What to Know

  • A Pineapple Express storm that will dump several inches of rain across most of the region.
  • The heaviest rainfall is expected to arrive late Tuesday, heading into Christmas Eve on Wednesday.
  • A flood watch was issued beginning Tuesday afternoon for much of LA County and recent burn scar areas.
  • Monday’s high temperature is expected to reach 67 degrees in downtown LA, then decrease gradually to 59 on Friday.

Southern California is in for a wet Christmas week, with four days of rain expected to begin Tuesday, forecasters said Sunday.

A flood watch was issued for Tuesday afternoon through Wednesday evening for much of Los Angeles County, with mud and debris flows possible across foothill and mountain areas, including recent burn scars, according to the National Weather Service.

Rain is expected to arrive in multiple waves starting late Tuesday and continuing through Saturday, with varying amounts each day, according to NBC4 Meteorologist Belen De Leon.

Here’s a rain timeline:

Tuesday: The system will bring light to moderate showers with less than a half-inch of rain expected.

Wednesday (Christmas Eve): The heaviest part of the storm will start early Wednesday with heavy rainfall expected on Christmas Eve along with “very strong wings,” accoridingt ot he National Weather Service.

Thursday (Christmas): While the worst of the storm will likely be Wednesday, periods of rain, possibly heavy at times, are expected on Christmas Day. 

Friday-Saturday: Moist south to southwest flow will continue to usher in sporadic showers to the area Friday
and Saturday, though rain amounts by that time should be under a quarter inch per hour.

Possible hazards include flooding concerns, hazardous mountain conditions and could cause major travel disruptions throughout the week. The forecast prompted city officials on Friday to take preparations for the expected rainfall.

Snow is not expected to be a major factor with this event, with levels dropping to around 7,000 feet Thursday and Friday.



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