Værmelding for West Hills Recreation Center

Fire Weather Watch issued December 27 at 2:02PM PST until January 2 at 9:00PM PST by NWS Los Angeles/Oxnard CA...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY MORNING THROUGHTHURSDAY EVENING FOR GUSTY SANTA ANA WINDS AND LOW RELATIVEHUMIDITY FOR MUCH OF CENTRAL/WEST-CENTRAL/SOUTHWEST LOS ANGELESCOUNTY AND CENTRAL/EAST-CENTRAL/SOUTHERN VENTURA COUNTY....Confidence continues increasing that the weather pattern next week willbecome favorable for elevated to critical fire-weather conditionsacross Santa Ana wind-prone areas of Los Angeles and Ventura Counties,as well as portions of Santa Barbara County prone to north-windenhancements. Next week, an upper-level ridge is forecast to graduallybuild along the Pacific coast to the west of a large upper troughencompassing much of the central and eastern states. Correspondingly,surface high pressure strengthening over the Great Basin will facilitateincreasing offshore flow amid slight to moderate upper support, whichwill combine with unseasonably warm temperatures assisted by thebuilding upper ridge to produce the increased fire-weather risk. LAX-Bakersfield offshore gradients are currently forecast to reach 5-7 mbstarting Monday, with LAX-Daggett offshore gradients reaching 4-5 mbstarting Tuesday. Given the enhanced northerly pressure gradients, winddirections could be 10-20 degrees more northerly than easterly for thisevent compared to other November and December 2024 events, especiallyearly on for this next event.The greatest potential for critical fire-weather conditions will includeareas prone to a moderate Santa Ana wind event, for Tuesday throughnext Thursday. This includes much of Central/West-Central/Southwest LosAngeles County and Central/East-Central/Southern Ventura County.Strengthening consensus among weather-model solutions regarding thepattern favoring critical fire-weather conditions has warranted theissuance of the Fire Weather Watch.Regarding alternate scenarios, there is a 60% chance for fire-weatherheadlines to be expanded to include the eastern San Gabriels, northwestLos Angeles County Interstate-5 corridor, and northern Ventura Countymountains. In addition, the enhanced northerly gradients may tend toexpand the fire-weather risk to the east of areas more typically proneto a moderate Santa Ana wind event, to also include areas from Hollywoodto Beverly Hills and Santa Monica -- Confidence: lower chance at 40%for fire-weather headlines. Elevated to brief critical fire-weatherconditions will also be a concern farther west across the SantaBarbara County mountains and especially the Santa Ynez range whennortherly pressure gradients are strongest on Monday and Tuesday,though humidities will likely remain elevated -- Confidence:even smaller but non-zero chance at 20% for fire-weather headlines.The National Weather Service in Los Angeles/Oxnard has issued aFire Weather Watch for gusty Santa Ana winds and low relativehumidity, which is in effect from Tuesday morning through Thursdayevening.* WINDS...North to northeast winds gusting to 35 to 55 mph.* RELATIVE HUMIDITY...Relative humidities 10 to 20 percent Tuesdaydecreasing to 5 to 15 percent by Thursday.* IMPACTS...If fire ignition occurs, conditions are favorable forrapid fire spread and extreme fire behavior which would threatenlife and property.A Fire Weather Watch means that critical fire weather conditionsare likely to occur in the coming days. Residents near wildlandinterfaces should prepare now on what to do if a wildfire breaksout. See readyforwildfire.org and wildfirerisk.org forinformation..

National Weather Service

Air Quality Alert issued December 27 at 11:57AM PST by NWS Los Angeles/Oxnard CA* WHAT...The South Coast AQMD has extended a mandatory wood-burningban for residents in the South Coast Air Basin. The No-Burn rulebans burning wood, pellets, and manufactured fire logs in anyindoor or outdoor wood-burning device.* WHERE...The South Coast Air Basin, which includes Orange Countyand non-desert portions of Los Angeles, Riverside, and SanBernardino counties. No-Burn Day alerts do not apply to areas above3,000 feet in elevation, the Coachella Valley, or the High Desert.Homes that rely on wood as a sole source of heat, low-incomehouseholds and those without natural gas service also are exemptfrom the requirement.* WHEN...Friday and Saturday.* IMPACTS...Particles in smoke can get deep into the lungs and causehealth problems (including asthma attacks), increases in emergencyroom visits, and hospitalizations. No-Burn Days are needed toprotect public health when fine particle pollution levels areexpected to be high anywhere in the South Coast Air Basin. No-BurnDays are based on fine particle pollution levels that areforecasted for an entire 24-hour period, which may not be reflectedin real-time air quality maps.To protect your health, check current and forecasted air qualitylevels at www.aqmd.gov or download the mobile app atwww.aqmd.gov/mobileapp. When air quality is poor in your area,limited extended or intense outdoor activity and remain inside withwindows and doors closed. Run your air conditioner and/or an airpurifier and avoid using devices that bring in outside air like aswamp cooler or whole house fan if you have other ways to stay cool.Additional details for this air quality alert are available atwww.aqmd.gov/advisory. Information on the South Coast AQMD CheckBefore You Burn program is available at www.aqmd.gov/cbyb.

National Weather Service