Alert archive / California / Red Flag Warnings in 2016

Red Flag Warning 7, NWS San Diego, CA

October 17, 20164 counties in California

NWS San Diego, CA issued this red flag warning at Oct 17, 2016, 1:49 PM PDT for 4 counties in California. It took effect at Oct 19, 2016, 2:00 AM PDT. It was in force for 42 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 17, 2016, 1:49 PM PDT (20:49 UTC)
In effect from
Oct 19, 2016, 2:00 AM PDT
Expired
Oct 20, 2016, 8:00 PM PDT
In force
42 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 20:49 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, 8.8 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 2016-10-17Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2016-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 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
633 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

928 
WWUS86 KSGX 172049
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
149 PM PDT MON OCT 17 2016

...RED FLAG WARNING IN EFFECT FROM LATE TUESDAY NIGHT THROUGH
THURSDAY EVENING FOR THE MOUNTAINS...VALLEYS AND INLAND ORANGE
COUNTY...

.MODERATE TO LOCALLY STRONG SANTA ANA WINDS WILL CREATE CRITICAL
FIRE GROWTH CONDITIONS WEDNESDAY AND THURSDAY. WETTING RAINS IN
THE SAN BERNARDINO FOOTHILLS AND THE SANTA ANA MOUNTAINS AND
FOOTHILLS HAVE BRIEFLY INCREASED THE FUEL MOISTURE CONTENT.
HOWEVER THE FUELS WILL DRY QUICKLY WITH THE ONSET OF THE SANTA ANA
WINDS TUESDAY NIGHT. THE STRONGEST WINDS ARE EXPECTED THROUGH AND
BELOW THE MOUNTAIN PASSES AND INTO PORTIONS OF THE INLAND
VALLEYS. THE WINDS WILL FIRST REACH THE CAJON PASS...THE INLAND
EMPIRE...THE SANTA ANA MOUNTAINS AND FOOTHILLS AND INLAND ORANGE
COUNTY LATE TUESDAY NIGHT INTO WEDNESDAY MORNING. CRITICAL FIRE
WEATHER CONDITIONS THEN LIKELY TO SPREAD INTO SAN DIEGO COUNTY
WEDNESDAY INTO THURSDAY. THE SANTA ANA WINDS WILL PROBABLY BE
WEAKER ON FRIDAY...BUT HOT AND DRY CONDITIONS WILL CONTINUE FOR
INLAND AREAS.

CAZ248-250-255>258-265-554-180500-
/O.UPG.KSGX.FW.A.0008.161019T0900Z-161021T0300Z/
/O.NEW.KSGX.FW.W.0007.161019T0900Z-161021T0300Z/
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-
149 PM PDT MON OCT 17 2016

...RED FLAG WARNING IN EFFECT FROM 2 AM WEDNESDAY TO 8 PM PDT
THURSDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE
MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 2 AM WEDNESDAY TO 8 PM PDT
THURSDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. 

* WIND...NORTHEAST TO EAST 15 TO 30 MPH WITH GUSTS 40 TO 50 MPH.

* HUMIDITY...FALLING BELOW 15 PERCENT EARLY WEDNESDAY AND MOSTLY 
  IN THE SINGLE DIGITS WEDNESDAY AND THURSDAY. VERY POOR 
  OVERNIGHT RECOVERIES. 

* TIMING...WINDS PICKING UP AND CONDITIONS DRYING OUT TUESDAY 
  NIGHT AND EARLY WEDNESDAY MORNING. MODERATE TO LOCALLY STRONG 
  OFFSHORE WINDS CONTINUING THROUGH THURSDAY.

* OUTLOOK...WEAKER WINDS THURSDAY NIGHT INTO FRIDAY. HOWEVER...
  IT WILL CONTINUE HOT AND DRY ON FRIDAY EVEN AS WINDS WEAKEN. 

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.
  OUTDOOR BURNING IS NOT RECOMMENDED.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

MOEDE
7 follow-up statements
698 
WWUS86 KSGX 180944
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
244 AM PDT TUE OCT 18 2016

...RED FLAG WARNING IN EFFECT FROM EARLY WEDNESDAY THROUGH
THURSDAY FOR THE MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.MODERATE TO LOCALLY STRONG SANTA ANA WINDS WILL CREATE CRITICAL
FIRE GROWTH CONDITIONS WEDNESDAY AND THURSDAY. WETTING RAINS IN
THE SAN BERNARDINO FOOTHILLS AND THE SANTA ANA MOUNTAINS AND
FOOTHILLS HAVE BRIEFLY INCREASED THE FUEL MOISTURE CONTENT.
HOWEVER THE FUELS WILL DRY QUICKLY WITH THE ONSET OF THE SANTA
ANA WINDS TONIGHT. THE STRONGEST WINDS ARE EXPECTED THROUGH AND
BELOW THE MOUNTAIN PASSES AND INTO PORTIONS OF THE INLAND VALLEYS.
THE WINDS WILL FIRST REACH THE CAJON PASS...THE INLAND
EMPIRE...THE SANTA ANA MOUNTAINS AND FOOTHILLS AND INLAND ORANGE
COUNTY LATE TONIGHT INTO WEDNESDAY MORNING. CRITICAL FIRE WEATHER
CONDITIONS WILL SPREAD INTO SAN DIEGO COUNTY WEDNESDAY INTO THURSDAY.
THE SANTA ANA WINDS WILL WEAKEN BY FRIDAY...BUT HOT AND DRY
CONDITIONS WILL CONTINUE.

CAZ248-250-255>258-265-554-182100-
/O.CON.KSGX.FW.W.0007.161019T0900Z-161021T0300Z/
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-
244 AM PDT TUE OCT 18 2016

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 AM WEDNESDAY TO 8 PM
PDT THURSDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE
MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 30 MPH WITH GUSTS 40 TO 50 MPH.

* HUMIDITY...FALLING BELOW 15 PERCENT EARLY WEDNESDAY AND MOSTLY
  IN THE SINGLE DIGITS WEDNESDAY AND THURSDAY. VERY POOR OVERNIGHT
  RECOVERIES...ESPECIALLY WHERE WINDS PERSIST.

* TIMING...WINDS PICKING UP AND CONDITIONS DRYING OUT TUESDAY 
  NIGHT AND EARLY WEDNESDAY MORNING. MODERATE TO LOCALLY STRONG 
  OFFSHORE WINDS CONTINUING THROUGH THURSDAY.

* OUTLOOK...WEAKER WINDS THURSDAY NIGHT INTO FRIDAY. HOWEVER... 
  IT WILL CONTINUE HOT AND DRY ON FRIDAY EVEN AS WINDS WEAKEN.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

MM
350 
WWUS86 KSGX 182152
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
252 PM PDT TUE OCT 18 2016

...RED FLAG WARNING IN EFFECT FROM EARLY WEDNESDAY THROUGH
THURSDAY FOR THE MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.MODERATE TO LOCALLY STRONG SANTA ANA WINDS WILL CREATE CRITICAL
FIRE GROWTH CONDITIONS WEDNESDAY AND THURSDAY. WETTING RAINS FROM
MONDAY IN THE SAN BERNARDINO FOOTHILLS AND THE SANTA ANA
MOUNTAINS AND FOOTHILLS HAVE BRIEFLY INCREASED THE FUEL MOISTURE
CONTENT. HOWEVER THE FUELS WILL DRY QUICKLY WITH THE ONSET OF THE
SANTA ANA WINDS LATE TONIGHT. THE STRONGEST WINDS ARE EXPECTED
THROUGH AND BELOW THE MOUNTAIN PASSES AND INTO PORTIONS OF THE
INLAND VALLEYS. THE WINDS WILL FIRST REACH THE CAJON PASS...THE
INLAND EMPIRE...THE SANTA ANA MOUNTAINS AND FOOTHILLS AND INLAND
ORANGE COUNTY LATE TONIGHT INTO WEDNESDAY MORNING. CRITICAL FIRE
WEATHER CONDITIONS WILL SPREAD INTO SAN DIEGO COUNTY BY MID-
MORNING WEDNESDAY. WINDS WILL WEAKEN SOMEWHAT WEDNESDAY EVENING
BUT INCREASE AGAIN VERY EARLY THURSDAY MORNING...BUT WITH LOWER
SPEEDS THURSDAY THAN ON WEDNESDAY. THE SANTA ANA WINDS WILL
WEAKEN BY FRIDAY...BUT HOT AND DRY CONDITIONS WILL CONTINUE.

CAZ248-250-255>258-265-554-191200-
/O.CON.KSGX.FW.W.0007.161019T0900Z-161021T0300Z/
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-
252 PM PDT TUE OCT 18 2016

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 AM WEDNESDAY TO 8 PM
PDT THURSDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE
MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 30 MPH WITH LOCAL GUSTS 40 TO 50
  MPH.

* HUMIDITY...FALLING BELOW 15 PERCENT EARLY WEDNESDAY AND 
  MOSTLY IN THE SINGLE DIGITS WEDNESDAY AND THURSDAY. VERY POOR 
  OVERNIGHT RECOVERIES...ESPECIALLY WHERE WINDS PERSIST. 

* TIMING...WINDS PICKING UP AND CONDITIONS DRYING OUT TUESDAY 
  NIGHT AND EARLY WEDNESDAY MORNING. MODERATE TO LOCALLY STRONG 
  OFFSHORE WINDS CONTINUING THROUGH THURSDAY.

* OUTLOOK...WEAKER WINDS THURSDAY NIGHT INTO FRIDAY. HOWEVER... 
  IT WILL CONTINUE HOT AND DRY ON FRIDAY EVEN AS WINDS WEAKEN.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

MAXWELL
248 
WWUS86 KSGX 191129
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
429 AM PDT WED OCT 19 2016

...RED FLAG WARNING IN EFFECT FROM EARLY WEDNESDAY THROUGH
THURSDAY FOR THE MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.MODERATE SANTA ANA WINDS AND VERY LOW HUMIDITY WILL CREATE
CRITICAL WEATHER CONDITIONS TODAY AND THURSDAY. THE STRONGEST
WINDS ARE EXPECTED THROUGH AND BELOW THE PASSES AND INTO PORTIONS
OF THE INLAND VALLEYS. GUSTY WINDS HAVE DEVELOPED BELOW THE CAJON
PASS...THE INLAND EMPIRE...THE SANTA ANA MOUNTAINS AND FOOTHILLS
AND INLAND ORANGE COUNTY. CRITICAL FIRE WEATHER CONDITIONS WILL
SPREAD INTO SAN DIEGO COUNTY BY MID- MORNING TODAY. WINDS WILL
WEAKEN SLIGHTLY THIS EVENING BUT INCREASE AGAIN LATE TONIGHT. THE
SANTA ANA WINDS WILL WEAKEN BY FRIDAY...BUT HOT AND DRY CONDITIONS
WILL CONTINUE.

CAZ248-250-255>258-265-554-192100-
/O.CON.KSGX.FW.W.0007.000000T0000Z-161021T0300Z/
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-
429 AM PDT WED OCT 19 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS...VALLEYS
AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 25 MPH WITH LOCAL GUSTS 35 TO 50
  MPH.

* HUMIDITY...FALLING BELOW 15 PERCENT BY LATE MORNING AND MOSTLY
  IN THE SINGLE DIGITS THIS AFTERNOON AND AGAIN THURSDAY AFTERNOON.
  VERY POOR OVERNIGHT RECOVERIES...ESPECIALLY WHERE WINDS PERSIST.

* TIMING...THROUGH THURSDAY EVENING.

* OUTLOOK...WEAKER WINDS THURSDAY NIGHT INTO FRIDAY. HOWEVER...
  HOT AND VERY DRY CONDITIONS WILL PERSIST ON FRIDAY.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

SS
372 
WWUS86 KSGX 192049
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
149 PM PDT WED OCT 19 2016

...RED FLAG WARNING IN EFFECT FROM EARLY WEDNESDAY THROUGH
THURSDAY FOR THE MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.MODERATE SANTA ANA WINDS AND VERY LOW HUMIDITY WILL CREATE
CRITICAL WEATHER CONDITIONS THROUGH THURSDAY. THE STRONGEST WINDS
WILL CONTINUE TO BE BELOW THE CAJON PASS...THE INLAND
EMPIRE...THE SANTA ANA MOUNTAINS AND FOOTHILLS...INLAND ORANGE
COUNTY AND THE FOOTHILLS AND WEST SLOPES OF THE SAN DIEGO COUNTY
MOUNTAINS. WINDS WILL WEAKEN SLIGHTLY LATE THIS AFTERNOON AND THIS
EVENING BUT INCREASE AGAIN LATE TONIGHT. THE SANTA ANA WINDS WILL
WEAKEN BY FRIDAY...BUT HOT AND DRY CONDITIONS WILL CONTINUE THEN.
COOLER WEATHER WITH HIGHER HUMIDITY WILL OCCUR SATURDAY.

CAZ248-250-255>258-265-554-201200-
/O.CON.KSGX.FW.W.0007.000000T0000Z-161021T0300Z/
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-
149 PM PDT WED OCT 19 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY FOR
STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS...VALLEYS
AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 25 MPH WITH LOCAL GUSTS 35 TO 
  50 MPH. 

* HUMIDITY...MINIMUMS OF 7 TO 12 PERCENT THIS AFTERNOON AND 6 TO
  10 PERCENT THURSDAY. VERY POOR OVERNIGHT RECOVERIES...ESPECIALLY
  WHERE WINDS PERSIST.

* TIMING...THROUGH EARLY THURSDAY EVENING.

* OUTLOOK...WEAKER WINDS THURSDAY NIGHT INTO FRIDAY. HOWEVER... 
  HOT AND VERY DRY CONDITIONS WILL PERSIST ON FRIDAY.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

MAXWELL
574 
WWUS86 KSGX 201149
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
449 AM PDT THU OCT 20 2016

...RED FLAG WARNING CONTINUES THROUGH THIS EVENING FOR THE
MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.SANTA ANA WINDS AND VERY LOW HUMIDITY WILL CREATE CRITICAL
WEATHER CONDITIONS ONCE AGAIN TODAY. THE STRONGEST WINDS WILL
CONTINUE TO BE BELOW THE CAJON PASS...THE INLAND EMPIRE... THE
SANTA ANA MOUNTAINS AND FOOTHILLS...INLAND ORANGE COUNTY AND THE
FOOTHILLS AND WEST SLOPES OF THE SAN DIEGO COUNTY MOUNTAINS. THE
SANTA ANA WINDS WILL WEAKEN BY FRIDAY...BUT HOT AND DRY CONDITIONS
WILL CONTINUE. COOLER WEATHER WITH HIGHER HUMIDITY WILL OCCUR
SATURDAY, AND A CHANCE FOR SOME LIGHT RAIN BY SUNDAY.

CAZ248-250-255>258-265-554-202100-
/O.CON.KSGX.FW.W.0007.000000T0000Z-161021T0300Z/
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-
449 AM PDT THU OCT 20 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS...VALLEYS
AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 25 MPH WITH OCCASIONAL GUSTS 35
  TO 50 MPH.

* HUMIDITY...MINIMUMS OF 6 TO 10 PERCENT.

* TIMING...THROUGH THIS EVENING.

* OUTLOOK...WEAKER WINDS TONIGHT INTO FRIDAY. HOWEVER... HOT AND
  VERY DRY CONDITIONS WILL PERSIST ON FRIDAY.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

JMB
574 
WWUS86 KSGX 202018
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
118 PM PDT THU OCT 20 2016

...RED FLAG WARNING CONTINUES THROUGH THIS EVENING FOR THE
MOUNTAINS...VALLEYS AND INLAND ORANGE COUNTY...

.SANTA ANA WINDS AND VERY LOW HUMIDITY WILL CONTINUE CRITICAL
WEATHER CONDITIONS TODAY. THE STRONGEST WINDS WILL CONTINUE TO BE
BELOW THE CAJON PASS...THE INLAND EMPIRE...THE SANTA ANA
MOUNTAINS AND FOOTHILLS...INLAND ORANGE COUNTY AND THE FOOTHILLS
AND WEST SLOPES OF THE SAN DIEGO COUNTY MOUNTAINS. THE SANTA ANA
WINDS WILL WEAKEN THIS EVENING AND FURTHER ON FRIDAY...BUT HOT
AND DRY CONDITIONS WILL CONTINUE. COOLER WEATHER WITH HIGHER
HUMIDITY WILL ARRIVE SATURDAY...AND A CHANCE FOR SOME LIGHT RAIN
BY SUNDAY.

CAZ248-250-255>258-265-554-210300-
/O.CON.KSGX.FW.W.0007.000000T0000Z-161021T0300Z/
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-
118 PM PDT THU OCT 20 2016

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS...VALLEYS
AND INLAND ORANGE COUNTY...

* WIND...NORTHEAST TO EAST 15 TO 25 MPH WITH OCCASIONAL GUSTS 35
  TO 45 MPH.

* HUMIDITY...MINIMUMS OF 6 TO 10 PERCENT.

* TIMING...THROUGH THIS EVENING.

* OUTLOOK...WEAKER WINDS TONIGHT INTO FRIDAY. HOWEVER... HOT 
  AND VERY DRY CONDITIONS WILL PERSIST ON FRIDAY. 

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY.

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 WILL
CONTRIBUTE TO EXTREME FIRE BEHAVIOR.

&&

$$

TS
734 
WWUS86 KSGX 210300
RFWSGX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
800 PM PDT THU OCT 20 2016

.THE RED FLAG WARNING WILL EXPIRE AT 8 PM.

CAZ248-250-255>258-265-554-210400-
/O.EXP.KSGX.FW.W.0007.000000T0000Z-161021T0300Z/
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-
800 PM PDT THU OCT 20 2016

...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR
STRONG GUSTY WINDS AND LOW HUMIDITIES FOR THE MOUNTAINS...VALLEYS
AND INLAND ORANGE COUNTY...

CONDITIONS HAVE IMPROVED ACROSS THE REGION WITH WINDS NOW GUSTING
25 MPH OR LESS IN MOST AREAS...THEREFORE CRITICAL FIRE WEATHER
CONDITIONS ARE NO LONGER EXPECTED. 

THOUGH WINDS HAVE WEAKENED...RH VALUES WILL REMAIN LOW INTO
FRIDAY. THIS WILL KEEP FIRE WEATHER CONDITIONS ELEVATED BUT BELOW
RED FLAG THRESHOLDS. SIGNIFICANT IMPROVEMENT IS EXPECTED OVER THE
WEEKEND AND INTO EARLY NEXT WEEK AS ONSHORE FLOW BRINGS INCREASED
HUMIDITY.

$$

ALBRIGHT

Nearby

Red Flag Warnings in California, 2016Every red flag warning in 2016

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.