Oro Valley, AZ Tornado History — 20 Tornadoes Since 1950
How many tornadoes has Oro Valley, AZ had?
Oro Valley has had 20 tornadoes on record within 25 miles since 1950.
When was the most recent tornado near Oro Valley?
The most recent tornado within 25 miles of Oro Valley was an EF1 on July 2, 2024.
When is tornado season in Oro Valley?
July is historically the peak month for tornadoes near Oro Valley, with 8 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 Oro Valley
The last 20 years of confirmed tornadoes within 25 miles — 6 total, averaging 0.3 per year over this window.
Preliminary tornado reports near Oro Valley since December 29, 2025
These is a preliminary report, not confirmed tornadoes. It has not yet been through an NWS damage survey, and is not counted in the confirmed totals above.
Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete. Ratings are omitted until a survey assigns one.
Confirmed records above are complete through December 29, 2025. NOAA publishes the confirmed archive annually, so tornadoes after that date appear here first and move into the totals above once finalized.
Within 25 miles of Oro Valley. Source: NOAA Storm Prediction Center preliminary storm reports, updated daily.
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 Oro Valley
3 fatalities have been recorded within 25 miles of Oro Valley since 1950, across 2 events. 53 injuries have been reported across all events. 1964 was the deadliest year on record.
The deadliest single event was a F2 on August 27, 1964, which caused 2 fatalities along a 0.1-mile track.
Notable Tornadoes Near Oro Valley
About Tornadoes in Oro Valley
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, twenty tornadoes have been documented within 25 miles of Oro Valley, Arizona, according to records maintained by the NOAA Storm Prediction Center. This relatively modest total reflects the region's position in the Sonoran Desert, where atmospheric conditions favorable for tornado development occur less frequently than in more humid climates. The majority of these events have been weak, with ten rated EF0 and seven rated EF1 on the Enhanced Fujita scale, which classifies tornadoes based on estimated wind speeds and observed damage. Two tornadoes reached EF2 intensity, and one remains unrated.
Tornado activity near Oro Valley shows a distinct seasonal pattern, with July accounting for eight of the twenty recorded events. This summer peak aligns with the North American monsoon season, when moisture surges from the Gulf of California interact with daytime heating to produce strong thunderstorms capable of generating brief tornadoes. By decade, the 1990s saw the most activity with six tornadoes, while the 1980s recorded only one. The 2020s have already produced four events through the date of these records.
The deadliest tornado in the area's history occurred on August 27, 1964, when an F2 tornado caused two fatalities along a brief 0.1-mile path with a maximum width of just ten yards, resulting in $27,500 in property damage. The costliest event took place on July 7, 1992, when an F1 tornado carved a 2.8-mile path and caused $2.75 million in damage despite its narrow ten-yard width, though no fatalities were reported. The longest-tracked tornado traveled 4.7 miles on October 23, 1974, maintaining F1 intensity with a 33-yard width but causing no recorded damage.
The most recent tornado struck on July 3, 2024, an EF1 event that also holds the distinction of being the widest on record at 150 yards. This tornado traveled 3.3 miles and caused $50,000 in damage without injuries. While tornadoes remain relatively uncommon in the Oro Valley area compared to regions with more frequent severe weather, the historical record demonstrates that they do occur, primarily during the summer monsoon months when atmospheric instability is greatest.