Alert archive / California / Red Flag Warnings in 2018

Red Flag Warning 3, NWS San Diego, CA

October 13, 20184 counties in California

NWS San Diego, CA issued this red flag warning at Oct 13, 2018, 1:44 PM PDT for 4 counties in California. It took effect at Oct 15, 2018, 3:00 AM PDT. It was in force for 41 hr. 18 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Oct 13, 2018, 1:44 PM PDT (20:44 UTC)
In effect from
Oct 15, 2018, 3:00 AM PDT
Expired
Oct 16, 2018, 8:00 PM PDT
In force
41 hr
Issued by
NWS San Diego, CA

Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA

The radar

The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 20:46 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.

What was reported inside it

TimeReportWhereRemark
Oct 15, 7:00 AM PDTNON-TSTM WND GST 659 Sw Corona, CAMESONET STATION SE097, 8 SW CORONA.
Oct 15, 7:22 AM PDTNON-TSTM WND GST 555 E San Clemente, CAMESONET STATION TEOC1, SAN CLEMENTE (5 E).
Oct 15, 7:30 AM PDTNON-TSTM WND GST 606 Ne Mission Viejo, CAMESONET STATION SE080, 5 ENE MISSION VIEJO.
Oct 15, 7:40 AM PDTNON-TSTM WND GST 585 Ne Tustin, CAMESONET STATION SE081, 4 ENE TUSTIN.
Oct 15, 7:51 AM PDTNON-TSTM WND GST 758 Ne Tustin, CAMESONET STATION FRCC1, FREMONT CANYON.
Oct 15, 8:10 AM PDTNON-TSTM WND GST 606 Ne Mission Viejo, CAMESONET STATION SE080, 5 ENE MISSION VIEJO.
Oct 15, 8:17 AM PDTNON-TSTM WND DMG3 E Yorba Linda, CALARGE TREE DOWN ON ROADWAY ON YORBA RANCH RD.
Oct 15, 9:15 AM PDTNON-TSTM WND DMGTustin, CA*** 1 FATAL *** 1 WOMAN KILLED WHEN A LARGE TREE FELL ON HER CAR. HTTPS://ABC7.COM/TUSTIN-TREE-FALLS-ON-CAR-KILLS-WOMAN-INSIDE/4489247/.
Oct 15, 9:22 AM PDTNON-TSTM WND GST 595 E San Clemente, CAMESONET STATION TEOC1, SAN CLEMENTE (5 E).
Oct 15, 9:51 AM PDTNON-TSTM WND GST 828 Ne Tustin, CAMESONET STATION FRCC1, FREMONT CANYON.
Oct 15, 10:00 AM PDTNON-TSTM WND GST 602 E Ontario, CAASOS STATION ONT, ONTARIO AIRPORT.
Oct 15, 10:01 AM PDTNON-TSTM WND GST 561 Sw Crestline, CAMESONET STATION E3127, CRESTLINE.
Oct 15, 10:16 AM PDTNON-TSTM WND DMG1 Sse Lake Forest, CATREE FELL ON A TRACTOR TRAILER RIG NEAR I-5 AND EL TORO ROAD.
Oct 15, 11:30 AM PDTNON-TSTM WND GST 685 Wnw Palomar Mountain, CAMESONET STATION HF001, 8 NNE VALLEY CENTER.
Oct 15, 12:10 PM PDTNON-TSTM WND DMG2 Ne Tustin, CATWO TREES DOWN AT 11561 ARROYO AVE.
Oct 15, 12:12 PM PDTNON-TSTM WND DMG3 Wsw Fontana, CATREE DOWN NEAR BEECH AVENUE ELEMENTARY.
Oct 15, 12:21 PM PDTNON-TSTM WND DMG3 Nne Tustin, CAPOWER POLE DOWNED.
Oct 15, 1:40 PM PDTNON-TSTM WND DMG2 Sw Running Springs, CATREE DOWN ON HIGHWAY 330 BLOCKING THE DOWNBOUND LANE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 8.7 hours before the alert went out and 124 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.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2018-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2018-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
658 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

010 
WWUS86 KSGX 132044
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
144 PM PDT Sat Oct 13 2018

...Strong Santa Ana Winds Sunday Night Through Tuesday Morning...

CAZ248-250-255>258-552-554-140500-
/O.UPG.KSGX.FW.A.0003.181015T1000Z-181017T0300Z/
/O.NEW.KSGX.FW.W.0003.181015T1000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
144 PM PDT Sat Oct 13 2018

...RED FLAG WARNING IN EFFECT FROM 3 AM MONDAY TO 8 PM PDT
TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS,
INLAND VALLEYS AND ORANGE COUNTY...

The National Weather Service in San Diego has issued a a Red Flag
Warning...which is in effect from 3 AM Monday to 8 PM PDT
Tuesday. The Fire Weather Watch is no longer in effect. 

* LOCATION...Mountains, especially the foothills below 6,000 
  feet, the valleys, and all of Orange County.

* WIND...Northeast to east, 25 to 35 mph with gusts to 50 mph.
  Isolated gusts of 60 to 70 mph could occur in wind-prone
  locations Sunday night into Monday morning. 

* HUMIDITY...Decreasing rapidly late Monday morning, becoming 5 
  to 10 percent away from the coast. Poor recoveries Monday night.

* TIMING...Sunday night through Tuesday evening. The strongest
  winds are likely Sunday night into Monday morning and the 
  lowest humidity Monday afternoon.

* OUTLOOK...Gradually decreasing winds Tuesday night and 
  Wednesday.

* IMPACTS...Wetting rains will mitigate the Fire Weather threat
  early Monday morning. But the fuels will dry quickly and if fire
  ignition occurs, conditions are favorable for extreme fire
  behavior which would threaten life and property. Please avoid
  outdoor burning. In addition, the strong winds will make travel
  difficult for high-profile vehicles.

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.

&&

$$
10 follow-up statements
112 
WWUS86 KSGX 140447
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
947 PM PDT Sat Oct 13 2018

...Strong Santa Ana Winds Sunday Night Through Tuesday Morning...

CAZ248-250-255>258-552-554-141300-
/O.CON.KSGX.FW.W.0003.181015T1000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
947 PM PDT Sat Oct 13 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM MONDAY TO 8 PM
PDT TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS,
INLAND VALLEYS AND ORANGE COUNTY...

* LOCATION...Mountains, especially the foothills below 6,000 
  feet, the valleys, and all of Orange County. 

* WIND...Northeast to east, 20 to 40 mph with gusts to 60 mph.
  Isolated gusts to 75 mph possible in wind-prone locations Sunday
  night and Monday morning.

* HUMIDITY...Decreasing rapidly late Monday morning, becoming 5 
  to 10 percent away from the coast. Poor recoveries Monday 
  night.

* TIMING...Sunday night through Tuesday evening. The strongest
  winds are likely Sunday night and Monday morning and the lowest
  humidity Monday afternoon.

* OUTLOOK...Gradually decreasing winds Tuesday night and 
  Wednesday.

* IMPACTS...Wetting rains will mitigate the Fire Weather threat 
  early Monday morning. But the fuels will dry quickly and if fire
  ignition occurs conditions will be favorable for extreme fire 
  behavior which would threaten life and property. Please avoid 
  outdoor burning. In addition, the strong winds will make travel 
  difficult for high-profile vehicles.

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.

&&

$$

jmb

weather.gov
592 
WWUS86 KSGX 141040
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
340 AM PDT Sun Oct 14 2018

...RED FLAG WARNING LATE TONIGHT THROUGH TUESDAY EVENING FOR 
GUSTY OFFSHORE WINDS AND LOW RELATIVE HUMIDITY...

CAZ248-250-255>258-552-554-142100-
/O.CON.KSGX.FW.W.0003.181015T1000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
340 AM PDT Sun Oct 14 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM MONDAY TO 8 PM
PDT TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE
MOUNTAINS, INLAND VALLEYS AND ORANGE COUNTY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WIND...Northeast to east, 20 to 40 mph with gusts to 60 mph.
  Isolated gusts to 70 mph in wind-prone locations Monday. Strong
  winds will continue through Tuesday. 

* HUMIDITY...Decreasing rapidly Monday morning, becoming 5 to 10
  percent. Poor recoveries Monday night. Very low humidity again
  Tuesday.

* OUTLOOK...Gradually decreasing winds Tuesday night and 
  Wednesday.

* IMPACTS...Fuels will dry quickly Monday with the onset of the
  Santa Ana winds with increasing fire threat Monday night and
  Tuesday. 

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.

&&

$$

Moede
945 
WWUS86 KSGX 142050
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
150 PM PDT Sun Oct 14 2018

...RED FLAG WARNING LATE TONIGHT THROUGH TUESDAY EVENING FOR
GUSTY OFFSHORE WINDS AND LOW RELATIVE HUMIDITY...

CAZ248-250-255>258-552-554-150500-
/O.CON.KSGX.FW.W.0003.181015T1000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
150 PM PDT Sun Oct 14 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM MONDAY TO 8 PM
PDT TUESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE
MOUNTAINS AND INLAND VALLEYS PLUS ALL OF ORANGE COUNTY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WIND...Northeast to east, 20 to 40 mph with gusts to 60 mph.
  Isolated gusts to 75 mph in wind-prone locations Monday. Winds
  will be slightly weaker Tuesday.

* HUMIDITY...Decreasing rapidly Monday morning, becoming 5 to 
  10 percent. Poor recoveries Monday night. Very low humidity 
  again Tuesday.

* OUTLOOK...Gradually decreasing winds Tuesday night and 
  Wednesday.

* IMPACTS...Fuels will dry quickly Monday with the onset of the 
  Santa Ana winds with increasing fire threat Monday night and 
  Tuesday.

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.

&&

$$

Maxwell
091 
WWUS86 KSGX 150218
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
718 PM PDT Sun Oct 14 2018

CAZ248-250-255>258-552-554-151300-
/O.CON.KSGX.FW.W.0003.181015T1000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
718 PM PDT Sun Oct 14 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM MONDAY TO 8 PM
PDT TUESDAY FOR STRONG SANTA ANA WINDS AND VERY LOW HUMIDITY FOR 
THE MOUNTAINS AND INLAND VALLEYS PLUS ALL OF ORANGE COUNTY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WIND...Northeast to east, 20 to 40 mph with gusts to 60 mph.
  Highest gusts to 80 mph in the most wind-prone canyons and 
  foothills Monday. Winds will be slightly weaker Tuesday.

* HUMIDITY...Decreasing rapidly Monday morning, becoming 5 to 
  10 percent. Poor recoveries Monday night. Very low humidity 
  again Tuesday.

* OUTLOOK...Gradually decreasing winds Tuesday night and 
  Wednesday.

* IMPACTS...Fuels will dry quickly Monday with the onset of the
  Santa Ana winds with increasing fire threat Monday night and
  Tuesday. Outdoor burning should be avoided.

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.

&&

$$

jmb
940 
WWUS86 KSGX 151152
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
452 AM PDT Mon Oct 15 2018

...RED FLAG WARNING THROUGH TUESDAY EVENING FOR THE MOUNTAINS... 
VALLEYS...AND ORANGE COUNTY FOR STRONG GUSTY WINDS AND LOW 
HUMIDITY...

CAZ248-250-255>258-552-554-152230-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
452 AM PDT Mon Oct 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT TUESDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WINDS FOR ORANGE...SAN BERNARDINO AND RIVERSIDE COUNTIES...
  Widespread northeast winds of 30 to 40 mph with gusts to 60 
  mph, and with isolated gusts to 80 mph below passes and canyons 
  and near the coastal slopes of the Santa Ana Mountains. The 
  winds will not be as strong for tonight and Tuesday and not 
  quite as widespread with winds of 20 to 30 mph with gusts to 45 
  mph.

* WINDS FOR SAN DIEGO COUNTY...Areas of northeast winds developing
  and strengthening this morning and continuing into Tuesday with
  strongest winds from the mountain ridge tops into the inland
  valleys with winds of 20 to 30 mph with gusts to 45 mph.
  Isolated gusts to 55 mph are possible.

* HUMIDITY...Decreasing rapidly this morning, falling to 5 to 10
  percent with poor recovery for tonight. There may be a slight
  recovery on Tuesday with lowest humidity around 10 percent.

* OUTLOOK...Weaker and less widespread winds for Wednesday and
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will dry quickly this morning with the onset of
  the winds with increasing fire threat for late today into
  Tuesday. Outdoor burning should be avoided.

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.

&&

$$

17
401 
WWUS86 KSGX 151602
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
902 AM PDT Mon Oct 15 2018

...RED FLAG WARNING THROUGH TUESDAY EVENING FOR THE MOUNTAINS...
VALLEYS...AND ORANGE COUNTY FOR STRONG GUSTY WINDS AND LOW
HUMIDITY...

CAZ248-255>257-552-554-160015-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-Orange County Coastal Areas-Orange County Inland Areas-
902 AM PDT Mon Oct 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT TUESDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WINDS...Widespread northeast winds of 30 to 40 mph with gusts 
  to 60 mph, and with isolated gusts to 80 mph below passes and 
  canyons and near the coastal slopes of the Santa Ana Mountains. 
  The winds will not be as strong for tonight and Tuesday and not 
  quite as widespread with winds of 20 to 30 mph with gusts to 45 
  mph.

* HUMIDITY...5 to 10 percent with poor recovery for tonight. 
  There may be a slight recovery on Tuesday with lowest humidity 
  around 10 percent.

* OUTLOOK...Weaker and less widespread winds for Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will dry quickly this morning with the onset 
  ofthe winds with increasing fire threat for late today into 
  Tuesday. Outdoor burning should be avoided.

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.

&&

$$

CAZ250-258-160015-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
902 AM PDT Mon Oct 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT TUESDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet and the
  valleys. 

* WINDS...Areas of northeast winds developing and strengthening 
  this morning and continuing into Tuesday with strongest winds 
  from the mountain ridge tops into the inland valleys with winds 
  of 20 to 30 mph with gusts to 45 mph. Isolated gusts to 55 mph 
  are possible. 

* HUMIDITY...Decreasing rapidly this morning, falling to 5 to 
  10 percent with poor recovery for tonight. There may be a 
  slight recovery on Tuesday with lowest humidity around 10 
  percent.

* OUTLOOK...Weaker and less widespread winds for Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will dry quickly this morning with the onset 
  ofthe winds with increasing fire threat for late today into 
  Tuesday. Outdoor burning should be avoided.

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.

&&

$$
855 
WWUS86 KSGX 152033
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
133 PM PDT Mon Oct 15 2018

...RED FLAG WARNING THROUGH TUESDAY EVENING FOR THE MOUNTAINS...
VALLEYS...AND ORANGE COUNTY FOR STRONG GUSTY WINDS AND LOW
HUMIDITY...

CAZ248-255>257-552-554-160515-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-Orange County Coastal Areas-Orange County Inland Areas-
133 PM PDT Mon Oct 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT TUESDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet, the 
  valleys, and all of Orange County. 

* WINDS...Widespread northeast winds of 25 to 40 mph with gusts to
  65 mph early this afternoon. The winds will not be as strong
  late this afternoon through Tuesday and not quite as widespread
  with winds of 20 to 30 mph with gusts to 45 mph.

* HUMIDITY...5 to 10 percent this afternoon with poor recovery 
  tonight. There may be a slight recovery on Tuesday with lowest 
  humidity around 10 percent.

* OUTLOOK...Weaker and less widespread winds Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will continue to dry this afternoon through
  Tuesday, increasing the fire threat. Outdoor burning should be 
  avoided.

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.

&&

$$

CAZ250-258-160515-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
133 PM PDT Mon Oct 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT TUESDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet and the 
  valleys. 

* WINDS...Areas of northeast winds continuing through Tuesday with
  strongest winds from the mountain ridge tops into the inland
  valleys with winds of 15 to 30 mph with gusts to 45 mph. 
  Isolated gusts to 55 mph are possible.

* HUMIDITY...5 to 10 percent this afternoon with poor recovery 
  tonight. There may be a slight recovery on Tuesday with lowest 
  humidity around 10 percent.

* OUTLOOK...Weaker and less widespread winds Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will continue to dry this afternoon through
  Tuesday, increasing the fire threat. Outdoor burning should be
  avoided.

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.

&&

$$

Maxwell
196 
WWUS86 KSGX 160931
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
231 AM PDT Tue Oct 16 2018

...RED FLAG WARNING THROUGH THIS EVENING FOR THE MOUNTAINS... 
VALLEYS...AND ORANGE COUNTY FOR STRONG GUSTY WINDS AND LOW 
HUMIDITY...

CAZ248-250-255>258-552-554-162230-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
231 AM PDT Tue Oct 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet, the
  valleys, and most of Orange County. 

* WINDS...Areas of northeast winds 20 to 30 mph this morning with
  gusts to 45 mph...diminishing during the afternoon. Isolated
  gusts to 55 mph are possible in the morning.

* HUMIDITY...Humidity will fall to around 10 percent from mid 
  morning through the afternoon.

* OUTLOOK...Weaker and less widespread winds Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will continue to dry today, increasing the fire
  threat. Outdoor burning should be avoided.

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.

&&

$$

17
558 
WWUS86 KSGX 162008
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
108 PM PDT Tue Oct 16 2018

...RED FLAG WARNING THROUGH THIS EVENING FOR THE MOUNTAINS...
VALLEYS...AND ORANGE COUNTY FOR STRONG GUSTY WINDS AND LOW
HUMIDITY...

CAZ248-250-255>258-552-554-170300-
/O.CON.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
108 PM PDT Tue Oct 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITY...

* LOCATION...Mountains and foothills below 6,000 feet, the inland
  valleys, and most of Orange County. 

* WINDS...Areas of northeast winds 20 to 30 mph with gusts 45-50
  mph...diminishing this afternoon. Isolated gusts to 55 mph are
  possible in the early afternoon.

* HUMIDITY...Around 10 percent through this afternoon.

* OUTLOOK...Weaker and less widespread winds Wednesday and 
  Thursday with a gradual recovery in humidity.

* IMPACTS...Fuels will continue to dry today, increasing the 
  fire threat. Outdoor burning should be avoided. 

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.

&&

$$
650 
WWUS86 KSGX 170315
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
815 PM PDT Tue Oct 16 2018


CAZ248-250-255>258-552-554-170415-
/O.EXP.KSGX.FW.W.0003.000000T0000Z-181017T0300Z/
San Bernardino and Riverside County Valleys - The Inland Empire-
San Diego County Inland Valleys-San Bernardino County Mountains-
Including The Mountain Top And Front Country Ranger Districts Of
The San Bernardino National Forest-Riverside County Mountains-
Including The San Jacinto Ranger District Of The San Bernardino
National Forest-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland National
Forest-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-Orange County Coastal Areas-
Orange County Inland Areas-
815 PM PDT Tue Oct 16 2018

...RED FLAG WARNING HAS EXPIRED FOR STRONG GUSTY WINDS AND LOW
HUMIDITY...

The winds have decreased and humidities have increased this
afternoon. However, this dry Santa Ana pattern will remain in 
place through Friday, with warm, dry weather and gusty east winds 
in the mountains and foothills.

$$

Moede

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 San Diego, CA wrote its last area forecast discussion before this red flag warning went out at Oct 13, 1:44 PM PDT, 0 minutes earlier.

Area forecast discussion, Oct 13, 1:44 PM PDT, 0 minutes before
Area Forecast Discussion
National Weather Service San Diego CA
144 PM PDT Sat Oct 13 2018

.SYNOPSIS...
Cool and cloudy today with a chance for more showers and a few
thunderstorms. Dry and warmer with more sunshine on Sunday. Very
dry with strong offshore winds for Monday through Tuesday. Still
warm and dry for Wednesday through Friday but winds will be
weaker.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

From previous discussion...
The cold low currently over SoCal will slowly fill and become an
open wave as it moves inland this afternoon/evening. It will
still have enough instability and moisture to trigger scattered
showers through the afternoon, but that will diminish this
evening as the moisture decreases and the airmass stabilizes. The
potential still exists for the odd tstm, but the probability of
occurrence is very small.

The band of light rain with embedded showers persists over San
Bernardino County, western Riverside County and Orange County, but
is weakening steadily. A few light showers continue over San
Diego County, from near the coast to the Borrego Desert. In those
areas where rain is falling, it's accumulating at a rate of
approximately 0.01 to 0.10 inch per hour. Additional rainfall
could range from a few hundredths to nearly three tenths of an
inch in some locations. As the low pressure system moves
eastward, the rain and showers will continue to taper off and will
likely end by late evening.

Sunday will be dry and warmer with weak offshore flow, followed
by a period of much stronger offshore flow Monday and Tuesday as a
deep trough over Utah moves southwest into AZ and a sfc high
moves into the Great Basin. The wetting rains will mitigate the
fire weather concerns somewhat, at least at the beginning of this
Santa Ana event. But strong, dry Santa Ana winds will surface in
the mountains, foothills, inland valleys and Orange County, and
will dry the fuels fairly quickly Monday. Winds in these areas
will range from 20-40 mph with gusts in the wind prone areas of 60
mph or more. The winds remain fairly strong Tuesday with very low
humidities.

Warm and dry days with cool clear nights will continue for
Wednesday through Friday, with weaker offshore winds.

&&

.AVIATION...
132000Z.... A few light SHRA are persisting in Riverside and Orange
counties at this hour. These showers are expected to taper off
around 21-22Z. SCT-BKN clouds with bases 2500-4000 and tops to 10000
ft will persist at coastal and valley TAF sites through this evening
with coastal mountain slopes obscured. MOD SHRA and a thunderstorm
or two could develop over the mountains through this evening,
tapering off around 01-02Z. Brief, heavy downpours will lower VIS to
1-3 SM at times, with storm bases around 4000 ft MSL and tops to
25000 ft MSL. CIGS may briefly lower to around 1500-2500 ft MSL in
heavier showers. SCT-BKN clouds with bases around 4000 ft MSL
continuing into Sunday with coastal mountain slopes remaining
obscured.

&&

.MARINE...
A few light showers and a thunderstorm or two are possible through
this afternoon. Thunderstorms may produce brief heavy rain, gusty
winds, and cloud to water lightning. A Marine Weather Statement
remains in effect through this afternoon.

&&

.BEACHES...
A long period south-southwest swell of 2-3 ft/17-19 sec from 215
degrees will build today continuing elevated surf and strong rip
currents through the weekend. A Beach Hazards Statement remains in
effect for Orange and San Diego County Beaches through Sunday
evening.

There is also a slight chance of thunderstorms at the beaches
through this afternoon.

&&

.FIRE WEATHER...
Wetting rains last night and today will alleviate the fire
weather concerns, albeit briefly, at the beginning of the Santa
Ana event which begins early Monday morning. Isolated to scattered
showers will end tonight. On Sunday the fuels begin to dry out,
but the really strong offshore winds and dry air won't arrive
until Monday. That's when critical fire weather conditions are
most likely.

Northeast to east winds of 20 to 40 mph with isolated gusts over
60 mph are expected in the foothills and wind prone areas. The
strong winds will likely reach the Orange County coast. Humidity
will fall into the single digits and teens late Monday morning,
with poor recovery Monday night. Winds will be strongest on
Monday, decreasing a little on Tuesday, but conditions will remain
critical. Tuesday night humidity recovery will be better and
winds lighter.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Red Flag Warning from 3 AM Monday to 8 PM PDT Tuesday for Orange
     County Coastal Areas-Orange County Inland Areas-Riverside
     County Mountains-Including The San Jacinto Ranger District
     Of The San Bernardino National Forest-San Bernardino County
     Mountains-Including The Mountain Top And Front Country
     Ranger Districts Of The San Bernardino National Forest-San
     Bernardino and Riverside County Valleys  -The Inland Empire-
     San Diego County Inland Valleys-San Diego County Mountains-
     Including The Palomar And Descanso Ranger Districts of the
     Cleveland National Forest-Santa Ana Mountains-Including The
     Trabuco Ranger District of the Cleveland National Forest.

     Beach Hazards Statement through Sunday evening for Orange County
     Coastal Areas-San Diego County Coastal Areas.

PZ...NONE.

&&

PUBLIC/FIRE WEATHER...PG
AVIATION/MARINE/BEACHES...Connolly/JJT

In the hours before

Local storm report, Oct 13, 8:21 AM PDT, 5 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN DIEGO CA
821 AM PDT SAT OCT 13 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 AM     HEAVY RAIN       3 S PALM DESERT         33.70N 116.38W
10/13/2018  M0.72 INCH       RIVERSIDE          CA   PUBLIC

            12-HOUR RAINFALL TOTAL.

&&

JJT

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 12, 6:08 PM PDTSpecial Marine WarningSGX52 min
Oct 13, 12:17 AM PDTFlash Flood WarningSGXRiverside, San Bernardino3 hr
Oct 13, 3:22 AM PDTFlash Flood WarningSGXRiverside51 min

Nearby

Red Flag Warnings in California, 2018Every red flag warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.