SAN DIEGO (CNS) - A red flag warning signaling a heightened risk of wildfire will be in effect for San Diego County's inland valleys and mountain areas this weekend.
The red flag warning -- the most serious fire-related warning issued by the National Weather Service -- is scheduled from 11 a.m. Friday to 8 p.m. Sunday, according to the agency.
A red flag warning means that critical fire weather conditions are either occurring or will be occurring shortly. Those conditions include strong winds, low relative humidity and warm temperatures.
A moderate strength Santa Ana wind event this weekend will bring sustained winds of 15 to 25 miles per hour and gusts up to 45 mph, an NWS advisory said.
Relative humidity is expected to be no greater than 15 percent by noon Friday, and temperatures are expected to be in the high 80s in the inland valleys and mostly in the high 70s in the mountains.