Red Flag Warning
Issued by NWS Los Angeles, CA
Issued by NWS Los Angeles, CA
527 WWUS86 KLOX 222312 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 412 PM PDT Fri Aug 22 2025 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM PDT SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH... LOW RELATIVE HUMIDITY...LOCALLY GUSTY WINDS, ISOLATED DRY LIGHTNING STRIKES, AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND FOOTHILLS OF LOS ANGELES, VENTURA, SANTA BARBARA, AND SAN LUIS OBISPO COUNTIES... .A significant heatwave and increased instability, along with isolated dry lightning strikes and gusty outflow winds will continue, bringing dangerous fire-weather conditions. CAZ288-375>382-232300- /O.CON.KLOX.FW.W.0005.000000T0000Z-250824T0400Z/ Santa Clarita Valley-Santa Susana Mountains- Southern Ventura County Mountains- Northern Ventura County Mountains-Interstate 5 Corridor- Western San Gabriel Mountains and Highway 14 Corridor- Eastern San Gabriel Mountains-Western Antelope Valley Foothills- Eastern Antelope Valley Foothills- 412 PM PDT Fri Aug 22 2025 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW RELATIVE HUMIDITY...LOCALLY GUSTY WINDS...ISOLATED DRY LIGHTNING STRIKES, AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES... * TEMPERATURES...Unseasonably hot high temperatures, generally 95-110 degrees today (cooling a few degrees on Saturday), producing unstable conditions, with deep mixing heights of 12,000 to 18,000 feet. * RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent, except 20-40 percent across higher mountains. * THUNDERSTORMS...Isolated thunderstorms will be possible through the weekend, and any accompanying lightning strikes will be capable of starting new fires on the peripheries of rain cores. In addition, the environment will be favorable for strong downburst/outflow winds gusting 40 to 50 mph, capable of causing rapid fire spread. In addition, distant thunderstorms will be capable of bringing sudden wind shifts and increased fire-spread rates. * WINDS...Outside of thunderstorms, southwest at 10-20 mph gusting to 20-25 mph over the western Antelope Valley Foothills and vicinity and in other wind- favored areas such as through passes and canyons. Lighter winds elsewhere. * IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which could threaten life and property. Be aware of sudden re-direction of fires in response to passing outflow boundaries. * ADDITIONAL DETAILS...Red Flag Warning headlines may eventually need to be extended into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that fire-weather conditions are expected to be favorable for the development of extreme fire behavior. Use extreme caution with anything that can spark a wildfire. Residents near wildland interfaces should be prepared to evacuate if a wildfire breaks out. See readyforwildfire.org and wildfirerisk.org for information. && $$ CAZ238-345-351>353-232300- /O.CON.KLOX.FW.W.0005.000000T0000Z-250824T0400Z/ Cuyama Valley-San Luis Obispo County Mountains- Santa Ynez Mountains Western Range- Santa Ynez Mountains Eastern Range- Santa Barbara County Interior Mountains- 412 PM PDT Fri Aug 22 2025 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW RELATIVE HUMIDITY...LOCALLY GUSTY WINDS...AND CRITICALLY DRY FUELS FOR PORTIONS OF THE MOUNTAINS AND FOOTHILLS OF SANTA BARBARA AND SAN LUIS OBISPO COUNTIES... * TEMPERATURES...Unseasonably hot high temperatures, generally 95- 107 degrees, producing unseasonably unstable conditions, with deep mixing heights of 12,000 to 18,000 feet. * RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent. * THUNDERSTORMS...There is a 5-15 percent chance of isolated thunderstorms Saturday night through Sunday. Any accompanying lightning strikes will be capable of starting new fires on the peripheries of rain cores. In addition, the environment will be favorable for strong downburst/outflow winds gusting 40 to 50 mph, capable of causing rapid fire spread. In addition, distant thunderstorms will be capable of bringing sudden wind shifts and increased fire-spread rates. * WINDS...Diurnal wind patterns with speeds of 5-10 mph gusting to 10-20 mph, locally higher in wind-favored areas such as through passes and canyons. * IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which could threaten life and property. Be aware of sudden re-direction of fires in response to passing outflow boundaries. * ADDITIONAL DETAILS...Red Flag Warning headlines may eventually need to be extended into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that fire-weather conditions could potentially become favorable for the development of extreme fire behavior. Use extreme caution with anything that can spark a wildfire. Residents near wildland interfaces should be prepared to evacuate if a wildfire breaks out. See readyforwildfire.org and wildfirerisk.org for information. && $$ Gomberg