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Climate & Environment

Major rainfall now expected for week of Christmas

The view through a car window of a rainy LA; there are water drops on the glass, four windblown palm trees are silhouetted against a grey sky, and the Chase sign on a bank building glows white and blue in the eerie light.
Heavy rain in Marina Del Rey a few years back.
(
Suzanne Levy
/
LAist
)

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Topline:

The National Weather Service is now forecasting major rainfall for the week of Christmas in L.A. and Ventura counties.

Storm duration: The heaviest rain is expected to arrive late Tuesday night into Wednesday day. Less intense rain is expected to stick around through Christmas until Saturday, according to the weather service.

A map with different areas denoted in orange and red, indicating rain fall levels.
Rainfall total from the storm arriving Christmas week, according to the National Weather Service on Saturday.
(
Courtesy National Weather Service
)

How much rain? In all, about  4 to 6 inches of rain is expected for the coast and valleys in L.A. and Ventura counties from the storm, and between 6 to 12 inches for the foothills and mountains.

Impact: "We could see significant and damaging mudslides and rock slides. We could see flooded freeways and closures," said David Gomberg, lead forecaster at NOAA in a weather briefing on Saturday.

Winds: Damaging winds are also in the forecast, particularly between Tuesday night and Wednesday  in the mountains and foothills, Gomberg said, potentially resulting in  downed trees and power outages.

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