The San Fernando Valley is known for its windy days. A recent Santa Ana Wind event toppled trees and downed powerlines throughout the LA area, with winds 35 to 45 mph, and reaching up to 70 mph in parts of the LA County and the Inland Empire. Here is some footage from one windy day on the LA River.
Wonderful pictures. Nature does force its way through the unseen places in the Valley, making it all good.