Chilly for B.C. as Pineapple Express heads south, triggers California floods

B.C. remains in a deep, active trough through Christmas, as the impactful Pineapple Express moves south, impacting nearly all of California through Friday.

Flood watches cover over 40 million people in California and Nevada, spanning over 1,000 km, including the Bay Area, San Jose, Los Angeles, and San Diego.

The U.S. National Weather Service warns moderate to heavy rain may cause rapid creek and stream rises, with standing water likely in urban areas and roads.

DON'T MISS: What’s a Pineapple Express? Diving into this robust atmospheric river

This strong atmospheric river will bring significant rainfall and mountain snowfall. A winter storm warning is in effect for the Sierras, with up to 150 cm of snowfall expected.

Another heavy helping of snow for Christmas ski plans in British Columbia

In B.C., alpine snow continues across the coastal mountains, with an additional 30-50+ cm possible before Christmas, benefiting holiday ski plans.

There’s a chance for low elevation snow in the eastern Lower Mainland on Wednesday, though uncertainty remains regarding freezing levels.

WATCH: Unusually warm Christmas for parts of the U.S. and Canada

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