Recent Major Storm Days in California

By StormAuditor Editorial Team · Published 2026-07-15 · Updated 2026-08-20

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.

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

California is known for its diverse landscapes. It also sees a variety of significant weather events. These range from coastal storms to high desert winds and mountain hail. Property owners, contractors, and insurance professionals doing date-of-loss research need this historical context. StormAuditor synthesizes official weather data to help you build a clear picture of past conditions.

California's Storm Patterns and Severe Weather

California is not typically linked with widespread severe thunderstorms like the Great Plains. Still, it is no stranger to powerful winds and, at times, significant hail. Non-thunderstorm wind events are common in many parts of the state. They often come from powerful pressure gradients and terrain effects that funnel and enhance gusts. These winds can easily exceed the severe threshold of 58 mph (50 kt) and cause widespread damage.

Hail also occurs in California, especially in inland and mountainous regions. It is less frequent, but hail can sometimes reach severe dimensions. The National Weather Service (NWS) defines that as hail 1.00 inch (quarter-sized) or larger. Even smaller hail can damage vulnerable surfaces, especially older roofing materials.

How StormAuditor Provides Historical Weather Data

StormAuditor uses a robust methodology to provide historical wind and hail estimates. For wind events, we use our SAWE-2 (Storm Auditor Wind Estimate) system. It combines background wind fields from high-resolution models with observed peak gusts from NOAA ASOS/AWOS stations and NWS Local Storm Reports (LSRs). This objective analysis creates a full map of wind activity, showing estimated maximum gusts.

For hail, our SAHE-2 (Storm Auditor Hail Estimate v2) system relies primarily on MRMS MESH (Maximum Estimated Size of Hail) data from radar. These radar-derived swaths give pixel-level estimates of hail size at the property. We complement this with SPC storm reports, which document human-observed hail sizes. We also use NWS severe thunderstorm warnings, which show areas under threat.

Remember: StormAuditor provides estimates based on the best available data. We do not measure conditions at specific properties. Our tools help users understand the likelihood and severity of historical weather events at a given location.

Recent Notable Storm Days in California

Recent storm reports show several days with notable wind activity in California. Here are some examples since March 17, 2026. They include high non-thunderstorm wind gusts and even 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

These reports highlight one point. High winds, both thunderstorm and non-thunderstorm related, are a consistent factor in California's weather landscape. Hail reports were less frequent recently. That does not mean hail is absent from California's historical record.

How to Research a Date of Loss in California

Investigating a specific date of loss in California for wind or hail events requires historical weather data. StormAuditor simplifies this process:

1. Start with the Address Lookup: Use our /address-lookup tool to get a full historical weather report for any property. Enter the address and date. You will see a detailed summary of wind, hail, and NOAA warnings that may have impacted the location.

2. Explore State-Wide Data: For broader research, use our /wind and /hail explorers. They let you visualize past events across California and spot swaths of high winds or significant hail reports.

3. Conduct Date of Loss Research: For a deeper investigation, our /date-of-loss-weather-research workflow guides you through analyzing all available data for your specific date and location.

4. Review Daily Conditions: Our /weather-on-this-date tool shows general weather conditions, such as peak gusts and precipitation, for any given day in California.

These tools help you gather the historical weather context needed for informed decisions.

Limitations of Historical Weather Data

StormAuditor provides comprehensive historical weather estimates. Even so, the data has inherent limitations you should understand. Radar-derived hail estimates (MESH) can sometimes under-estimate wet hail or over-estimate in areas of very high reflectivity. Ground-based wind stations are accurate for their specific location. Still, they may under-sample localized phenomena like microbursts. Peak gusts between stations could sometimes exceed reported values. Also, being within a NOAA warning polygon means a property was under threat. It does not confirm the property experienced the peak conditions of the storm. We provide estimates, not measurements. We do not offer legal, insurance, or engineering advice. StormAuditor does not claim to prove damage causation. That requires inspection by qualified professionals.

Related StormAuditor Tools

FAQ

When was the last major hail storm in California?

Recent data shows limited severe hail reports, but California does experience hail events. To find specific hail history for your property, use the StormAuditor /address-lookup tool. We use radar data and storm reports to identify past hail occurrences.

How do I find storm history for my California address?

Visit the StormAuditor /address-lookup page. Enter your address and the date of interest. You will receive a detailed report on historical wind, hail, and NOAA warning data.

What size hail is considered severe in California?

The National Weather Service (NWS) classifies hail as severe when its diameter is 1.00 inch (quarter size) or larger. These events can pose a risk of property damage.

What wind speed is considered damaging in California?

The NWS officially considers wind gusts of 58 mph (50 knots) or higher severe. Gusts above 70 mph can cause significant damage to structures.

Can StormAuditor tell me if my roof was damaged by a storm?

StormAuditor provides historical weather estimates at your property, such as maximum wind gusts and estimated hail sizes. We do NOT determine if your roof was damaged. That requires a physical inspection by a qualified professional, such as a roofing contractor or structural engineer.

What data sources does StormAuditor use for California historical weather?

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