National Weather Service United States Department of Commerce

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 >

Foreign Travel, Training, and Technical Assistance

The International Activities Office (IAO) supports the National Weather Service in various administrative areas related to international programs and activities. These support activities include coordinating foreign travel for NWS employees and coordinating the visits of foreign delegations and students coming to the NWS for various purposes.