Ontario, California tornadoes
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NOAA has no confirmed tornado within 10 miles of Ontario since 1950.
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Ontario and its county
Ontario is in San Bernardino County, where NOAA has recorded 33 tornadoes since 1950. A county's record counts every tornado inside its borders, while this page counts every path within 10 miles of the city, so the two overlap without matching.
Nearby cities
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Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025. City point and population: US Census Bureau, 2024. Each path is a straight line between NOAA's start and end points.