Gusts of fierce wind sway palm trees. Photo via Pixabay.
Gusts of fierce wind sway palm trees. Photo via Pixabay.

Cold, strong and potentially damaging Santa Ana winds will spread throughout San Diego County Friday.

National Weather Service wind advisories for the mountains, valleys and deserts are in effect from 9 a.m. Friday to 2 p.m. Saturday. Winds of 20 to 30 miles per hour and gusts up to 50 mph are expected.

Forecasters said gusts could reach 60 mph along coastal mountain slopes.

Daytime temperatures in the San Diego area on Friday will be in the high 50s to mid 60s, and lows overnight could drop into the high 30s.

The winds may make for hazardous driving conditions, especially for motorists in high-profile vehicles. The weather service said “blowing dust, tree damage, minor structural damage and extreme cross-winds” would be possible along portions of Interstate 8 between Alpine and the Imperial County line.

Sustained wind speeds of 40 mph or more or gusts of at least 58 mph can cause property damage.

The offshore winds will begin to dissipate Saturday afternoon, followed by warmer weather and only light winds on Sunday. However, forecasters said another round of moderate to potentially strong offshore winds would be possible later next week.

City News Service contributed to this article.

Chris Jennewein is founder and senior editor of Times of San Diego.