The NWS Los Angeles/Oxnard CA issued a red flag warning at 4:01 p.m. on Wednesday in effect until Friday at 6 p.m. The warning is for Central Ventura County Valleys, Malibu Coast, Western Santa Monica Mountains Recreational area,

Dire warnings have been issued for the Los Angeles area, with a dangerous threat for the strongest wind event in more than a decade. Outages and extreme fire behaviours are major risks

That’s leading to the creation of mountain waves, which arise when strong winds blow perpendicular to a mountain range. The waves shoot down the coastal side of the mountains, gaining speed along the way, and are more casually referred to as simple Santa Ana winds.