NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Stevenson Ranch, CA
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Stevenson Ranch, California since records began in 1851. Since 1950, 6 tornadoes have touched down within 25 miles, 0 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 6
- EF3 or stronger
- 0
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
no recorded deaths
What the records show for Stevenson Ranch
The strongest of the 6 tornadoes within 25 miles was an F2 on November 9, 1982; its path came within 16 miles. Of the 6, one had a path within 5 miles of the city centre, and none has come since 2000. The most recent tornado was on April 1, 1999. Of the 705 California cities on this site, 75% have more tornadoes within 25 miles than Stevenson Ranch. Hail has been reported within 10 miles 5 times since 1993, with stones up to 1 inch (quarter size). Stevenson Ranch has more hail reports within 10 miles than 62% of the 705 California cities.
Compare Stevenson Ranch's storm record with another city →
Tornadoes within 25 miles of Stevenson Ranch
By decade
- 1990s3
- 1980s1
- 1970s1
- 1950s1
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Nov 9, 1982 | F2 | 16 mi | 1 mi | 0 / 0 |
| Jan 31, 1979 | F1 | 19 mi | 0.1 mi | 0 / 0 |
| Apr 1, 1999 | F0 | 9 mi | 0.1 mi | 0 / 0 |
| Feb 7, 1994 | F0 | 16 mi | 0.1 mi | 0 / 0 |
| Dec 7, 1992 | F0 | 18 mi | 0.1 mi | 0 / 0 |
| Dec 20, 1952 | F0 | 3 mi | 0.1 mi | 0 / 0 |
The strongest 6 of 6, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Stevenson Ranch
The Storm Prediction Center has 5 hail reports within 10 miles of Stevenson Ranch since 1993. Of these, 3 were 1 inch across or larger, and none reached 2 inches. The largest size, 1 inch (quarter size), was reported on 3 days, most recently March 7, 2024. The most recent report is from March 7, 2024.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Stevenson Ranch
The nearest NOAA station with 1991–2020 climate normals is Newhall 5NW, CA, in Stevenson Ranch at 1,765 feet. August is the warmest, with an average high of 96°F and low of 64°F; December is the coolest, at 62°F and 44°F. Highs reach 90°F on about 87 days a year, almost all from April to October. Lows fall below freezing on about 1 nights a year. That 16.6 inches is more than at 119 of the 226 California stations used on this site (53%). Porter Ranch, 8 miles south, has its own station (Northridge Cal State, CA): 14.7 inches a year, 1.9 less than here, and an August average high of 92°F against 96°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" |
|---|---|---|---|---|
| Jan | 63 | 47 | 4.2 | 3 |
| Feb | 65 | 45 | 4.4 | 5 |
| Mar | 70 | 47 | 2.9 | 3 |
| Apr | 74 | 49 | 0.8 | 2 |
| May | 81 | 54 | 0.3 | 1 |
| Jun | 87 | 57 | 0.0 | 0 |
| Jul | 94 | 63 | 0.0 | 0 |
| Aug | 96 | 64 | 0.0 | 0 |
| Sep | 91 | 62 | 0.1 | 0 |
| Oct | 81 | 56 | 0.5 | 1 |
| Nov | 71 | 49 | 0.8 | 2 |
| Dec | 62 | 44 | 2.6 | 3 |
| Year | 78 | 53 | 16.6 | 19 |
Averages for 1991–2020 at Newhall 5NW, CA (1,765 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Stevenson Ranch
Since 1996, the National Weather Service has logged 26 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Stevenson Ranch: 17 flash floods, 6 thunderstorm wind reports, 2 floods and 1 heavy rain event. The strongest thunderstorm gust on record here was 70 mph, on February 18, 2026. February has had the most flash floods, 8 of 17. Of the 550 California cities on this site with a flash flood on record, 418 have had fewer than Stevenson Ranch.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Los Angeles County, which includes Stevenson Ranch, has been named in 88 federal disaster or emergency declarations since 1969, 35 of them major disasters (by incident: 61 fires, 10 floods, 8 severe storms, 3 earthquakes). The latest major disaster declaration was Wildfires and Straight-Line Winds, on January 8, 2025. FEMA's National Risk Index gives Los Angeles County a Very High rating for natural hazard risk overall; by hazard: Very High for inland flooding and lightning; Relatively High for tornadoes, coastal flooding and heat waves; Relatively Moderate for hail and strong wind. It models the county's expected loss from all 18 hazards it covers at $7.60 billion a year, the highest of 58 California counties; of the hazards above, the largest share, $2.81 billion (37%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Stevenson Ranch
- Valencia, CA3 mi
- Castaic, CA7 mi
- Porter Ranch, CA8 mi
- Chatsworth, CA9 mi
- Granada Hills, CA9 mi
- Canyon Country, CA9 mi
- Santa Clarita, CA10 mi
- Sylmar, CA10 mi
- San Fernando, CA11 mi
- Mission Hills, CA11 mi
- Simi Valley, CA12 mi
- North Hills, CA12 mi
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