084 FNUS56 KLOX 261623 FWFLOX Fire Weather Planning Forecast for Southwestern California National Weather Service Los Angeles/Oxnard CA 930 AM PDT Sat Sep 26 2020 ...ELEVATED TO BRIEF CRITICAL FIRE WEATHER CONDITIONS MONDAY THROUGH FRIDAY DUE TO EXTENDED PERIOD OF HOT AND DRY CONDITIONS ALONG WITH OFFSHORE BREEZES AND PLUME DOMINATED FIRE POTENTIAL... .DISCUSSION... Over the weekend an upper level high pressure system will start to rebuild across the West Coast. This will start a modest warming trend today across the mountains, interior valleys and the Antelope Valley with similar temperatures to yesterday elsewhere as the marine layer hovers between 1500 and 2000 feet this morning. By Sunday, temperatures will be back to above normal levels across the interior as light offshore breezes (with gusts up to 25 mph) begin to develop across the Los Angeles and Ventura county mountains and Antelope Valley. A persistent upper level ridge of high pressure combined with weak offshore flow near the surface will likely bring a long duration heat wave Monday through Friday. During this time, daytime high temperatures between 95 and 105 degrees will be common across the valleys, lower mountains, and deserts, while humidities fall to between 8 and 15 percent each day. There will also be poor humidity recoveries each night across the mountains and foothills. The strongest offshore winds are still expected Monday morning into early afternoon, with gusts between 35 and 40 mph across the mountains of Los Angeles and Ventura counties, and gusts between 25 and 35 mph across the coasts and valleys. Much of next week will likely have elevated to brief critical fire weather conditions, with Monday likely having duration close to Red Flag criteria due to the gusty offshore winds. A Fire Weather Watch may need to be considered later today for Monday across some interior portions of Los Angeles and Ventura counties. The hot temperatures will also create an environment that will be favorable for plume dominated fire weather conditions, resulting in increased rates of fire spread and extreme fire behavior at times for existing and new wildfires. CAZ241-262245- Los Angeles County Coast including Downtown Los Angeles- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Morning low clouds and fog then mostly sunny. Max temperature.....69-74 beaches to 79-84 inland. 24 hr trend......Little change. Min humidity........45-65 percent. 24 hr trend......Little change. 20-foot winds.......Variable 3-6 mph becoming southwest 8-15 mph in the afternoon. Marine layer........2000 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear except areas of low clouds and fog after midnight. Min temperature.....60-66. Max humidity........80-100 percent. 20-foot winds.......Southwest 8-15 mph in the evening becoming variable 3-6 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny except areas of morning low clouds and fog. Max temperature.....71-76 beaches to 82-87 inland. Min humidity........45-65 percent. 20-foot winds.......Variable 3-6 mph becoming southwest 8-15 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ240-262245- Ventura County Coast- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Morning low clouds and fog then mostly sunny. Max temperature.....68-73 beaches to 77-80 inland. 24 hr trend......Little change. Min humidity........55-75 percent. 24 hr trend......Down 4. 20-foot winds.......Variable 3-8 mph becoming southwest 8-15 mph in the afternoon. Marine layer........1500 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear except patchy low clouds and fog after midnight. Min temperature.....58-65. Max humidity........80-100 percent. 20-foot winds.......Variable 3-6 mph in the evening becoming southeast 5-10 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny except areas of morning low clouds and fog. Max temperature.....70-75 beaches to 79-82 inland. Min humidity........55-75 percent. 20-foot winds.......Variable 3-6 mph becoming southwest 8-15 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ547-262245- Los Angeles County San Fernando Valley- Including the cities of Woodland Hills, Northridge, Burbank, and Universal City 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny except areas of morning low clouds and fog. Max temperature.....81-91. 24 hr trend......Little change. Min humidity........25-40 percent. 24 hr trend......Little change. 20-foot winds.......Variable 3-6 mph becoming south 6-12 mph with local gusts to 20 mph in the afternoon. Marine layer........2000 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....56-64 except 68-70 in the hills. Max humidity........75-100 percent. 20-foot winds.......Variable 3-8 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny. Max temperature.....82-92. Min humidity........25-40 percent. 20-foot winds.......Variable 3-6 mph becoming southeast 6-12 mph by the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ246-262245- Santa Monica Mountains Recreational Area- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Morning low clouds and fog then mostly sunny. Max temperature.....79-87 except 73-75 coastal slopes and higher peaks. 24 hr trend......Little change. Min humidity........35-55 percent except 55-65 percent coastal slopes and higher peaks. 24 hr trend......Up 7. 20-foot winds....... Valleys/lwr slopes...Variable 3-6 mph becoming southwest 8-15 mph with local canyon gusts to 30 mph in the afternoon. Ridges/upr slopes....Variable 3-6 mph becoming southwest 8-15 mph in the afternoon. Marine layer........1300 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....63-73 except 51-56 colder valleys. Max humidity........70-100 percent. 20-foot winds....... Valleys/lwr slopes...Southwest 6-12 mph with local canyon gusts to 20 mph early in the evening becoming downslope/downvalley 3-6 mph. Ridges/upr slopes....Southwest 6-12 mph in the evening becoming downslope 3-6 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny. Max temperature.....79-88 except 72-77 coastal slopes and higher peaks. Min humidity........35-50 percent except 55-65 percent coastal slopes and higher peaks. 20-foot winds....... Valleys/lwr slopes...Variable 3-6 mph becoming southwest 6-12 mph with local canyon gusts to 25 mph in the afternoon. Ridges/upr slopes....Variable 3-6 mph becoming southwest 6-12 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ548-262245- Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny except areas of morning low clouds and fog. Max temperature.....81-87. 24 hr trend......Little change. Min humidity........30-50 percent. 24 hr trend......Little change. 20-foot winds.......Variable 3-6 mph becoming southwest 6-12 mph with local gusts to 20 mph in the afternoon. Marine layer........2000 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....59-66. Max humidity........75-100 percent. 20-foot winds.......Southwest 6-12 mph with local gusts to 20 mph early becoming variable 3-6 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny. Max temperature.....82-90. Min humidity........30-50 percent. 20-foot winds.......Variable 3-6 mph becoming southwest 6-12 mph with local gusts to 20 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ288-262245- Santa Clarita Valley- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....86-91. 24 hr trend......Little change. Min humidity........18-25 percent. 24 hr trend......Little change. 20-foot winds.......North 6-12 mph becoming south 10-20 mph with gusts to 25 mph in the afternoon. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....59-67. Max humidity........45-65 percent. 20-foot winds.......Southwest 6-12 with gusts to 20 mph early becoming variable 3-6 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....89-96. Min humidity........10-20 percent. 20-foot winds.......North 6-12 mph becoming south 10-20 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ244-245-262245- Ventura County Interior Valleys-Ventura County Coastal Valleys- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny except areas of morning low clouds and fog. Max temperature.....79-88 except 72-77 nearest the coast. 24 hr trend......Little change. Min humidity........25-45 percent. 24 hr trend......Up 3. 20-foot winds.......Northeast 6-12 mph becoming southwest to west late in the afternoon. Marine layer........1500 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....53-62 except 65-70 in the hills. Max humidity........80-100 percent except 60-70 percent in the hills. 20-foot winds.......West 6-12 with gusts to 20 mph early becoming variable 3-6 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny. Max temperature.....85-95 except 74-79 nearest the coast. Min humidity........25-45 percent. 20-foot winds.......Variable 3-6 mph becoming southwest to west 6-12 mph with local gusts to 20 mph by the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ253-262245- Ventura County Mountains / Los Padres National Forest- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....81-91 low elevations to 71-78 higher elevations. 24 hr trend......Little change. Min humidity........12-25 percent. 24 hr trend......Little change. 20-foot winds....... Valleys/lwr slopes...North 10-20 mph with gusts to 25 mph becoming west 6-12 mph late in the afternoon. Strongest through the I-5 Corridor. Ridges/upr slopes....North 6-12 mph. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Clear. Min temperature.....62-72 low elevations to 46-53 colder valleys and peaks. Max humidity........30-45 percent except 55-70 percent colder valleys. 20-foot winds....... Valleys/lwr slopes...Northwest 10-20 mph with gusts to 25 mph through the I-5 Corridor. Otherwise southwest 6-12 mph in the evening. Ridges/upr slopes....Northwest 10-20 mph with gusts to 25 mph. Isolated gusts to 35 mph near Whitaker Peak. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....86-94 low elevations to 77-84 higher elevations. Min humidity........10-25 percent. 20-foot winds....... Valleys/lwr slopes...Northeast 15-25 mph in the morning shifting to the southeast 10 to 20 mph in the afternoon. Ridges/upr slopes....Northeast 15-25 mph in the morning shifting to the southeast 10 to 20 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ254-262245- Los Angeles County Mountains / Angeles National Forest- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....81-91 low elevations to 71-78 higher elevations. 24 hr trend......Little change. Min humidity........20-30 percent except 10-20 percent higher peaks and warmer valleys. 24 hr trend......Little change. 20-foot winds....... Valleys/lwr slopes...West to northwest 10-20 mph with gusts to 25 mph. Ridges/upr slopes....West to northwest 10-20 mph with gusts to 25 mph. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Clear. Min temperature.....68-75 low elevations to 59-66 colder valleys and peaks. Max humidity........25-45 percent except 50-65 percent colder valleys. 20-foot winds....... Valleys/lwr slopes...Northwest 10-20 mph with gusts to 25 mph through the I-5 Corridor. Otherwise southwest 6-12 mph in the evening. Ridges/upr slopes....Northwest 10-20 mph with gusts to 25 mph. Isolated gusts to 35 mph near Whitaker Peak. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....87-96 low elevations to 77-85 higher elevations. Min humidity........10-25 percent. 20-foot winds....... Valleys/lwr slopes...East to northeast winds 15 to 25 mph, lowering to 10 to 20 mph in the afternoon. Ridges/upr slopes....Northeast 15-25 mph. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ259-262245- Antelope Valley- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....84-94. 24 hr trend......Little change. Min humidity........8-15 percent. 24 hr trend......Little change. 20-foot winds.......West 15-25 mph. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Clear. Min temperature.....57-66 except 67-72 in the hills. Max humidity........30-50 percent. 20-foot winds.......West 15-25 mph with gusts to 30 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....88-98. Min humidity........8-15 percent. 20-foot winds.......West 6-12 mph becoming northeast 8-15 mph with gusts to 25 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ239-262245- Santa Barbara County South Coast- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Mostly sunny except areas of morning low clouds and fog. Max temperature.....74-82 except 69-71 cooler beaches. 24 hr trend......Little change. Min humidity........40-55 percent except 60-70 percent cooler beaches. 24 hr trend......Down 5. 20-foot winds.......Variable 3-6 mph becoming southwest 6-12 mph in the afternoon. Marine layer........1500 ft asl. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....51-60 except 62-67 in the hills. Max humidity........75-100 percent. 20-foot winds.......South 6-12 mph in the evening becoming east 6-12 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Mostly sunny. Max temperature.....74-82 except 69-71 cooler beaches. Min humidity........45-60 percent except 65-75 percent cooler beaches. 20-foot winds.......Variable 3-8 mph becoming southwest 6-12 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ252-262245- Santa Barbara County Mountains- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....83-90 low elevations to 74-81 higher elevations. 24 hr trend......Little change. Min humidity........15-35 percent. 24 hr trend......Down 5. 20-foot winds....... Valleys/lwr slopes...North 6-12 mph. Ridges/upr slopes....North 6-12 mph. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....68-74 low elevations to 60-66 colder valleys and peaks. Max humidity........25-45 percent except 60-70 percent colder valleys. 20-foot winds....... Valleys/lwr slopes...Northeast 6-12 mph with gusts to 25 mph. Strongest through Santa Ynez Range. Ridges/upr slopes....Northeast 6-12 mph with gusts to 25 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....86-95 low elevations to 76-84 higher elevations. Min humidity........15-35 percent. 20-foot winds....... Valleys/lwr slopes...Northeast 6-12 mph with gusts to 25 mph becoming west 6-12 mph in the afternoon. Ridges/upr slopes....Northeast 10-20 mph with gusts to 25 mph becoming southwest 6-12 mph late in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ234-235-262245- San Luis Obispo County Central Coast- Santa Barbara County Central Coast- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....63-70 beaches to 78-88 inland. 24 hr trend......Up 3. Min humidity........65-75 percent beaches to 25-40 percent inland. 24 hr trend......Down 6. 20-foot winds.......Northeast 6-12 mph becoming northwest 8-15 mph in the afternoon. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....51-60 except 62-67 in the hills. Max humidity........80-100 percent except 60-70 percent in the hills. 20-foot winds.......North 6-12 mph with gusts to 20 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....65-72 beaches to 82-92 inland. Min humidity........65-75 percent beaches to 25-45 percent inland. 20-foot winds.......Northeast 6-12 mph becoming northwest 8-15 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ236-262245- Santa Ynez Valley- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....83-92. 24 hr trend......Up 3. Min humidity........25-35 percent. 24 hr trend......Down 10. 20-foot winds.......Northeast 6-12 mph becoming north late in the afternoon. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....53-62 except 64-69 in the hills. Max humidity........80-100 percent. 20-foot winds.......Northwest 10-20 mph with gusts to 25 mph early in the evening becoming 6-12 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....82-92. Min humidity........25-35 percent. 20-foot winds.......Variable 3-6 mph becoming west 8-15 mph in the afternoon. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ237-238-262245- San Luis Obispo County Interior Valleys-Cuyama Valley- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....81-91. 24 hr trend......Little change. Min humidity........20-30 percent. 24 hr trend......Little change. 20-foot winds.......Northeast 6-12 mph becoming north 6-12 mph in the afternoon. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Clear. Min temperature.....54-63 except 67-72 in the Carrizo Plain. Max humidity........70-100 percent except 45-55 percent in the Carrizo Plain. 20-foot winds.......Northeast 6-12 mph with local gusts to 20 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....84-94. Min humidity........15-25 percent. 20-foot winds.......East 6-12 mph. LAL.................1. CWR (>0.10 IN)......0 percent. $$ CAZ251-262245- San Luis Obispo County Mountains / Los Padres National Forest- 930 AM PDT Sat Sep 26 2020 .TODAY... Sky/weather.........Sunny. Max temperature.....78-88. 24 hr trend......Little change. Min humidity........20-30 percent. 24 hr trend......Down 8. 20-foot winds....... Valleys/lwr slopes...Northeast 6-12 mph becoming north in the afternoon. Ridges/upr slopes....East 6-12 mph becoming northeast in the afternoon. Marine layer........None. LAL.................1. CWR (>0.10 IN)......0 percent. .TONIGHT... Sky/weather.........Mostly clear. Min temperature.....61-71. Max humidity........40-55 percent except 60-70 percent colder valleys. 20-foot winds....... Valleys/lwr slopes...Northeast 6-12 mph with gusts to 20 mph. Ridges/upr slopes....Northeast 10-20 mph with gusts to 25 mph. LAL.................1. CWR (>0.10 IN)......0 percent. .SUNDAY... Sky/weather.........Sunny. Max temperature.....84-94. Min humidity........15-25 percent. 20-foot winds....... Valleys/lwr slopes...Northeast 6-12 mph with gusts to 20 mph becoming west 6-12 mph late in the afternoon. Ridges/upr slopes....East 10-20 mph with gusts to 25 mph. LAL.................1. CWR (>0.10 IN)......0 percent. $$ .Extended... ...Coasts/Valleys Including the Santa Monica Range... .MONDAY...Clear. Lows in the mid 50s to upper 60s. Highs from the 70s at the beaches to 90 to 100 inland. Northeast winds 15 to 25 mph with gusts to 30 mph becoming west 10 to 20 mph late. .TUESDAY...Clear. Lows in the mid 50s to mid 60s. Highs from the lower to mid 70s at the beaches to 92 to 102 inland. Northeast winds 10 to 20 mph in the morning becoming west in the afternoon. .WEDNESDAY...Clear. Lows in the mid 50s to around 70. Highs from the 70s at the beaches to 92 to 102 inland. Northeast winds 10 to 20 mph in the morning becoming west in the afternoon. ...Mountains / Los Padres and Angeles National Forests... .MONDAY...Clear. Lows from the mid 60s to mid 70s at low elevations to the mid 50s to around 60 in colder valleys and peaks. Highs from 90 to 100 at low elevations to the mid 70s to lower 80s at high elevations. East winds 15 to 25 mph with gusts to 40 mph diminsishing to 10 to 20 mph late afternoon. .TUESDAY...Clear. Lows from the mid 60s to mid 70s at low elevations to the 50s in colder valleys and peaks. Highs from 90 to 100 at low elevations to the lower to mid 80s at high elevations. North to northeast winds 10 to 20 mph with gusts to 25 mph. .WEDNESDAY...Clear. Lows from the mid 60s to mid 70s at low elevations to the 50s in colder valleys and peaks. Highs from 90 to 100 at low elevations to the 80s at high elevations. North to northeast winds 10 to 20 mph. ...Antelope Valley... .MONDAY...Clear. Lows in the upper 50s to mid 60s except around 70 in the hills. Highs in the mid 80s to mid 90s. Northeast winds 10 to 20 mph with gusts to 30 mph. .TUESDAY...Clear. Lows in the upper 40s to mid 50s except the mid to upper 60s in the hills. Highs 90 to 100. Northeast winds 10 to 20 mph. .WEDNESDAY...Clear. Lows in the upper 50s and 60s. Highs 90 to 100. Northeast winds 10 to 20 mph. $$ Gomberg/CK WWW.WEATHER.GOV/LOSANGELES