California Storm Data: Hail & Wind History Since 2010
Deduplicated storm activity for California, fused from NWS warnings, storm reports, official records, and FEMA declarations.
Latest California hail and wind storms
- Last reported hail in California (0.75 in.+, screening): August 13, 2026 — 1.00 in. reported at Lee Vining (Mono County), NWS Local Storm Report.
- 2026 so far in California: 4 hail days and 97 wind days statewide (days with a storm report or station gust at the screening thresholds; warnings alone never count).
| Date | Largest reported hail | Strongest gust | City pages hit |
|---|---|---|---|
| October 16, 2026 | — | 81 mph measured | Los Angeles, Anaheim, Riverside, Santa Clarita, San Bernardino +25 more |
| October 15, 2026 | — | 52 mph measured | Anaheim, Riverside, San Bernardino, Fontana, Ontario +9 more |
| October 11, 2026 | — | 64 mph measured | — |
| October 10, 2026 | — | 66 mph measured | Riverside, San Bernardino, Fontana, Ontario, Rancho Cucamonga +5 more |
| October 8, 2026 | — | 75 mph measured | — |
| September 28, 2026 | — | 54 mph measured | — |
| September 27, 2026 | — | 58 mph measured | — |
| September 16, 2026 | — | 52 mph measured | — |
| September 13, 2026 | — | 59 mph measured | — |
| September 9, 2026 | — | 75 mph measured | — |
Cities hit this week
City pages with a storm report or station gust at the screening thresholds (hail 0.75 in.+, wind 45 mph+) within 25 miles in the last 7 days, freshest first.
- Alhambra hail & wind — Oct 16, 2026 · 81 mph gust measured
- Burbank hail & wind — Oct 16, 2026 · 81 mph gust measured
- Glendale hail & wind — Oct 16, 2026 · 81 mph gust measured
- Lancaster hail & wind — Oct 16, 2026 · 81 mph gust measured
- Palmdale hail & wind — Oct 16, 2026 · 81 mph gust measured
- Pasadena hail & wind — Oct 16, 2026 · 81 mph gust measured
- Santa Clarita hail & wind — Oct 16, 2026 · 81 mph gust measured
- Los Angeles hail & wind — Oct 16, 2026 · 73 mph gust measured
- Santa Monica hail & wind — Oct 16, 2026 · 73 mph gust measured
- El Monte hail & wind — Oct 16, 2026 · 68 mph gust measured
- Pomona hail & wind — Oct 16, 2026 · 66 mph gust measured
- West Covina hail & wind — Oct 16, 2026 · 66 mph gust measured
California storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 3,213 deduplicated storm events (wind, hail, tornado, and flood; NWS warning products included) in California in the 12 months ending October 21, 2026.
- Storm activity touched 58 of 58 California counties over that period.
- The most impacted county in California was Los Angeles, with 384 events.
- The busiest day by event count in California was December 24, 2025, with 409 events.
California storm activity at a glance (last 12 months)
StormAuditor's consolidated public record currently shows 3,213 storm events impacting 58 of California's 58 counties in the trailing 12 months: 1,757 wind events, 185 hail events, 24 tornado events, 1,247 flood events. Every count includes NWS warnings as well as observed reports, so tornado events mean tornado warnings and reports, not confirmed tornadoes.
Events are fused from National Weather Service warnings and Special Weather Statements, observed Local Storm Reports, official NCEI storm records, and FEMA disaster declarations, then consolidated into a single event table under the published methodology.
Wind covers thunderstorm and non-thunderstorm wind alike, so these counts measure something different from the NCEI entry counts in the history section below; the two are not comparable year to year. State totals also count NWS Special Weather Statements (radar-indicated hail or gusts below warning level); city pages leave those out.
Busiest days in California by event count
Ranked by the number of 12-month events, NWS warnings included, so a day with many warnings can outrank a day with larger hail.
- December 24, 2025 — 409 events incl. warnings (flood, hail, tornado, wind)
- December 25, 2025 — 174 events incl. warnings (flood, hail, tornado, wind)
- January 3, 2026 — 125 events incl. warnings (flood, hail, tornado, wind)
- November 15, 2025 — 120 events incl. warnings (flood, wind)
- December 21, 2025 — 112 events incl. warnings (flood, wind)
Most impacted counties
Events of every type for each county — wind, hail, tornado and flood, NWS warnings and Special Weather Statements included. City pages count wind and hail events only, so a county number on a city page is never higher than the number here.
- Los Angeles — 384 events
- Mono — 285 events
- San Bernardino — 200 events
- Kern — 180 events
- Humboldt — 123 events
- Ventura — 121 events
- Alameda — 101 events
- Sonoma — 96 events
Additional activity recorded under other NWS area names (forecast zones, tribal lands, and former census areas): Interstate 5 Corridor (12) · Santa Barbara County Southwestern Coast (12) · Santa Ynez Mountains Western Range (12) · Antelope Valley (8).
How these numbers are counted
The storm numbers on this page are counted in four different ways, plus the free address check. Each answers a different question with its own size cutoffs, area and time span, so compare numbers within one group, not across groups.
- Storm days (latest hail and wind): A day in the last 12 months when at least one report anywhere in California showed hail 0.75 in. or larger or wind of 45 mph or more (StormAuditor screening thresholds). Reports are NWS storm reports from spotters, the public and officials, plus weather-station gusts, which count from 50 mph. A warning on its own never makes a storm day. The "City pages hit" column and each city's last reported hail apply the same rule within 25 miles of the city. The statewide columns count reports inside California only. City pages count reports within 25 miles of each city, which can reach into a neighboring state; those values name the other state, so a border city's value for a day can be higher than the California value.
- Storm-date pages (NWS severe): A storm-date page is published only when at least one report or station gust within 25 miles of a city met the National Weather Service severe criteria (hail 1.00 in. or larger, or wind 58 mph or more), at least two separate observations were logged, and the day ranks among the most significant. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. Not every storm day gets a page; when one does, the page and the storm-day table show the same largest hail and strongest gust.
- Events (12-month counts): Events count the California storm log: NWS warnings and Special Weather Statements (a lower-level NWS alert), storm reports (wind 50 mph+, hail 0.75 in.+), station gusts, NCEI entries and FEMA disaster declarations, for each county affected, floods included. One event is one place on one day, counted separately for each type (wind, hail, tornado, flood). A weather station or storm-report point counts once a day, at that day's highest reading, however many readings it filed; a place with hail and wind on the same day is two events. NWS warnings and Special Weather Statements count once per county per day, and NCEI entries and FEMA declarations once per place per day. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. The same report arriving through another feed (SPC or NCEI) is one record. The most impacted counties list uses this count. City pages count only wind and hail within 25 miles and leave out floods and Special Weather Statements, so city counts do not add up to the state total, and a city page's county count is a wind-and-hail count that is never higher than the same county's number here.
- NOAA history (since 2010): The official NOAA storm record (NCEI Storm Events) in California from January 1, 2010 to the day before the 12-month window starts: hail 0.50 in.+, thunderstorm wind 40 mph+ and tornadoes. It is a separate, older record with its own "storm days" (days with any entry), so its counts are not compared with the 12-month numbers.
- Free Report Snapshot: A free YES/NO estimate for one address, from radar and wind analysis at the property rather than area reports, at the same screening thresholds: hail 0.75 in. or wind 45 mph.
Full method: Methodology and Data Sources.
California hail and wind history in NOAA NCEI records, 2010–Oct. 2025
This section covers January 1, 2010 through October 20, 2025. Storms from October 21, 2025 on are in the 12-month summary above, so no date is counted in both.
The National Centers for Environmental Information logged 431 storm days in California in this period — 1,233 NCEI Storm Events entries in all. Thunderstorm wind outnumbers hail about 2.8 to 1 here: 811 wind reports against 287 hail reports.
Hail peaks in July (21% of all hail reports), while thunderstorm wind reports cluster in August. December through February accounts for 55 storm days.
The most storm days came in 2015 and 2019, with 35 each; the fewest in a full year was 15, in 2020. Across 2022–2024, California averaged 29 storm days a year, above the 15-year average of 27.
The largest hail in these records for California was 3.00 in. (teacup size), reported in 2016 and 2019 — most recently on May 24, 2019 in Shasta County. Hail of 2 inches or more appears in 3 different years of this record, the latest being 2019. The strongest measured thunderstorm gust was 97 mph on December 14, 2024 in San Mateo County. NCEI also lists 135 tornado entries in California — one entry per county a tornado crossed.
- Average: 27 storm days a year (2010–2024)
- March and July: 37% of all hail reports
- Most hail reports in one year: 37 in 2015
- Hail of 1 in. or larger reported in every full year, 2010–2024
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 22 | 29 | 9 | 24 | 2.00 in. | 64 mph |
| 2011 | 8 | 32 | 9 | 26 | 1.25 in. | 72 mph |
| 2012 | 12 | 26 | 12 | 27 | 1.75 in. | 87 mph |
| 2013 | 20 | 30 | 5 | 33 | 1.75 in. | 70 mph |
| 2014 | 18 | 33 | 9 | 27 | 1.75 in. | 71 mph |
| 2015 | 37 | 31 | 10 | 35 | 1.75 in. | 74 mph |
| 2016 | 19 | 44 | 5 | 19 | 3.00 in. | 86 mph |
| 2017 | 26 | 64 | 3 | 30 | 1.75 in. | 96 mph |
| 2018 | 16 | 14 | 6 | 24 | 1.00 in. | 71 mph |
| 2019 | 27 | 22 | 15 | 35 | 3.00 in. | 78 mph |
| 2020 | 7 | 20 | 8 | 15 | 1.75 in. | 81 mph |
| 2021 | 12 | 80 | 8 | 25 | 1.00 in. | 78 mph |
| 2022 | 8 | 86 | 8 | 27 | 1.25 in. | 72 mph |
| 2023 | 28 | 150 | 20 | 28 | 1.75 in. | 83 mph |
| 2024 | 17 | 68 | 4 | 31 | 1.00 in. | 97 mph |
| 2025 through Oct. 20 | 10 | 82 | 4 | 25 | 1.00 in. | 77 mph |
Counties with the most NCEI storm reports, 2010–Oct. 2025
| County | All entries | Hail | Thunderstorm wind |
|---|---|---|---|
| San Bernardino County | 155 | 25 | 126 |
| Riverside County | 123 | 13 | 99 |
| San Diego County | 117 | 23 | 93 |
| Imperial County | 105 | 5 | 100 |
| Fresno County | 76 | 5 | 64 |
| Los Angeles County | 67 | 12 | 43 |
| Kern County | 50 | 11 | 34 |
| Inyo County | 30 | 5 | 23 |
| Tehama County | 30 | 16 | 5 |
| El Dorado County | 25 | 14 | 7 |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/ca.json (free, open license, cite StormAuditor).
Source: NOAA NCEI Storm Events Database (thunderstorm wind, hail, and tornado entries; hail 0.50 in. or larger, wind 40 mph or more; wind converted from knots).
California storm history questions, 2010–Oct. 2025
How big did hail get in California, 2010–Oct. 2025?
3.00 in., teacup size, reported in 2016 and 2019; most recently on May 24, 2019 in Shasta County, per NCEI. Other years with hail of 2 inches or more: 2010.
Which year had the most storm days in California, 2010–Oct. 2025?
2015 and 2019 tied, with 35 storm days each. The 15-year average is 27 storm days.
How many hail reports does California see in a typical year?
About 18 hail reports a year (2010–2024 average), with 1-inch or larger hail reported every year. Thunderstorm wind averages 49 reports a year.
What month has the most hail in California?
July has the most hail reports (61, 2010–Oct. 2025), followed by March (46) and August (41).
What is the strongest measured thunderstorm gust in California, 2010–Oct. 2025?
97 mph, measured on December 14, 2024 in San Mateo County. Only gusts NCEI lists as measured count here; gusts measured on a date and county with a tornado entry, and entries of 120 knots or more (known entry errors), are left out.
For roofers, adjusters, and claim attorneys: the professional tools add statewide hail and wind swath maps, the Zone Canvas Tool, and Audit Reports with the evidence and arithmetic — see how roofing contractors and insurance claim attorneys use them.
Sources: NWS alerts (api.weather.gov) · NWS Local Storm Reports via the Iowa Environmental Mesonet · ASOS/AWOS station gusts via the Iowa Environmental Mesonet · NOAA NCEI Storm Events Database · every StormAuditor data source.
Download the California dataset (free)
The full consolidated California event list for the trailing 12 months — dates, counties, hazard types, severities, measured gusts and hail sizes, with coordinates; source records deduplicated, and each NWS warning product listed per affected county — downloads free and stays current with the live record: download CSV · JSON at https://www.stormauditor.com/downloads/storm-data/ca.json. Free to reuse under the data license; the JSON file carries a field dictionary and provenance notes.
Research a specific California address
Statewide counts tell you where activity concentrated; they do not tell you what happened at one property. For an individual address:
- Run the Free Report Snapshot — an instant YES/NO against StormAuditor's screening thresholds (wind ≥ 45 mph, hail ≥ 0.75 in., deliberately below the official NWS severe criteria).
- Use the Address Lookup for warnings, storm reports, and station observations at the address.
- Buy a full Weather Report for $2.99 covering every qualifying storm date at the address.
Browse day-by-day activity on the Storm Calendar (Pro plans and higher) or compare states on the Storm Data hub.
All values are derived from public NOAA and NWS data under StormAuditor's published methodology (see Limitations). Data last refreshed October 21, 2026.
See where recent storms tracked on the statewide California hail map and wind map (the Hail and Wind Explorers, included with Pro+ and Organization plans), or check the county impact heatmap (free with an account).
California cities A–Z: last reported hail
- Alhambra hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Anaheim hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Apple Valley hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Bakersfield hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Bellflower hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Burbank hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Carson hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Chino hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Chino Hills hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Chula Vista hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Compton hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Downey hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- El Monte hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Fontana hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Fresno hail & wind history — last hail April 21, 2026 (0.75 in. reported)
- Glendale hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Hawthorne hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Hesperia hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Inglewood hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Irvine hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Lakewood hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Lancaster hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Long Beach hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Los Angeles hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Norwalk hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Oakland hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Ontario hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Palmdale hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Pasadena hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Pomona hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Rancho Cucamonga hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Rialto hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Riverside hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Sacramento hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- San Bernardino hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- San Diego hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- San Francisco hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- San Jose hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Santa Ana hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Santa Clarita hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Santa Monica hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- South Gate hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Stockton hail & wind history — last hail April 10, 2026 (1.50 in. reported)
- Torrance hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Upland hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Victorville hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- West Covina hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
- Whittier hail & wind history — no 0.75 in.+ hail reported within 25 miles in 12 months
Neighboring states: Arizona storm data · Nevada storm data · Oregon storm data
Guides for reading this data
Storm-day records in California
The newest storm-date pages for California cities: a report or station gust within 25 miles of the city met NWS severe criteria (hail 1.00 in.+ or wind 58 mph+), with at least two separate observations. Each page lists the reports, station gusts and a free way to check one address:
- Alhambra, CA — October 16, 2026 (gusts 81 mph)
- Burbank, CA — October 16, 2026 (gusts 81 mph)
- Glendale, CA — October 16, 2026 (gusts 81 mph)
- Lancaster, CA — October 16, 2026 (gusts 81 mph)
- Palmdale, CA — October 16, 2026 (gusts 81 mph)
- Pasadena, CA — October 16, 2026 (gusts 81 mph)
- Santa Clarita, CA — October 16, 2026 (gusts 81 mph)
- Lancaster, CA — May 16, 2026 (gusts 79 mph)
- Alhambra, CA — February 18, 2026 (gusts 81 mph)
- Apple Valley, CA — February 18, 2026 (gusts 93 mph)
Cite or link to this data — free
Free to quote, summarize, reuse, and link — for bloggers, journalists, researchers, contractors, and AI writing tools. No permission or credit required. A ready-made citation and link are below if they help. Terms: StormAuditor data & content license.
Citation: StormAuditor. "California Storm Data: Hail & Wind History Since 2010." Updated October 17, 2026. https://www.stormauditor.com/storm-data/ca
HTML link: <a href="https://www.stormauditor.com/storm-data/ca">California Storm Data: Hail & Wind History Since 2010 — StormAuditor</a>
About this page: built by Storm Auditor LLC from public NOAA/NWS records — deduplicated warnings, storm reports, station measurements, and official records on a rolling 12-month window, under the published methodology. See the StormAuditor Editorial Team for how content is produced.
Read more: Recent Major Storm Days in California