Alert archive / California / Red Flag Warnings in 2019

Red Flag Warning 1, NWS San Diego, CA

October 8, 20194 counties in California

NWS San Diego, CA issued this red flag warning at Oct 8, 2019, 1:42 PM PDT for 4 counties in California. It took effect at Oct 10, 2019, 3:00 AM PDT. It was in force for 39 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 8, 2019, 1:42 PM PDT (20:42 UTC)
In effect from
Oct 10, 2019, 3:00 AM PDT
Expired
Oct 11, 2019, 6:00 PM PDT
In force
39 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 20:42 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 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 2019-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2019-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
2673 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

279 
WWUS86 KSGX 082042
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
142 PM PDT Tue Oct 8 2019

CAZ248-255>257-265-554-090500-
/O.UPG.KSGX.FW.A.0001.191010T1000Z-191012T0300Z/
/O.NEW.KSGX.FW.W.0001.191010T1000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
142 PM PDT Tue Oct 8 2019

...RED FLAG WARNING IN EFFECT FROM 3 AM THURSDAY TO 6 PM PDT
FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

The National Weather Service in San Diego has issued a Red Flag
Warning...which is in effect from 3 AM Thursday to 6 PM PDT
Friday. The Fire Weather Watch is no longer in effect. 

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph.
  Isolated gusts to 70 mph, mainly below the Cajon and Banning
  Passes, along and near the coastal slopes of the Santa Ana
  Mountains. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the San Bernardino mountains and
  valleys around midnight Wednesday night, the Santa Ana Mountains
  just before sunrise Thursday, with the winds becoming more
  widespread Thursday afternoon and continuing through Friday
  afternoon.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday, but
  with with weaker and less widespread winds with gusts mostly 25
  mph or less near the coastal slopes of the mountains on Saturday
  morning.

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.

&&

$$

CAZ261-552-090500-
/O.UPG.KSGX.FW.A.0001.191010T1000Z-191012T0300Z/
/O.NEW.KSGX.FW.W.0001.191010T1000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
142 PM PDT Tue Oct 8 2019

...RED FLAG WARNING IN EFFECT FROM 3 AM THURSDAY TO 8 AM PDT
FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

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

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph.
  Isolated gusts to 60 mph near Irvine and gusts up to 70 mph near
  Desert Hot Springs.

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the Coachella Valley late
  Wednesday night, then over coastal Orange County Thursday
  morning. Winds will increase through Thursday morning, weaken
  slightly late Thursday, then increase again Thursday night. 

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in the
  Coachella Valley.

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.

&&

$$

CAZ250-258-090500-
/O.UPG.KSGX.FW.A.0001.191010T1000Z-191012T0300Z/
/O.NEW.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
142 PM PDT Tue Oct 8 2019

...RED FLAG WARNING IN EFFECT FROM NOON THURSDAY TO 6 PM PDT
FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

The National Weather Service in San Diego has issued a Red Flag
Warning...which is in effect from noon Thursday to 6 PM PDT
Friday. The Fire Weather Watch is no longer in effect. 

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph.
  Isolated gusts to 60 mph, along and near the coastal mountain
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop Thursday afternoon and continue
  through Friday afternoon, with strongest winds Thursday night
  into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday, but
  with with weaker and less widespread winds with gusts mostly 25
  mph or less near the coastal slopes of the mountains on Saturday
  morning.

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.

&&

$$

JJT
10 follow-up statements
390 
WWUS86 KSGX 090449
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
949 PM PDT Tue Oct 8 2019

CAZ248-255>257-265-554-091300-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
949 PM PDT Tue Oct 8 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 70 mph, mainly below the Cajon and Banning 
  Passes, along and near the coastal slopes of the Santa Ana 
  Mountains. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the San Bernardino mountains 
  andvalleys around midnight Wednesday night, the Santa Ana 
  Mountains just before sunrise Thursday, with the winds 
  becoming more widespread Thursday afternoon and continuing 
  through Friday afternoon. 

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday, but 
  with with weaker and less widespread winds with gusts mostly 
  25 mph or less near the coastal slopes of the mountains on 
  Saturday morning. 

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.

&&

$$

CAZ261-552-091300-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
949 PM PDT Tue Oct 8 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 8 AM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph near Irvine and gusts up to 70 mph 
  near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the Coachella Valley late 
  Wednesday night, then over coastal Orange County Thursday 
  morning. Winds will increase through Thursday morning, weaken 
  slightly late Thursday, then increase again Thursday night.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley. 

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.

&&

$$

CAZ250-258-091300-
/O.CON.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
949 PM PDT Tue Oct 8 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop Thursday afternoon and continue 
  through Friday afternoon, with strongest winds Thursday night 
  into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday, but 
  with with weaker and less widespread winds with gusts mostly 
  25 mph or less near the coastal slopes of the mountains on 
  Saturday morning. 

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.

&&

$$

JJT/Maxwell
619 
WWUS86 KSGX 091056
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
356 AM PDT Wed Oct 9 2019

CAZ248-255>257-265-554-092100-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
356 AM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 35 mph with gusts to 50 mph. 
  Isolated gusts to 70 mph, mainly below the Cajon and Banning 
  Passes, along and near the coastal slopes of the Santa Ana 
  Mountains. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the San Bernardino mountains and
  around midnight, then surface into the valleys and the Santa Ana
  Mountains Thursday morning, with the winds becoming more 
  widespread Thursday afternoon and continuing through Friday 
  afternoon.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker winds.

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.

&&

$$

CAZ261-552-092100-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
356 AM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 8 AM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph near Irvine and gusts up to 70 mph 
  near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...Winds will develop in the Coachella Valley late 
  Wednesday night, then over coastal Orange County Thursday 
  morning. Winds will increase through Thursday morning, weaken 
  slightly late Thursday, then increase again Thursday night.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

CAZ250-258-092100-
/O.CON.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
356 AM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent with poor 
  overnight recovery.

* Timing...Winds will develop Thursday afternoon and continue 
  through Friday afternoon, with strongest winds Thursday night 
  into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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
751 
WWUS86 KSGX 092057
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
157 PM PDT Wed Oct 9 2019

CAZ248-255>257-265-554-100500-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
157 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 35 mph with gusts to 50 mph. 
  Isolated gusts to 70 mph, mainly below the Cajon and Banning 
  Passes, along and near the coastal slopes of the Santa Ana 
  Mountains. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the San Bernardino mountains
  around midnight, then surface into the valleys and the Santa Ana
  Mountains Thursday morning. The winds will become more
  widespread Thursday afternoon and continue through Friday 
  afternoon.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker winds.

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.

&&

$$

CAZ261-552-100500-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
157 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 8 AM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph near Irvine and gusts up to 70 mph 
  near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...Winds will develop in the Coachella Valley late
  tonight, then over coastal Orange County Thursday morning. Winds
  will increase through Thursday morning, weaken slightly Thursday
  evening, then increase again Thursday night.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

CAZ250-258-100500-
/O.CON.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
157 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent with poor 
  overnight recovery.

* Timing...Winds will develop Thursday afternoon and continue 
  through Friday afternoon, with strongest winds Thursday night 
  into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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
954 
WWUS86 KSGX 100458
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
958 PM PDT Wed Oct 9 2019

CAZ248-255>257-265-554-101300-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
958 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 35 mph with gusts to 50 mph. 
  Isolated gusts to 70 mph, mainly below the Cajon and Banning 
  Passes, along and near the coastal slopes of the Santa Ana 
  Mountains. 

* Humidity...Lowest daytime of 5 to 10 percent Thursday and 5 
  percent Friday, with poor overnight recovery.

* Timing...Winds will develop in the San Bernardino mountains 
  around midnight, then surface into the valleys and the Santa 
  Ana Mountains Thursday morning. The winds will become more 
  widespread Thursday afternoon and continue through Friday 
  afternoon.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker winds.

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.

&&

$$

CAZ261-552-101300-
/O.CON.KSGX.FW.W.0001.191010T1000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
958 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 AM THURSDAY TO 8 AM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph near Irvine and gusts up to 70 mph 
  near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...Winds will develop in the Coachella Valley late 
  tonight, then over coastal Orange County Thursday morning. 
  Winds will increase through Thursday morning, weaken slightly 
  Thursday evening, then increase again Thursday night. 

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

CAZ250-258-101300-
/O.CON.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
958 PM PDT Wed Oct 9 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON THURSDAY TO 6 PM
PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent with poor 
  overnight recovery.

* Timing...Winds will develop Thursday afternoon and continue 
  through Friday afternoon, with strongest winds Thursday night 
  into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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
924 
WWUS86 KSGX 101110
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
410 AM PDT Thu Oct 10 2019

CAZ248-255>257-265-554-102100-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-Orange County Inland Areas-
410 AM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 35 mph with gusts to 50 mph.
  Isolated gusts to 70 mph, mainly below the Cajon Pass, through the
  Santa Ana Mountains and on the coastal foothills.
 
* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...This morning through Friday.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker winds.

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.

&&

$$

CAZ261-552-102100-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
410 AM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 AM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph.
  Isolated gusts to 60 mph possible near Irvine with gusts up to 
  70 mph below the Morongo Pass near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...Today through Friday.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

CAZ250-258-102100-
/O.CON.KSGX.FW.W.0001.191010T1900Z-191012T0100Z/
San Diego County Inland Valleys-San Diego County Mountains-
Including The Palomar And Descanso Ranger Districts of the
Cleveland National Forest-
410 AM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM PDT
FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent with poor 
  overnight recovery.

* Timing...Winds will develop this afternoon and continue through
  Friday afternoon, with strongest winds Thursday night into 
  Friday morning.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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
161 
WWUS86 KSGX 102003
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
103 PM PDT Thu Oct 10 2019

CAZ248-250-255>258-265-554-110500-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-
Orange County Inland Areas-
103 PM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph, along and near the coastal mountain 
  slopes. 

* Humidity...Lowest daytime of 5 to 10 percent with poor 
  overnight recovery.

* Timing...Winds will develop through Friday afternoon, with 
  strongest winds Thursday night into Friday morning.

* Impacts...Any fires that develop will likely spread rapidly.
  Outdoor burning is not recommended. The strong winds could blow
  around unsecured objects and make driving high profile vehicles
  more difficult than typical. Areas of blowing sand and dust will
  be possible, which could lead to sudden visibility 
  restrictions.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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.

&&

$$

CAZ261-552-110500-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
103 PM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 AM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 20 to 30 mph with gusts to 50 mph. 
  Isolated gusts to 60 mph possible near Irvine with gusts up to 
  70 mph below the Morongo Pass near Desert Hot Springs. 

* Humidity...Lowest daytime of 5 to 10 percent, with poor 
  overnight recovery.

* Timing...Through Friday.

* Impacts...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended. The strong winds could blow
  around unsecured objects and make driving high profile vehicles
  more difficult than typical. Areas of blowing sand and dust will
  be possible, which could lead to sudden visibility 
  restrictions.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

CO/JJT
418 
WWUS86 KSGX 110402
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
902 PM PDT Thu Oct 10 2019


CAZ248-250-255>258-265-554-111300-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-
Orange County Inland Areas-
902 PM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...Northeast to east winds 20 to 35 mph with gusts to 60
  mph. Isolated gusts to 70 in the northern Santa Ana Mountains
  and below the San Gorgonio pass.

* Humidity...Lowest daytime of 3 to 6 percent on Friday with poor
  overnight recovery tonight.

* Timing...Winds strengthening slightly tonight and peaking early
  Friday morning, then weakening Friday afternoon.

* Impacts...Current fires and any new fires may spread rapidly and
  exhibit extreme fire behavior. Active burning through the night
  due to gusty winds and extremely dry conditions. Outdoor burning
  is not recommended. The strong winds could blow around unsecured
  objects and make driving high profile vehicles more difficult. 
  Areas of blowing sand and dust will be possible, which could 
  lead to sudden visibility restrictions.

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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.

&&

$$

CAZ261-552-111300-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
902 PM PDT Thu Oct 10 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 AM PDT FRIDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 15 to 25 mph with gusts to 40 mph.

* Humidity...Poor humidity recovery of 15 to 20 percent tonight.

* Timing...Through Friday morning.

* Impacts...Any fires that start may spread rapidly and exhibit 
  extreme fire behavior. Active burning through the night due to 
  gusty winds and extremely dry conditions. Outdoor burning is not
  recommended. The strong winds could blow around unsecured 
  objects and make driving high profile vehicles more difficult. 
  Areas of blowing sand and dust will be possible, which could 
  lead to sudden visibility restrictions.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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.

&&

$$

SS
248 
WWUS86 KSGX 111213
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
513 AM PDT Fri Oct 11 2019

CAZ248-250-255>258-265-554-112015-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-
Orange County Inland Areas-
513 AM PDT Fri Oct 11 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...Northeast to east winds 20 to 35 mph with gusts 50 to 60
  mph. Isolated gusts to 70 in the northern Santa Ana Mountains
  and below the Cajon Pass this morning. 

* Humidity...Lowest daytime of 3 to 6 percent with poor overnight
  recovery tonight. 

* Timing...strongest this morning. Weakening this afternoon.
  

* Impacts...Current fires and any new fires may spread rapidly
  and exhibit extreme fire behavior. Active burning through the 
  night due to gusty winds and extremely dry conditions. 
  Outdoor burning is not recommended. The strong winds could 
  blow around unsecured objects and make driving high profile 
  vehicles more difficult. Areas of blowing sand and dust will 
  be possible, which could lead to sudden visibility 
  restrictions. 

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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.

&&

$$

CAZ261-552-111500-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
513 AM PDT Fri Oct 11 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...East to northeast 15 to 25 mph with gusts to 40 mph.

* Humidity...Poor humidity recovery of 15 to 20 percent tonight.

* Timing...Through Friday morning.

* Impacts...Any fires that start may spread rapidly and exhibit 
  extreme fire behavior. Active burning through the night due 
  to gusty winds and extremely dry conditions. Outdoor burning 
  is not recommended. The strong winds could blow around 
  unsecured objects and make driving high profile vehicles more 
  difficult. Areas of blowing sand and dust will be possible, 
  which could lead to sudden visibility restrictions.

* Outlook...Very low humidity will continue into Saturday in 
  the Coachella Valley.

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
058 
WWUS86 KSGX 111452
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
752 AM PDT Fri Oct 11 2019


CAZ261-552-111600-
/O.EXP.KSGX.FW.W.0001.000000T0000Z-191011T1500Z/
Coachella Valley-
Including The Palm Springs South Coast Desert District-
Orange County Coastal Areas-
752 AM PDT Fri Oct 11 2019

...RED FLAG WARNING WILL EXPIRE AT 8 AM PDT THIS MORNING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY...

Winds have diminished below Red Flag criteria, however relative
humidity will likely remain low throughout the day.

$$

CAZ248-250-255>258-265-554-120100-
/O.CON.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-
Orange County Inland Areas-
752 AM PDT Fri Oct 11 2019

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...

* Wind...Northeast to east winds 20 to 35 mph with gusts 50 to 
  60 mph. Isolated gusts to 70 in the northern Santa Ana 
  Mountains and below the Cajon Pass this morning. 

* Humidity...Lowest daytime of 3 to 6 percent with poor 
  overnight recovery tonight. 

* Timing...Strongest this morning. Weakening this afternoon.

* Impacts...Current fires and any new fires may spread rapidly 
  and exhibit extreme fire behavior. Active burning through the 
  night due to gusty winds and extremely dry conditions. 
  Outdoor burning is not recommended. The strong winds could 
  blow around unsecured objects and make driving high profile 
  vehicles more difficult. Areas of blowing sand and dust will 
  be possible, which could lead to sudden visibility 
  restrictions. 

* Outlook...Very low relative humidity will continue into 
  Saturday, but with with weaker and less widespread winds near 
  the coastal slopes of the mountains on Saturday morning.

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.

&&

$$

Connolly/JJT
496 
WWUS86 KSGX 120103
RFWSGX

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Diego CA
603 PM PDT Fri Oct 11 2019

CAZ248-250-255>258-265-554-120215-
/O.EXP.KSGX.FW.W.0001.000000T0000Z-191012T0100Z/
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-San Gorgonio Pass Near Banning-
Orange County Inland Areas-
603 PM PDT Fri Oct 11 2019

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

Winds have dropped below Red Flag criteria and will continue to
weaken this evening. The Red Flag Warning was allowed to expire at
6 PM. Very dry conditions will continue into Saturday.

$$

SS

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 8, 9:52 AM PDT, 3 hours 50 minutes earlier.

Area forecast discussion, Oct 8, 9:52 AM PDT, 3 hours 50 minutes before
Area Forecast Discussion
National Weather Service San Diego CA
952 AM PDT Tue Oct 8 2019

.SYNOPSIS...
Onshore flow will strengthen into Wednesday evening spreading
cooling inland with gusty southwest to west winds in the
mountains and deserts. The marine layer will deepen through
Wednesday. Patchy low clouds and dense fog will be near the coast
this morning. Low clouds are expected to become more widespread
and spread into the western valleys for tonight into Wednesday
morning. Periods of strong and gusty Santa Ana winds will develop
late Wednesday night in the San Bernardino County mountains and
valleys, then spread southward into the San Diego County
mountains and valleys Thursday morning with the winds becoming
more widespread Thursday afternoon. Periods of strong and gusty
winds will continue into Friday with weaker and more localized
winds continuing into Saturday morning. Temperatures will cool
into Wednesday for coastal and valley areas and into Thursday for
the mountains and deserts followed by a warming trend into Sunday
and Monday.

&&

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

At 9 AM, water vapor satellite showed an upper-level ridge over
southern Baja, and an deep upper-level trough moving across the
Pacific NW. Visible satellite showed patchy dense fog clearing
over the land areas, but lingering over the coastal waters. The
trough will move into the Great Basin over the next day, helping
to strengthen onshore flow across southern CA. This will create a
deeper marine layer through Thursday, spreading low clouds and fog
further into the valleys each morning, and lower high temperatures
today to just above normal, and Wednesday to around 5-10 degrees
below normal. West to southwest winds will strengthen across
desert mountain slopes into adjacent deserts today and Wednesday,
with gusts of 35-45 mph, isolated to 50 mph possible by Wednesday.

Ensemble solutions are in good agreement with the overall pattern
this week, then begin to differ for early next week. The main
weather threat this week will be the gusty Santa Ana winds and
fire weather concerns. A 1041 mb surface high building over
central ID Thursday morning will create strong and gusty east to
northwest winds across the San Bernardino mountains and valleys
around midnight Wednesday night, the Santa Ana Mountains near
sunrise Thursday, and during the morning on Thursday in San Diego
County, with the winds becoming more widespread Thursday and
making it to the Orange county Coast by late Thursday morning. As
the surface high moves into Colorado Friday morning, winds will
strengthen in San Diego County compared to Thursday. Winds will be
20 to 30 mph with gusts to 50 mph through the period. Isolated
gusts to 60 mph, mainly below the Cajon and Banning Passes, along
and near the coastal slopes of the Santa Ana Mountains are
possible Thursday. The winds will push any low clouds offshore by
late Thursday morning through Saturday morning. Given the strength
of the offshore winds following an extended dry period, the winds
may generate areas of blowing gust in the Inland Empire Thursday
with the blowing dust spreading westward and off the coast on
Thursday afternoon.

A very dry airmass will move into the region from the north,
helping to lower relative humidity down to the single digits for
areas away from the beach, especially Friday morning. Cold air
will lower highs and lows 10-20 degrees below normal in the
deserts, however downsloping winds will keep areas along and west
of the mountains warmer than other areas. Areas of the high
deserts will see lows Friday morning in the mid to upper 30s.

Mostly zonal flow will develop aloft for the weekend into early
next week, which will help generate high temperatures mostly near
seasonal normals and redevelop the marine layer low clouds and
fog along the coast.

&&

.AVIATION...
081535Z...Coast/Valleys...Low clouds and fog with bases 300-600 ft
MSL along the immediate coast will slowly clear through mid morning.
Mostly clear and VFR conditions prevailing through early evening.
Low clouds and fog returning early after 02Z and moving locally 10-
15 miles inland overnight. Cloud bases around 700-1200 feet MSL with
reduced vis on higher coastal terrain.

Mountains/Deserts...VFR conditions today and tonight.

&&

.MARINE...
Areas of fog with some vis below 1SM slowly clearing this morning.
Fog may return at times tonight. Otherwise, no hazardous marine
conditions are expected through Saturday.

&&

.FIRE WEATHER...
Onshore flow will strengthen into Wednesday evening spreading
cooling and higher coastal humidity inland with gusty southwest to
west winds in the mountains and deserts during the afternoons and
evenings with the winds stronger and more widespread on Wednesday
with strongest gusts to around 50 mph.

Periods of strong and gusty Santa Ana winds will develop in the
San Bernardino mountains and valleys around midnight Wednesday
night, the Santa Ana Mountains near sunrise Thursday, and during
the morning on Thursday in San Diego County, with the winds
becoming more widespread Thursday afternoon.

The winds will continue for Thursday night into Friday with the
winds for Orange, San Bernardino, and Riverside counties not quite
as strong on Friday as on Thursday with decreasing coverage on
Friday afternoon. The winds in the San Diego County mountains and
inland valleys may be a little stronger on Friday than on Thursday
as the lower level flow becomes more easterly. Weaker and more
localized winds will continue into Saturday morning, mainly near
the coastal slopes of the mountains.

The air mass spreading into southwest California with the Santa
Ana winds will be much drier with humidities except near the
coast falling to 5 to 10 percent Thursday and around 5 percent
Friday.

Critical fire weather conditions are expected for much of
southwestern California for Thursday into Friday. Elevated
conditions will continue into Saturday with continued very low
humidity, but with weaker and more localized winds.

A gradual recovery in humidity for inland areas for Sunday and
Monday with winds mostly weak.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Fire Weather Watch from late Wednesday night through Friday
     evening for Coachella Valley-Including The Palm Springs
     South Coast Desert District-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-San Gorgonio Pass Near Banning-
     Santa Ana Mountains-Including The Trabuco Ranger District
     of the Cleveland National Forest.

PZ...NONE.
&&

PUBLIC...JJT
FIRE WEATHER...17
AVIATION/MARINE...APR

Nearby

Red Flag Warnings in California, 2019Every red flag warning in 2019

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.