An inversion layer is having an unusual effect on mountain temperatures. Typically, higher elevations are colder, but in this case, the inversion layer is making the mountains warmer. This phenomenon is specific to the Bay Area mountains.

Further information on this unusual temperature pattern can be found through CBS News. They have reported on the inversion layer's impact on the region's mountain temperatures.

Details of the inversion layer and its effects are available from CBS News, providing more insight into this temperature anomaly.