Recent Major Storm Days in California

By StormAuditor Editorial Team · Published 2026-07-15 · Updated 2026-09-23

Based on public NOAA and National Weather Service records, published under StormAuditor's methodology and data-source standards. Radar-derived hail sizes are estimates unless attributed to a ground report.

Summer thunderstorm clouds building above pine trees in California's Sierra Nevada — Photo: David Prasad · CC BY-SA 2.0 · cropped, resized

Damage-threshold ranges in this article are general guidance synthesized from industry and federal research — IBHS building-performance research, NWS severe criteria, and product standards such as UL 2218 (hail impact resistance) and ASTM D3161/D7158 (shingle wind ratings). Actual performance depends on product rating, age, installation quality, exposure, and impact characteristics — thresholds describe when damage becomes possible, not when it occurs.

California experiences a wide range of weather events. StormAuditor provides historical storm data for understanding past wind and hail activity across the state.

California has varied landscapes, and varied weather to match. Storms range from coastal storms to high desert winds and mountain hail. Property owners, contractors, and insurance staff doing date-of-loss research need this history. StormAuditor pulls official weather data together to give you a clear picture of past conditions.

California's Storm Patterns and Severe Weather

California is not known for widespread severe thunderstorms like the Great Plains. But it does get powerful winds and, at times, significant hail.

Wind: Non-thunderstorm wind events are common in many parts of the state. Strong pressure differences and terrain often funnel the wind and make gusts stronger. These winds can easily top the severe level of 58 mph (50 kt) and cause widespread damage.
Hail: Hail falls in California too, mainly inland and in the mountains. It is less frequent, but it can reach severe size. The National Weather Service (NWS) defines severe hail as 1.00 inch (quarter size) or larger. Even smaller hail can damage weak surfaces, mainly older roofing.

How StormAuditor Gives Historical Weather Data

StormAuditor's wind and hail estimates come from two published methods.

Wind. Our SAWE-2 (Storm Auditor Wind Estimate) system starts from the NWS analysis of record (URMA). HRRR is the fallback. It corrects that with peak gusts seen at NOAA ASOS/AWOS stations and in NWS Local Storm Reports (LSRs). This objective analysis builds a full map of wind, with estimated maximum gusts.

Hail. Our SAHE-2 (Storm Auditor Hail Estimate v2) system relies mainly on MRMS MESH (Maximum Estimated Size of Hail) radar data. These swaths give a hail size estimate for each grid cell at the property. We add SPC storm reports, which record hail sizes people saw. We also use NWS severe thunderstorm warnings, which show areas under threat.

StormAuditor gives estimates from the best available data. We do not measure conditions at individual properties. Our tools help you understand how likely and how severe past weather was at a location.

Recent Notable Storm Days in California

Recent storm reports show several days with notable wind in California. Examples since March 17, 2026, including strong non-thunderstorm gusts and a thunderstorm wind event:

June 28, 2026 — 2 NW Indian Wells Valle — 76.0 mph Non-Thunderstorm Wind Gust
June 27, 2026 — 11 SE Weldon — 80.0 mph Non-Thunderstorm Wind Gust
June 26, 2026 — 11 SE Weldon — 70.0 mph Non-Thunderstorm Wind Gust
June 19, 2026 — 3 NNW Meyers — 61.0 mph Thunderstorm Wind Gust
June 07, 2026 — 11 SE Weldon — 67.0 mph Non-Thunderstorm Wind Gust

High winds, from thunderstorms and from other causes, are a steady part of California's weather. Hail reports were less frequent recently. That does not mean hail is missing from California's record.

How to Research a Date of Loss in California

To research a date of loss in California for wind or hail, you need weather history. StormAuditor makes it simple:

Start with Address Lookup: Use our Address Lookup tool for a full weather history at any property. Enter the address and date. You get a detailed summary of wind, hail, and NOAA warnings that may have hit the location.
Explore statewide data: Use our Wind Explorer and Hail Explorer explorers to see past events across California. Spot swaths of high wind or significant hail reports.
Do date-of-loss research: For a deeper look, our Date of Loss Weather Research workflow walks you through all the data for your date and place.
Check daily conditions: Our Weather on This Date tool shows general weather, such as peak gusts and rainfall, for any day in California.

These tools give you the weather context you need to make informed decisions.

Limits of Historical Weather Data

StormAuditor gives full weather history estimates. Still, the data has Limitations you should know:

Radar hail estimates (MESH) can under-estimate wet hail. They can over-estimate where reflectivity is very high.
Wind stations are accurate where they stand. But they may miss local events like microbursts, so peak gusts between stations can be higher than reported.
A property inside a NOAA warning area was under threat. That does not confirm it got the storm's peak.
We give estimates, not measurements. We do not give legal, insurance, or engineering advice. StormAuditor does not claim to prove what caused damage. That takes inspection by qualified professionals.

Related StormAuditor Tools

FAQ

When was the last major hail storm in California?

Recent data shows few severe hail reports, but California does get hail. To find hail history for your property, use the StormAuditor Address Lookup tool. We use radar data and storm reports to find past hail.

How do I find storm history for my California address?

Go to the StormAuditor Address Lookup page. Enter your address and the date you care about. You get a detailed report on past wind, hail, and NOAA warnings.

What size hail is severe in California?

The National Weather Service (NWS) calls hail severe at 1.00 inch (quarter size) or larger. Hail that size can put property at risk.

What wind speed is damaging in California?

The NWS officially calls gusts of 58 mph (50 knots) or more severe. Gusts above 70 mph can do significant damage to buildings.

Can StormAuditor tell me if a storm damaged my roof?

StormAuditor gives weather estimates at your property, such as maximum wind gusts and estimated hail sizes. We do NOT decide whether your roof was damaged. That takes a physical inspection by a qualified professional, such as a roofing contractor or structural engineer.

What data sources does StormAuditor use for California weather history?

Official data from NOAA, NWS severe weather warnings, SPC storm reports, IEM archives, the NCEI Storm Events Database, and MRMS MESH radar data. For daily conditions, we use the NOAA URMA analysis of record and NOAA ASOS/AWOS station data. Our Data Sources page lists them all.