rain

A map showing moisture levels carried by an atmospheric river over the West Coast including California. High moisture levels are a dark blue-green and low moisture levels are brown.

What is the Outlook for California’s Atmospheric Rivers?

Caitlin Dempsey

During the winter months, atmospheric rivers carry enormous amounts of water to the state of California.

Virga. Photo: White Sands National Monument, NPS.

What is Negative Rainfall?

Katarina Samurović

Negative rain(fall) occurs when a particular area experiences more atmospheric evaporation than water downpour over a period of time.