Alert archive / California / Red Flag Warnings in 2017
Red Flag Warning 2, NWS Los Angeles, CA
NWS Los Angeles, CA issued this red flag warning at Jun 25, 2017, 8:37 PM PDT for Los Angeles County, California. It took effect at Jun 26, 2017, 9:00 AM PDT. It was in force for 12 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
- Jun 25, 2017, 8:37 PM PDT (03:37 UTC)
- In effect from
- Jun 26, 2017, 9:00 AM PDT
- Expired
- Jun 26, 2017, 9:00 PM PDT
- In force
- 12 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 03:42 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
San Diego, CA (KNKX), launched 00:00Z, 3.6 hours before the alert went out and 184 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
- 3359 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
380 WWUS86 KLOX 260337 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 837 PM PDT Sun Jun 25 2017 ...RED FLAG WARNING IN EFFECT FROM 9 AM TO 9 PM PDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA CLARITA AND ANTELOPE VALLEYS AS WELL AS THE LOS ANGELES COUNTY MOUNTAINS... .A hot and dry air mass will combine with gusty onshore winds on Monday and Monday evening to produce critical fire weather conditions across the Santa Clarita and Antelope Valleys as well as the Los Angeles County Mountains. CAZ254-288-261630- /O.NEW.KLOX.FW.W.0002.170626T1600Z-170627T0400Z/ Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 837 PM PDT Sun Jun 25 2017 ...RED FLAG WARNING IN EFFECT FROM 9 AM TO 9 PM PDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES COUNTY MOUNTAINS AND SANTA CLARITA VALLEY... THE NATIONAL WEATHER SERVICE IN LOS ANGELES/OXNARD HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES COUNTY MOUNTAINS AND THE SANTA CLARITA VALLEY. THIS WARNING IS IN EFFECT FROM 9 AM TO 9 PM PDT MONDAY. * Winds...Southwest winds will increase to 15 to 25 mph with gusts to 35 mph on Monday morning and remain gusty through Monday evening. Local southwest winds will increase to 20 to 30 mph with gusts to 45 mph over the interior foothills into the Antelope Valley. * Relative Humidity...Humidities will fall to generally between 6 to 13 percent on Monday and remain below critical humidity 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 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. && $$ CAZ259-261630- /O.NEW.KLOX.FW.W.0002.170626T1600Z-170627T0400Z/ Antelope Valley- 837 PM PDT Sun Jun 25 2017 ...RED FLAG WARNING IN EFFECT FROM 9 AM TO 9 PM PDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE ANTELOPE VALLEY... THE NATIONAL WEATHER SERVICE IN LOS ANGELES/OXNARD HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE ANTELOPE VALLEY. THIS WARNING IS IN EFFECT FROM 9 AM to 9 PM PDT MONDAY. * Winds...Southwest winds will increase to 15 to 30 mph with gusts to 40 mph on Monday morning and remain gusty through Monday evening. Winds may be locally stronger near the foothills of the Antelope Valley. * Relative Humidity...Humidities will fall to generally between 3 to 10 percent on Monday and remain below critical humidity through Monday evening. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Hall/CK
2 follow-up statements
154 WWUS86 KLOX 261627 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 927 AM PDT Mon Jun 26 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANTA CLARITA AND ANTELOPE VALLEYS AS WELL AS THE LOS ANGELES COUNTY MOUNTAINS... .A hot and dry air mass will combine with gusty west and southwest winds through this evening to produce critical fire weather conditions across the Santa Clarita and Antelope Valleys as well as the Los Angeles County Mountains. CAZ254-288-270030- /O.CON.KLOX.FW.W.0002.000000T0000Z-170627T0400Z/ Los Angeles County Mountains / Angeles National Forest- Santa Clarita Valley- 927 AM PDT Mon Jun 26 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE LOS ANGELES COUNTY MOUNTAINS AND SANTA CLARITA VALLEY... * Winds...Southwest winds will increase to 15 to 25 mph with gusts to 35 mph on Monday morning and remain gusty through Monday evening. Local southwest winds will increase to 20 to 30 mph with gusts to 45 mph over the interior foothills into the Antelope Valley. * Relative Humidity...Humidities will fall to generally between 6 to 13 percent on Monday and remain below critical humidity 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 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. && $$ CAZ259-270030- /O.CON.KLOX.FW.W.0002.000000T0000Z-170627T0400Z/ Antelope Valley- 927 AM PDT Mon Jun 26 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE ANTELOPE VALLEY... * Winds...Southwest winds will increase to 15 to 30 mph with gusts to 40 mph on Monday morning and remain gusty through Monday evening. Winds may be locally stronger near the foothills of the Antelope Valley. * Relative Humidity...Humidities will fall to generally between 3 to 10 percent on Monday and remain below critical humidity through Monday evening. * Impacts...If fire ignition occurs, conditions are favorable for extreme fire behavior which would threaten life and property. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
913 WWUS86 KLOX 270403 RFWLOX URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 903 PM PDT Mon Jun 26 2017 ...RED FLAG WARNING HAS EXPIRED FOR THE SANTA CLARITA VALLEY AS WELL AS THE LOS ANGELES COUNTY MOUNTAINS AND ANTELOPE VALLEY... CAZ254-259-288-270515- /O.EXP.KLOX.FW.W.0002.000000T0000Z-170627T0400Z/ Los Angeles County Mountains / Angeles National Forest- Antelope Valley-Santa Clarita Valley- 903 PM PDT Mon Jun 26 2017 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY... Gusty onshore winds will continue to diminish tonight allowing the Red Flag Warning to expire. However, very warm and dry conditions coupled with a return of gusty onshore winds in the afternoon hours will bring elevated fire danger to all interior sections on Tuesday. $$ Gomberg
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.