City of Malibu Emergency Services

Advisory: Red Flag Warning for LA County including Malibu late tonight Sun, Oct 25 - Tues afternoon Oct 27 due to Santa Ana winds & low humidities.

Dear Pepperdine Libboard,

Red Flag Warning for LA County incl. Malibu late tonight Sun, Oct 25 - Tues Oct 27 due to Santa Anas

The National Weather Service (NWS) has issued a Red Flag Warning in effect from late tonight, Oct. 25, through Tuesday afternoon Oct. 27 for strong northeast winds and very low relative humidity for all of Los Angeles and Ventura Counties except for the Antelope Valley.

Impacts: Increased risk of fire ignitions due to strong winds downing trees and powerlines; Increased risk of power outages; If fire ignition occurs, conditions will be favorable for very rapid fire growth, extreme fire behavior, and long range spotting bringing a significant threat to life and property.

The LA County Fire Department reported that it has augmented staffing, ready for deployment and on-duty resources have been pre-identified for strike team mobility based upon the need.

The City is monitoring conditions and will send out alerts as needed.

Late Tonight through Monday Evening: High confidence for moderate to strong Santa Ana wind event. Strongest and most widespread Santa Ana event so far this season. Widespread critical Red Flag conditions for LA/Ventura counties
Most critical fire weather conditions in Southern California since October 2019 due to a combination of strong winds, very low humidities, and very dry fuels.
Particularly Dangerous Situation from 2pm to 11 pm Monday for LA County mountains due to combination of damaging wind gusts of 60 to 70 mph, single digit humidities. Live Fuel Moisture levels around 60%, and 10 hour dead fuel moistures below 7%.

Peak of the Santa Ana winds: late tonight, Oct. 25, through Monday evening Oct. 26.

LA/Ventura mountains - damaging wind gusts 60-75 mph (isolated gusts 80 mph ridgetops). Strongest winds LA County mountains (very gusty and erratic mountain wave wind conditions across San Gabriels)

LA/Ventura valleys - damaging wind gusts 50-65 mph.
Ventura coast to Malibu and Hollywood Hills - wind gusts 35-50 mph.

Humidities lowering rapidly: 15-25% late tonight into early Monday morning, lowering to single digits by late Monday morning and afternoon
RH values down to 3-5% by late Monday (especially LA county). Critically dry fuels.

Late Monday night-Tuesday: Offshore winds will likely diminish slightly late Monday night/Tuesday morning, with further decrease by Tuesday afternoon
LA/Ventura mountains - gusts 45-65 mph.

LA/Ventura valleys - gusts 25-40 mph late Monday night-Tuesday morning (isolated gusts to 50 mph foothills).

Ventura coast to Malibu and Hollywood HIlls - gusts 25-35 mph late Monday night-Tuesday morning.

Widespread single digit humidities, likely down to 3-5%.

Monitor the current conditions with the Fire Weather Snooper at: https://www.weather.gov/lox/fwmV3.