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 >

F6 - Climate Data 

 These data sets are preliminary and have not undergone final QC by NCDC.
Therefore, these data are subject to revision.  Final and certified climate data can be accessed at the 
National Climatic Data Center (NCDC)
- www.ncdc.noaa.gov.


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Understanding the F6 Document

 

 

 

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These data are preliminary and have not undergone final QC by NCDC. Therefore, these data are subject to revision. Final and certified climate data can be accessed at the 
National Climatic Data Center (NCDC) - www.ncdc.noaa.gov.