A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >
Storm Data...for BIS Office's Forecast Area
For the severe weather data for a particular month, choose the month and year and click "find".
Note: the data is in .pdf format, and you will need adobe acrobat to view it. Also, some data may not be available yet.
Thunderstorms & Tornadoes
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The following summaries cover "significant" or widespread thunderstorm outbreaks and tornadoes. Tornadoes, hail, wind damage, and flooding impacts can be found in these summaries. If the event was focused mainly on flooding it will be found under the "Flooding" section. |
Scroll down the page for year, or go directly:
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2025
2022
2021
2020
2019
2018
2017
2016
Historic
Flooding
The following summaries cover "significant" or widespread flooding. River and flash flooding can be found in these summaries. If the flooding event accompanied severe thunderstorms or tornado outbreaks, it will likely be included in that event's summary under the "Thunderstorms / Tornadoes" section.
2019
Historic
Winter Storms
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The following summaries cover "significant" or widespread winter storms. Heavy snow, sleet, freezing rain, and blizzards can be found in these summaries. If the event focused on wind chills, it will be found under the "Heat / Cold" section. |
Scroll down the page for year, or go directly:
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2023
2022
2021
2020
2019
2018
2017
2016
Historic
Extreme Heat & Cold
The following summaries cover "significant" or widespread high heat or extreme cold. Dangerous wind chills and life threatening heat indices can be found in these summaries. If the extreme temperatures were associated with a summer or winter storm, it may be found under the "Thunderstorms & Tornadoes" or "Winter" sections. These events tend to more "rare" compared to others, and has not been broken into yearly sections. If wished, that can be done here also (copy and past a snippet of yearly code from another section, then repeat as needed).
Other Events
The following summaries cover events that don't fall under the other categories - such as high wind events (not associated with thunderstorms). Other atmospheric events, such as auroras, may be found here.
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