT52 mi
- Salina, UT53 mi
- Santaquin, UT60 mi
- Mt Pleasant, UT61 mi
- Monroe, UT62 mi
- Payson, UT64 mi
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