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Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

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 >

Learn about and explore a variety of historical and record-breaking weather and environmental events that have impacted the people, canyons, deserts, and mountains of northern Arizona. Each event summary includes a detailed description, meteorological figures (such as radar and satellite data), and pictures captured by the public or NWS employees. Click on each year to discover more about significant weather events in northern Arizona.

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