NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Hermosa, SD
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 Hermosa, South Dakota since records began in 1851. Since 1950, 33 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 33
- 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 Hermosa
The highest rating among the 33 tornadoes within 25 miles is F2 or EF2, reached 5 times; the most recent, on June 13, 2016, came within 8 miles. Of the 33, none had a path within 5 miles of the city centre, and 4 have come since 2000. June has had the most tornadoes, 13. The most recent tornado was on May 23, 2021. Of the 61 South Dakota cities on this site, 87% have more tornadoes within 25 miles than Hermosa. Hail has been reported within 10 miles 151 times since 1956, with stones up to 4.25 inches. Hermosa has more hail reports within 10 miles than 68% of the 61 South Dakota cities.
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Tornadoes within 25 miles of Hermosa
By decade
- 2020s2
- 2010s2
- 1990s11
- 1980s4
- 1970s4
- 1960s9
- 1950s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 13, 2016 | EF2 | 8 mi | 7.42 mi | 0 / 0 |
| Jun 18, 1967 | F2 | 20 mi | 1 mi | 0 / 3 |
| Jul 23, 1966 | F2 | 18 mi | 3.8 mi | 0 / 5 |
| Jun 22, 1966 | F2 | 9 mi | 0.1 mi | 0 / 0 |
| Jun 11, 1965 | F2 | 23 mi | 0.1 mi | 0 / 0 |
| May 23, 2021 | EF1 | 20 mi | 5.86 mi | 0 / 0 |
| May 23, 2021 | EF1 | 22 mi | 6.6 mi | 0 / 0 |
| May 11, 1991 | F1 | 24 mi | 0.5 mi | 0 / 0 |
| Jun 18, 1983 | F1 | 24 mi | 0.1 mi | 0 / 0 |
| Jun 18, 1983 | F1 | 24 mi | 0.1 mi | 0 / 0 |
| Jul 14, 1979 | F1 | 24 mi | 0.1 mi | 0 / 0 |
| Jun 25, 1975 | F1 | 23 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 33, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Hermosa
The Storm Prediction Center has 151 hail reports within 10 miles of Hermosa since 1956, made on 104 separate days. Of these, 131 were 1 inch across or larger, and 23 reached 2 inches. The largest, 4.25 inches, fell on June 1, 2008. The most recent report is from July 6, 2025. July has the most reports, 65.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Hermosa
The nearest NOAA station with 1991–2020 climate normals is Rapid City Regional Airport, SD, 17 miles north of Hermosa at 3,160 feet. July is the warmest, with an average high of 86°F and low of 59°F; January is the coolest, at 36°F and 13°F. May is the wettest at 3.5 inches of precipitation on average and January the driest at 0.3 inches; the year adds up to 17.6 inches over 41 days with at least a tenth of an inch. Highs reach 90°F on about 32 days a year, almost all from June to September. Lows fall below freezing on about 174 nights a year. Snowfall averages 48.5 inches a year, most of it in April. That 17.6 inches is more than at 1 of the 43 South Dakota stations used on this site (2%). Rapid City, 21 miles northwest, has its own station (Rapid City WFO, SD): 20.0 inches a year, 2.4 more than here, and a July average high of 84°F against 86°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 36 | 13 | 0.3 | 1 | 5.3 |
| Feb | 38 | 14 | 0.5 | 2 | 7.7 |
| Mar | 48 | 23 | 0.9 | 2 | 8.4 |
| Apr | 57 | 31 | 2.1 | 5 | 10.1 |
| May | 67 | 42 | 3.5 | 7 | 1.5 |
| Jun | 78 | 52 | 2.9 | 7 | 0.0 |
| Jul | 86 | 59 | 2.3 | 5 | 0.0 |
| Aug | 85 | 56 | 1.6 | 4 | 0.0 |
| Sep | 76 | 46 | 1.2 | 3 | 0.1 |
| Oct | 60 | 34 | 1.4 | 3 | 3.0 |
| Nov | 47 | 22 | 0.5 | 1 | 5.7 |
| Dec | 37 | 14 | 0.4 | 1 | 6.7 |
| Year | 60 | 34 | 17.6 | 41 | 48.5 |
Averages for 1991–2020 at Rapid City Regional Airport, SD (3,160 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 Hermosa
Since 1996, the National Weather Service has logged 72 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Hermosa: 65 thunderstorm wind reports, 5 floods, 1 flash flood and 1 heavy rain event. None is recorded as killing or injuring anyone; the NWS estimated $72,000 in property and crop damage. The strongest thunderstorm gust on record here was 86 mph, on June 9, 2001.
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 Hermosa's ZIP code 57744 have filed 25 claims with the National Flood Insurance Program since 2006, and were paid $533,000 for buildings and contents, in the dollars of each year. The year with the most claims was 2007, with 23. Of the 28 South Dakota cities on this site with 10 or more claims, 11 have fewer than Hermosa.
Custer County, which includes Hermosa, has been named in 17 federal disaster or emergency declarations since 1972, 9 of them major disasters (by incident: 6 fires, 4 floods, 3 severe storms, 2 biological emergencies). The latest major disaster declaration was Straight-Line Winds, on April 7, 2026. FEMA's National Risk Index gives Custer County a Very Low rating for natural hazard risk overall; by hazard: Relatively Low for hail and lightning; Very Low for tornadoes, inland flooding, strong wind and heat waves. It models the county's expected loss from all 18 hazards it covers at $8.8 million a year, the 26th highest of 66 South Dakota counties; of the hazards above, the largest share, $3.2 million (37%), 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 Hermosa
- Rapid City, SD21 mi
- Box Elder, SD23 mi
- Ellsworth Afb, SD24 mi
- Custer, SD28 mi
- Black Hawk, SD29 mi
- Piedmont, SD33 mi
- Hot Springs, SD35 mi
- Oglala, SD40 mi
- Sturgis, SD47 mi
- Lead, SD52 mi
- Kyle, SD53 mi
- Whitewood, SD54 mi
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