Diamond Bar, CA Tornado History — 39 Tornadoes Since 1950
How many tornadoes has Diamond Bar, CA had?
Diamond Bar has had 39 tornadoes on record within 25 miles since 1950.
When was the most recent tornado near Diamond Bar?
The most recent tornado within 25 miles of Diamond Bar was an EF0 on March 13, 2025.
When is tornado season in Diamond Bar?
March is historically the peak month for tornadoes near Diamond Bar, with 11 on record. April through June account for 4 of the 39 tornadoes on record near Diamond Bar.
At a Glance
Recent Tornado Activity Near Diamond Bar
The last 20 years of confirmed tornadoes within 25 miles — 5 total, averaging 0.3 per year over this window.
What storm spotters reported near Diamond Bar
2 local storm reports have been filed within 25 miles of Diamond Bar and since confirmed into the NOAA archive, the earliest on May 9, 2025 and the most recent on December 25, 2025. They are already counted in the Diamond Bar totals above; quoted below is the narrative each reporting office filed at the time.
The National Weather Service conducted a storm survey in the neighborhood of Boyle Heights in Los Angeles County... CA for damage associated with a low-topped mini supe (LOX)
[Landspout] Time of occurrence is approximate. Dust devil did damage to a carport. (SGX)
Source: National Weather Service and trained-spotter local storm reports, relayed by the NOAA Storm Prediction Center.
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
Have any tornadoes near Diamond Bar been fatal?
No fatalities are on record within 25 miles of Diamond Bar from any of the 39 tornadoes since 1950, though 18 injuries have been reported, according to NOAA Storm Prediction Center records.
Notable Tornadoes Near Diamond Bar
What the record shows near Diamond Bar
The 1990s were the busiest decade near Diamond Bar, with 14 of the 39 confirmed tornadoes within 25 miles; the 2020s have produced 4 so far. The Diamond Bar record runs from the 1950s to today.
Of the tornadoes rated near Diamond Bar, 37 reached EF0 or EF1 and 2 reached EF2 or stronger. The most intense on record near Diamond Bar is rated EF2, of which 2 are logged.
Across the last 20 years Diamond Bar has averaged 0.3 confirmed tornadoes a year within 25 miles, 5 in total. 2023 was the busiest of them with 3, and 17 of those years passed with none at all.