Alert archive / California / Red Flag Warnings in 2017
Red Flag Warning 5, NWS Los Angeles, CA
NWS Los Angeles, CA issued this red flag warning at Oct 5, 2017, 9:36 AM PDT for Los Angeles County, California. It took effect at Oct 6, 2017, 6:00 AM PDT. It was in force for 14 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 5, 2017, 9:36 AM PDT (16:36 UTC)
- In effect from
- Oct 6, 2017, 6:00 AM PDT
- Expired
- Oct 6, 2017, 8:00 PM PDT
- In force
- 14 hr
- Issued by
- NWS Los Angeles, CA
County Los Angeles County, CA
The radar
The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 16:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Edwards AFB, CA (KEDW), launched 12:00Z, 4.6 hours before the alert went out and 89 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2816 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
375 WWUS86 KLOX 051636 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 936 AM PDT Thu Oct 5 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY... .Warm and very dry conditions will combine with gusty offshore winds to create elevated fire weather danger through Saturday. A Red Flag Warning is in effect on Friday for the areas where the winds are the strongest for the longest duration, which include the Los Angeles and Ventura County mountains as well as the Santa Clarita Valley. There is a chance that the warning may need to be expanded into the Santa Monica Mountains...and extended into Saturday. CAZ253-254-288-060045- /O.NEW.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 936 AM PDT Thu Oct 5 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from 6 AM to 8 PM PDT Friday. * Winds...Northeast 15 to 25 mph with gusts to 40 mph...strongest late Friday morning and afternoon. * Relative Humidity...Minimum of 6 to 12 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Kittell
5 follow-up statements
128 WWUS86 KLOX 052219 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 319 PM PDT Thu Oct 5 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY... .Warm and very dry conditions will combine with gusty offshore winds to create elevated fire weather danger through Saturday. A Red Flag Warning is in effect on Friday for the areas where the winds are the strongest for the longest duration, which include the Los Angeles and Ventura County mountains as well as the Santa Clarita Valley. There is a chance that the warning may need to be expanded into the Santa Monica Mountains...and extended into Saturday. CAZ253-254-288-061700- /O.CON.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 319 PM PDT Thu Oct 5 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM TO 8 PM PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY... * Winds...Northeast 15 to 25 mph with gusts to 40 mph. Strongest late Friday morning and afternoon. * Relative Humidity...Minimum of 6 to 12 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Kittell
330 WWUS86 KLOX 060721 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 1221 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY... .Warm and very dry conditions will combine with gusty offshore winds to create elevated fire weather danger through Saturday. A Red Flag Warning is in effect today for the areas where the winds are the strongest for the longest duration, which include the Los Angeles and Ventura County mountains including the Santa Monica Range as well as the Ventura County Valleys and the Santa Clarita Valley. CAZ246-061530- /O.EXA.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/ Santa Monica Mountains Recreational Area- 1221 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from 6 AM to 8 PM PDT this evening. * Winds...Northeast 15 to 25 mph with gusts up to 40 mph. Isolated gusts to 45 mph. Winds will be strongest across the northern portion from Malibu to the Ventura County border. Winds should taper off a litter earlier in the afternoon then the inland mountains, but relative humidities will be below 10 percent by this afternoon. * Relative Humidity...as low as 8 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ244-245-061530- /O.EXA.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- 1221 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT FROM 6 AM TO 8 PM PDT TODAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from 6 AM to 8 PM PDT this evening. * Winds...Below passes and canyons...northeast 15 to 25 mph with gusts up to 30 mph. Local gusts to 40 mph in the hills. Winds will be strongest across the eastern portion of the valleys. * Relative Humidity...as low as 8 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ253-254-288-061530- /O.CON.KLOX.FW.W.0005.171006T1300Z-171007T0300Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 1221 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 6 AM TO 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... * Winds...northeast 15 to 25 mph with gusts up to 40 mph. Local gusts to 45 mph in the mountains. * Relative Humidity...as low as 7 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Kaplan/Kittell
523 WWUS86 KLOX 061300 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 600 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY... .Warm and very dry conditions will combine with gusty offshore winds to create elevated fire weather danger through Saturday. A Red Flag Warning is in effect today for the areas where the winds are the strongest for the longest duration, which include the Los Angeles and Ventura County mountains including the Santa Monica Range as well as the Ventura County Valleys and the Santa Clarita Valley. CAZ253-254-288-062100- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 600 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... * Winds...northeast 15 to 25 mph with gusts up to 40 mph. Local gusts to 45 mph in the mountains. * Relative Humidity...as low as 7 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ246-062100- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Santa Monica Mountains Recreational Area- 600 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... * Winds...Northeast 15 to 25 mph with gusts up to 40 mph. Isolated gusts to 45 mph. Winds will be strongest across the northern portion from Malibu to the Ventura County border. Winds should taper off a litter earlier in the afternoon compared to the inland mountains. * Relative Humidity...as low as 8 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ244-245-062100- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- 600 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS... * Winds...Below passes and canyons...northeast 15 to 25 mph with gusts up to 30 mph. Local gusts to 40 mph in the hills. Winds will be strongest across the eastern portion of the valleys. * Relative Humidity...as low as 8 percent. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Kaplan/Kittell
322 WWUS86 KLOX 061620 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 920 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF LOS ANGELES AND VENTURA EXCEPT THE ANTELOPE VALLEY... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO COUNTY MOUNTAINS... .Warm and very dry conditions will combine with gusty offshore winds to create elevated fire weather danger through Saturday. A Red Flag Warning is in effect today for the areas where the winds are the strongest for the longest duration, which include the Los Angeles and Ventura County mountains including the Santa Monica Range as well as the Ventura County Valleys and the Santa Clarita Valley. A stronger offshore event is expected between Monday morning and Tuesday morning with stronger winds expected with critically dry conditions continuing. CAZ253-254-288-070030- /O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 920 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from early Monday morning through Tuesday morning. * Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph will continue through this evening. Local gusts to 45 mph in the mountains. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds could potentially increase 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ246-070030- /O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Santa Monica Mountains Recreational Area- 920 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from early Monday morning through Tuesday morning. * Winds...Northeast 15 to 25 mph with gusts up to 40 mph will continue through this evening. Isolated gusts to 45 mph. Winds will be strongest across the northern portion from Malibu to the Ventura County border. Winds should taper off a litter earlier in the afternoon compared to the inland mountains. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds could potentially increase 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ244-245-070030- /O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- 920 AM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR VENTURA COUNTY VALLEYS... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from early Monday morning through Tuesday morning. * Winds...Below passes and canyons...northeast 15 to 25 mph with gusts up to 30 mph will continue through this evening. Local gusts to 40 mph in the hills. Winds will be strongest across the eastern portion of the valleys. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds could potentially increase 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ240-241-547-548-070030- /O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ Ventura County Coast- Los Angeles County Coast including Downtown Los Angeles- Los Angeles County San Fernando Valley- Los Angeles County San Gabriel Valley- 920 AM PDT Fri Oct 6 2017 ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from early Monday morning through Tuesday morning. * Winds...A moderate to strong offshore event is expected between Monday morning and Tuesday morning. Northeast winds could potentially increase 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ237-238-251-070030- /O.NEW.KLOX.FW.A.0004.171009T1200Z-171010T0300Z/ San Luis Obispo County Interior Valleys-Cuyama Valley- San Luis Obispo County Mountains / Los Padres National Forest- 920 AM PDT Fri Oct 6 2017 ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO COUNTY MOUNTAINS... THE NATIONAL WEATHER SERVICE IN Los Angeles/Oxnard HAS ISSUED a Fire Weather Watch FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT from early Monday morning through Monday evening. * Winds...A moderate offshore event is expected between Monday morning and Tuesday morning. East winds could potentially increase 15 to 25 mph with gusts up to 40 mph on Monday and linger through Monday evening. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Monday evening. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Hall
211 WWUS86 KLOX 061955 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 1255 PM PDT Fri Oct 6 2017 ...RED FLAG WARNING IN EFFECT THROUGH 8 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS ANGELES COUNTY MOUNTAINS INCLUDING THE SANTA MONICA MOUNTAINS AS WELL AS THE VENTURA COUNTY VALLEYS AND THE SANTA CLARITA VALLEY... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR MOST OF LOS ANGELES AND VENTURA EXCEPT THE ANTELOPE VALLEY... ...FIRE WEATHER WATCH IN EFFECT FROM EARLY MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SAN LUIS OBISPO COUNTY AND CUYAMA VALLEYS AND THE SAN LUIS OBISPO COUNTY MOUNTAINS... .An offshore flow pattern will linger into Saturday keeping a warm and very dry weather pattern in place. Low relative humidities will combine with marginally gusty offshore winds to create elevated fire weather danger through Saturday. The flow pattern will shift to onshore flow over the weekend but then quickly reverse back to offshore flow through Monday. A moderate offshore event is forecast between Monday morning and Tuesday morning. Gusty offshore winds will combine with dry conditions and fuels in place to likely bring critical fire weather conditions to portions of Southwest California with near critical fire weather conditions elsewhere. CAZ253-254-288-070300- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ /O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ Ventura County Mountains / Los Padres National Forest- Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 1255 PM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS AS WELL AS THE SANTA CLARITA VALLEY... * Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph will continue through this afternoon then slowly diminish through this evening. Local gusts to 45 mph are possible in the mountains. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds will likely increase to 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ246-070300- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ /O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ Santa Monica Mountains Recreational Area- 1255 PM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA MONICA MOUNTAINS... * Winds...Northeast winds 15 to 25 mph with gusts up to 40 mph will continue through this afternoon then slowly diminish through this evening. Isolated gusts to 45 mph are possible. Winds will be strongest across the northern portion from Malibu to the Ventura County border. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds will likely increase to 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ244-245-070300- /O.CON.KLOX.FW.W.0005.000000T0000Z-171007T0300Z/ /O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- 1255 PM PDT Fri Oct 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA COUNTY VALLEYS... * Winds...Below passes and canyons...northeast winds 15 to 25 mph with gusts up to 30 mph will continue through this afternoon then slowly diminish this evening. Local gusts up to 40 mph are possible in the hills. Winds will be strongest across the eastern portion of the valleys. A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds will likely increase to 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will fall to 7-15 percent today through this evening and likely again Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. Use extreme caution when using potential fire ignition sources. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ240-241-547-548-070300- /O.CON.KLOX.FW.A.0004.171009T1200Z-171010T1700Z/ Ventura County Coast- Los Angeles County Coast including Downtown Los Angeles- Los Angeles County San Fernando Valley- Los Angeles County San Gabriel Valley- 1255 PM PDT Fri Oct 6 2017 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING THROUGH TUESDAY MORNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE VENTURA AND LOS ANGELES COUNTY AND THE LOS ANGELES COUNTY VALLEYS... * Winds..A stronger offshore event is expected between Monday morning and Tuesday morning. Northeast winds will likely increase to 20 to 35 mph with gusts up to 50 mph on Monday and linger into Tuesday morning. * Relative Humidity...Humidities will likely fall to 7-15 percent Monday morning through Tuesday morning. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ CAZ237-238-251-070300- /O.CON.KLOX.FW.A.0004.171009T1200Z-171010T0300Z/ San Luis Obispo County Interior Valleys-Cuyama Valley- San Luis Obispo County Mountains / Los Padres National Forest- 1255 PM PDT Fri Oct 6 2017 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM EARLY MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR INTERIOR SAN LUIS OBISPO COUNTY AND THE CUYAMA VALLEY... * Winds...A moderate offshore event is expected between Monday morning and Monday evening. East winds will likely increase to 15 to 25 mph with gusts up to 40 mph on Monday and linger through Monday evening. * Relative Humidity...Humidities will likely fall to 7-15 percent Monday morning through Monday evening. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Hall
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Los Angeles, CA wrote its last area forecast discussion before this red flag warning went out at Oct 5, 9:30 AM PDT, 6 minutes earlier.
Area forecast discussion, Oct 5, 9:30 AM PDT, 6 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
930 AM PDT Thu Oct 5 2017
.SYNOPSIS...
The offshore winds, gusty at times, should warm the temperatures
into Saturday with the skies mostly clear. The onshore flow will
increase the overnight marine layer into Sunday and drop the
temperatures. Breezy offshore winds should start a warming trend
from Tuesday to Wednesday. A low system will approach on Thursday.
&&
.SHORT TERM...(TDY-SAT)
Forecast on track for the next few days as offshore flow takes
over through Saturday. Temps already trending warmer today with
light offshore flow in place and sunny skies. The NAM was a
little weaker with the upper support Friday but still enough to
keep a wind advisory in the conversation. It would be marginal at
this point and leaning towards not issuing one with the afternoon
forecast. Gradients are a little stronger Saturday but upper
support peaks Friday morning so Friday should have the best chance
for advisory level winds if they occur. Forecast temps seem in
line with past events of this magnitude, mainly 80s to around 90
for the coastal areas Friday and a few degrees warmer Saturday.
Valleys well into the 90s to around 100.
.LONG TERM...(SUN-WED)
For the extended, 00Z models in good agreement on Sunday then
diverge noticeably Monday through Wednesday. On Sunday, both the
GFS and ECMWF drop an upper low into the Great Basin. This will
result in an increase in onshore flow as well as a noticeable
influx of cooler air. So, Sunday will be noticeably cooler for all
areas with some stratus likely Sunday morning across the Los
Angeles coastal plain.
For Monday through Wednesday, the forecast gets more muddled as
the model solutions diverge. The GFS keeps the upper low spinning
over the Great Basin Monday and Tuesday while the ECMWF pushes the
low eastward. However, both models indicate rather strong offshore
gradients (LAX-DAG gradients ranging generally between -3.0
and -5.0 MB) both Monday and Tuesday. The GFS solution indicates
much better upper level support than the ECMWF. So, basically the
GFS solution would be a moderate to locally strong Santa Ana while
the ECMWF would likely be a weak Santa Ana event. Hopefully, the
models will come into a better consensus for Monday and Tuesday.
For Wednesday, both models indicate rising H5 heights as ridge
builds overhead with weaker offshore flow. So, Wednesday should be
warmer for all areas with some sub- advisory northeasterly winds.
&&
.AVIATION...05/1145Z.
At 11Z, there was a weak surface based inversion at KLAX. The top
of the inversion was around 2500 feet with a temperature of 21C.
Clear skies across the region this morning, and VFR conditions are
expected across the entire areas through the period.
KLAX...High confidence in the 12Z TAF with VFR conditions
expected through the period.
KBUR...High confidence in the 12Z TAF with VFR conditions
expected through the period.
&&
.MARINE...05/900 AM.
For the Outer Waters, SCA winds are not expected until this
afternoon so the SCA has been delayed until then. There is a 30%
chance that the winds will reach SCA levels again late Fri
afternoon and evening, then are likely late Sat afternoon through
Sun evening, especially across the northern two thirds of the
outer waters.
For the Inner Waters, good confidence in current forecast. For
the waters north of Point Sal, there is a 20-30% chance of SCA
level winds this afternoon and evening. Winds are expected to
remain below SCA levels on Friday, but nay increase to SCA levels
Saturday afternoon and evening. For the waters south of Point
Conception, winds and seas are expected to remain below SCA levels
through Mon.
&&
.BEACHES...05/900 AM.
A fairly significant long period south swell will move into the
coastal waters later today and tonight, then persist through the
weekend. There is high confidence of strong rip currents and
elevated surf, especially on south facing beaches. Issued a Beach
Hazards Statement for Fri morning through Sun. There is a chance
that surf could reach High Surf Advisory levels on south facing
beaches late Fri through early Sun.
&&
.FIRE WEATHER...05/900 AM.
Offshore flow will peak Friday and Saturday, resulting in warm
(Highs generally 90 to 100 degrees) and very dry (minimum humidity
6 to 12 percent) conditions everywhere. Winds will peak on Friday
with gusts in the 25 to 40 mph range from the mountains and down
to the coast...focused over Los Angeles and Ventura Counties.
Widespread elevated fire weather danger will exist over all 4
counties through Saturday. A Red Flag Warning is in effect for the
most critical and longest duration areas which include the Los
Angeles and Ventura County Mountains and the Santa Clarita Valley.
Currently this warning is only for Friday, but it may need to be
extended through Saturday. Other wind prone areas will see brief
Red Flag conditions, but likely not for the 6+ hour durations
needed for a Warning. Please advise the public to be extremely
cautious with potential fire starting sources.
Another offshore event is expected for Monday and Tuesday, but
there is a lot of uncertainty as to the strength of it. As it
stands, there is a potential for a moderate-to-strong Santa Ana
with widespread Red Flag conditions.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement in effect from late tonight through
Sunday evening for zones 34-35-40-41-87. (See LAXCFWLOX).
Red Flag Warning in effect from 6 AM to 8 PM PDT Friday for
zones 253-254-288. (See LAXRFWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Friday for
zones 670-673-676. (See LAXMWWLOX).
&&
.HAZARD POTENTIAL OUTLOOK...(SAT-WED)
Hot and dry weather is expected across the region Saturday. There
will be elevated fire danger during this time. Strong rip
currents are likely and high surf is possible at south and
southwest facing beaches through Sunday. Gusty Santa Ana winds are
possible next Monday and Tuesday.
&&
PUBLIC...MW/Thompson
AVIATION...DB
MARINE...Sweet
BEACHES...Sweet
FIRE...Kittell
SYNOPSIS...STu
weather.gov/losangelesThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 5, 3:14 AM PDT | Small Craft Advisory | LOX | 6 hr | |
| Oct 5, 5:26 AM PDT | Beach Hazards Statement | LOX | Los Angeles | 4 days |
| Oct 5, 8:57 AM PDT | Small Craft Advisory | LOX | 18 hr |
Nearby
Red Flag Warnings in California, 2017Every red flag warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.