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How do avalanches develop?

Wednesday's fatal avalanche at Palisades Tahoe led many people to ask how avalanches develop. Meteorologist Tracy Humphrey explains.

Jan 11, 2024 (01:35)

Manteca police issue more than 13,000 red-light citations this year

Manteca police issue more than 13,000 red-light citations this year

Newsom responds to President Trump's "take out" California cities remarks

Newsom responds to President Trump's "take out" California cities remarks

Sacramento's Highway 50 helicopter crash 1 year later: Part 2

Sacramento's Highway 50 helicopter crash 1 year later: Part 2

Summer-like heat isn’t stopping fall fun at Apple Hill

Summer-like heat isn’t stopping fall fun at Apple Hill

Tuesday evening Northern California weather forecast: Oct. 6, 2026

Tuesday evening Northern California weather forecast: Oct. 6, 2026

Family remembers beloved flight nurse 1 year after fatal Sacramento helicopter crash

Family remembers beloved flight nurse 1 year after fatal Sacramento helicopter crash

Sacramento's Highway 50 helicopter crash 1 year later: Part 1

Sacramento's Highway 50 helicopter crash 1 year later: Part 1

More women are farming as California's Central Valley ag inudstry looks to next generation

More women are farming as California's Central Valley ag inudstry looks to next generation

Tuesday afternoon Northern California weather forecast - Oct. 6, 2026

Tuesday afternoon Northern California weather forecast - Oct. 6, 2026

Sacramento outbuilding fire sparks concern for missing man before he contacts family

Sacramento outbuilding fire sparks concern for missing man before he contacts family

Fire destroys 1 home, damages 2 others in Modesto

Fire destroys 1 home, damages 2 others in Modesto

Man killed by Sacramento deputies in Arden identified by family

Man killed by Sacramento deputies in Arden identified by family

Newsom vetoes delta levee funding bill, citing existing state budget money

Newsom vetoes delta levee funding bill, citing existing state budget money

New sideshow deterrent installed at North Stockton intersection

New sideshow deterrent installed at North Stockton intersection

October heat raises fire danger across Northern California as temperatures near 100

October heat raises fire danger across Northern California as temperatures near 100

More things to know as California begins mailing November ballots

More things to know as California begins mailing November ballots

Monday evening Northern California weather forecast: Oct. 5, 2026

Monday evening Northern California weather forecast: Oct. 5, 2026

California mail-in ballots for November election begin going out

California mail-in ballots for November election begin going out

Sacramento theater hosts improv show for local deaf community

Sacramento theater hosts improv show for local deaf community

West Sacramento man was arrested in child sex exploitation case, detectives seek additional victims

West Sacramento man was arrested in child sex exploitation case, detectives seek additional victims

Monday afternoon Northern California weather forecast - Oct. 5, 2026

Monday afternoon Northern California weather forecast - Oct. 5, 2026

Chocolate navel oranges | Lunch Break with Michael Marks

Chocolate navel oranges | Lunch Break with Michael Marks

Sacramento congressional race tests Kevin Kiley's break from Republican Party

Sacramento congressional race tests Kevin Kiley's break from Republican Party

Doris Matsui, Mai Vang clash over experience and change in Sacramento congressional debate

Doris Matsui, Mai Vang clash over experience and change in Sacramento congressional debate

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