As the wind flows over the Sierra Nevada and Santa Ana mountains, it drops from high elevation to sea level. The sinking air becomes compressed and heats up, and its relative humidity drops.

Weak to moderate Santa Ana winds begin this evening and last through tomorrow. The most persistent winds will be in the Riverside/San Diego County mountains and eastern valleys. Elevated fire ...

As they move down the Santa Ana and Sierra Nevada mountains and shoot through valleys, the winds compress -- creating a rise in their temperature and a drop in their relative humidity. With hot, dry ...

As another round of wild Santa Ana winds threatens Southern ... The National Weather Service said powerful winds will blow from the Great Basin in Nevada through mountain and canyon passes ...

The intense and fast-moving fires that have cut a path of destruction through the suburbs of Los Angeles, killing at least two people, are being driven by the region’s powerful Santa Ana winds ... out ...

Shifting weather patterns will produce a taste of summer, along with stiff Santa Ana winds ... The northeasterly winds are expected to exceed 40 mph in mountains and passes, including the San ...