####018002955#### FNUS22 KWNS 201952 FWDDY2 Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0152 PM CST Mon Jan 20 2025 Valid 211200Z - 221200Z ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE SANTA MONICA MOUNTAINS AND SANTA SUSANA MOUNTAINS...INCLUDING THE MALIBU COAST... ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE EASTERN SAN DIEGO FOOTHILLS INTO THE WESTERN SAN JACINTO MOUNTAINS... ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA... The previous forecast (see below) remains on track, and only minor adjustments were made to the Day 2/Tuesday outlook. Most noteworthy, the Extremely Critical highlights along the San Jacinto Mountains were expanded slightly northward toward the San Bernardino Mountains in northern Riverside County. The latest high-resolution guidance is in very good agreement here, depicting a gap-flow enhancement to the winds -- favoring several hours of sustained surface winds around 40 mph (with higher gusts) amid single-digit RH. Localized extremely critical conditions are also possible along the Santa Ana Mountains during the morning/early afternoon hours. ..Weinman.. 01/20/2025 .PREV DISCUSSION... /ISSUED 0208 AM CST Mon Jan 20 2025/ ...Synopsis... A strong Santa Ana wind event beginning Monday afternoon will persist well into Tuesday afternoon and evening, resulting in widespread Critical and Extremely Critical fire-weather conditions across much of Southern California. ...Extremely Critical fire-weather conditions for the San Gabriel, Santa Monica, and Santa Susana Mountains... Extremely Critical fire-weather conditions will persist from the Day 1 outlook period (Mon) well into Day 2 (Tues). Sustained winds of 40-45 MPH (gusting 70-100 MPH on mountains, 50-80 MPH in the valleys/coastal regions) with single-digit relative humidity values as low as 2%-5% will be ongoing at the start of the period, subsiding by late Tuesday afternoon/early Tuesday evening. For more details, see the current Day 1 fire-weather outlook. ...Extremely Critical fire-weather conditions for portions of the eastern San Diego foothills into the western San Jacinto Mountains... Confidence has increased in strong, dry offshore flow across far Southern California, particularly portions of the eastern San Diego foothills into the San Jacinto Mountains. Recent 00Z HREF guidance shows ensemble mean sustained surface winds as high as 50-55 MPH, with the ensemble maximum as high as 60 MPH and gusts as high as 80 MPH. Coupled with single-digit relative humidities, this will result in several hours of Extremely Critical fire-weather conditions supportive of rapid wildfire onset and spread, subsiding by late Tuesday evening into Wednesday morning. ...Please see www.spc.noaa.gov/fire for graphic product... $$