4/14/2015 03:40 PM PDT

Red Flag Warning issued April 15 through April 16

The National Weather Service has issued a Red Flag Warning effective 11 PM Wednesday until 5 PM Thursday for the San Diego County mountains and foothills. Single digit humidity, strong winds and critical fire weather conditions will develop Wednesday into Thursday. Low humidity will continue Friday but with lighter winds. More forecast information and updates are available from National Weather Service.

The Santa Ana Wildfire Threat Index for San Diego (Zone 3) indicates that this is a Marginal Santa Ana event.