Santa Ana events run from roughly October through March, when high pressure over the Great Basin pushes dry air down through the passes and it accelerates on the way. The National Weather Service issues wind advisories and high wind warnings through the season, and gusts in north Orange County regularly reach damaging levels.
The damage pattern is specific. Wind lifts at the roof edge and the ridge, works under the leading edge of tiles or shingles, and breaks the seal. Often nothing looks wrong from the street. Then the first real rain arrives and water goes straight into the deck through the compromised course.
Elevation and exposure decide who gets hit. Bastanchury, Rolling Hills, Coyote Hills and the ridge properties in Sunny Hills take the strongest gusts, and the mature eucalyptus, pine and pepper trees across the older neighbourhoods add falling-limb damage.
The practical advice: after any significant wind event, walk the perimeter and look up. Finding a lifted tile in November is a hundred-dollar repair. Finding it in February because your ceiling is stained is a restoration job.