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 >

National Weather Service Dissemination

National Program

Non-Weather Emergency Message (NWEM)

Weather.gov > National Weather Service Dissemination > Non-Weather Emergency Message (NWEM)
Federal, state, local, tribal and territorial public safety officials can send Non-Weather Emergency Messages (NWEMs) through the Federal Emergency Management Agency (FEMA) Integrated Public Alert and Warning System (IPAWS) in CAP v1.2 format to the National Weather Service (NWS) for broadcast over NOAA Weather Radio (NWR) All Hazards and other NWS dissemination systems (see DISSEMINATION TABLE).
To read more about NWEM click here.