Green Valley, AZ Tornado History — 14 Tornadoes Since 1950
How many tornadoes has Green Valley, AZ had?
Green Valley has had 14 tornadoes on record within 25 miles since 1950.
When was the most recent tornado near Green Valley?
The most recent tornado within 25 miles of Green Valley was an Unrated on September 16, 2025.
When is tornado season in Green Valley?
July is historically the peak month for tornadoes near Green Valley, with 5 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 Green Valley
The last 20 years of confirmed tornadoes within 25 miles — 4 total, averaging 0.2 per year over this window.
Preliminary tornado reports near Green 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Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete.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 Green 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 Green Valley
3 fatalities have been recorded within 25 miles of Green Valley since 1950, across 2 events. 50 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 Green Valley
About Tornadoes in Green 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.
Green Valley, Arizona, has experienced 14 documented tornadoes within a 25-mile radius since 1950, according to the NOAA Storm Prediction Center. While tornadoes are relatively uncommon in southern Arizona compared to the Great Plains, the area's monsoon season creates atmospheric conditions that can occasionally produce these rotating storms. The majority of recorded events have been weak, with six tornadoes rated EF0 and six rated EF1 on the Enhanced Fujita scale, which measures tornado intensity based on damage. Only one tornado reached EF2 strength, and one event remains unrated.
Tornado activity in the Green Valley area shows a distinct seasonal pattern, with July accounting for five of the 14 recorded events. This concentration during mid-summer aligns with Arizona's monsoon season, when moisture from the Gulf of California combines with daytime heating to generate severe thunderstorms. By decade, the 1960s saw the most activity with four tornadoes, while the 1950s, 1970s, 1980s, 2000s, and 2010s each recorded one or two events. The 2020s have already produced three tornadoes through 2025.
The deadliest tornado on record struck on August 27, 1964, when an F2-rated tornado caused two fatalities, $27,500 in property damage, and carved a 0.1-mile path with a maximum width of 10 yards. The costliest event occurred on June 23, 1974, when an F1 tornado resulted in one fatality and $275,000 in damage along a one-mile path. More recently, an EF1 tornado on July 3, 2024, became both the widest and longest-tracked tornado in the area's recorded history, traveling 3.3 miles with a maximum width of 150 yards and causing $50,000 in damage without injuries.
The most recent tornado occurred on September 16, 2025, though it remains unrated with minimal impact—no fatalities, no property damage, and a path width of just one yard. While tornadoes can occur in any location given the right atmospheric conditions, the relatively modest historical record for Green Valley reflects the region's typically dry climate and the infrequency with which conditions align to produce significant rotating storms.