Riverton, UT Tornado History — 25 Tornadoes Since 1950
How many tornadoes has Riverton, UT had?
Riverton has had 25 tornadoes on record within 25 miles since 1950.
When was the most recent tornado near Riverton?
The most recent tornado within 25 miles of Riverton was an EF1 on September 2, 2021.
When is tornado season in Riverton?
September is historically the peak month for tornadoes near Riverton, with 6 on record. Spring through early summer (April–June) generally sees the highest activity across most of the central and southern United States.
At a Glance
Recent Tornado Activity Near Riverton
The last 20 years of confirmed tornadoes within 25 miles — 2 total, averaging 0.1 per year over this window.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Casualties on Record Near Riverton
1 fatality has been recorded within 25 miles of Riverton since 1950, across 1 event. 82 injuries have been reported across all events. 1999 was the deadliest year on record.
The deadliest single event was a F2 on August 11, 1999, which caused 1 fatality along a 4.3-mile track.
Notable Tornadoes Near Riverton
About Tornadoes in Riverton
This overview was written April 23, 2026. The tornado counts and notable-event figures elsewhere on this page reflect the latest data and may differ from this summary.
Since 1950, the National Oceanic and Atmospheric Administration Storm Prediction Center has documented 25 tornadoes within 25 miles of Riverton, UT. The majority of these events have been relatively weak, with 12 rated EF0 and 10 rated EF1 on the Enhanced Fujita scale, which measures tornado intensity from EF0 (weakest) to EF5 (strongest). Three tornadoes reached EF2 intensity, capable of causing considerable damage to structures.
Tornado activity in the Riverton area has varied significantly by decade. The 1990s saw the highest concentration with 10 recorded events, while the 1960s recorded 4 tornadoes and the 1980s logged 5. Activity declined notably in recent decades, with only 2 tornadoes in the 2000s, 1 in the 2010s, and 1 in the 2020s. September has been the most active month historically, accounting for 6 of the 25 total tornadoes on record.
The deadliest tornado in the area's recorded history occurred on August 11, 1999, when an F2-rated tornado resulted in 1 fatality. This storm carved a 4.3-mile path with a maximum width of 150 yards and caused $170 in property damage. The costliest event took place on May 4, 1993, when an F1 tornado caused $275,000 in property damage despite traveling only 0.1 miles with a maximum width of just 13 yards.
The longest-tracked tornado near Riverton traveled 10.0 miles on July 26, 1991, maintaining F1 intensity with a maximum width of 100 yards and causing $2,750 in damage. The most recent tornado occurred on September 3, 2021, an EF1-rated event that achieved the widest recorded path at 350 yards while traveling 2.0 miles. This storm caused no fatalities and no reported property damage, illustrating the variability in tornado impacts even at similar intensity ratings.