Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

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We want your rain! Seriously, if you measure the rain we would like you to send it to us. The best way is through CoCoRaHS. By joining CoCoRaHS you'll be one of many people providing the NWS, and other weather-related agencies, vital rain and snow reports. You can even report hail and drought conditions. If you are interested, click this link.

Some places we need more observers are labeled by a star on the map below. The numbers indicated how many active observers we already have in each county. We want these numbers to grow! Will you help us? For questions, contact David Pearson.

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Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

Report Rainfall from Your Backyard! Join CoCoRaHS