Alert archive / California / Red Flag Warnings in 2017

Red Flag Warning 6, NWS Eureka, CA

August 25, 2017

NWS Eureka, CA issued this red flag warning at Aug 25, 2017, 2:36 AM PDT. It took effect at Aug 25, 2017, 9:00 PM PDT. It was in force for 44 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
Aug 25, 2017, 2:36 AM PDT (09:36 UTC)
In effect from
Aug 25, 2017, 9:00 PM PDT
Expired
Aug 27, 2017, 5:00 PM PDT
In force
44 hr
Issued by
NWS Eureka, CA

The text

As transmitted.

284 
WWUS86 KEKA 250936
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
236 AM PDT Fri Aug 25 2017

...A building ridge of high pressure will promote gusty east and
northeast winds along elevated portions of the interior during
the late night and early morning periods. Beginning Friday night
a very dry thermal trough will move over much of NW CA. Single
digit afternoon RH values along with extremely poor recoveries
are expected through Monday...

CAZ203-204-251745-
/O.UPG.KEKA.FW.A.0005.170826T0700Z-170828T0000Z/
/O.NEW.KEKA.FW.W.0006.170826T0400Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
236 AM PDT Fri Aug 25 2017

...RED FLAG WARNING IN EFFECT FROM 9 PM THIS EVENING TO 5 PM PDT
SUNDAY...

The National Weather Service in Eureka has issued a Red Flag
Warning, which is in effect from 9 PM this evening to 5 PM PDT
Sunday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Fire weather zones 203 and 204 for upper slopes
  and ridges above 2000 feet. This includes much of interior Del
  Norte county, as well as portions of far northeast Humboldt and
  far southwest Siskiyou counties.

* WIND...East and Northeast winds 10 to 15 mph...with gusts of 15
  to 25 mph during the late night and early morning
  periods....particularly overnight Friday and early Saturday
  morning. Lighter but occasionally gusty onshore winds during the
  day Saturday and Sunday.

* HUMIDITY...RH recoveries of 15 to 25 percent can be expected 
  during the nighttime periods between Friday night and Monday 
  Night at elevations above 2000 feet. Minimum daytime RH 
  values of 7 to 15 percent across all areas through Monday.

* IMPACTS...New or current ongoing wild fires will likely see
  large and rapid growth.

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.

&&

$$

CAZ211-212-276-277-283-251745-
/O.EXT.KEKA.FW.A.0005.170826T0400Z-170828T0000Z/
Hoopa-Van Duzen/Mad River-Interior Mendocino-
W Mendocino NF/E Mendocino Unit-Trinity-
236 AM PDT Fri Aug 25 2017

...FIRE WEATHER WATCH NOW IN EFFECT FROM THIS EVENING THROUGH
SUNDAY AFTERNOON ABOVE 2000 FEET...

* AFFECTED AREA...All interior Fire weather zones for upper slopes
  and ridges above 2000 feet. This includes zones 211..212...276...277
  and 283. 

* WIND...East and Northeast winds 5 to 10 mph...with gusts of 
  10 to 20 mph during the late night and early morning periods. 
  Daytime winds will remain diurnally driven.

* HUMIDITY...RH recoveries of 15 to 25 percent can be expected 
  during the nighttime periods between Friday night and Monday 
  Night at elevations above 2000 feet. Minimum daytime RH 
  values of 7 to 15 percent across all areas through Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$


http://weather.gov/eureka
10 follow-up statements
601 
WWUS86 KEKA 251637
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
937 AM PDT Fri Aug 25 2017

.A building ridge of high pressure will promote gusty northeast 
and east winds along elevated portions of the interior during the
late night and early morning periods. Beginning tonight, a very 
dry thermal trough will move over much of northwest California. 
Very low afternoon RH values along with poor recoveries are 
expected through Monday.

CAZ211-212-276-277-283-251745-
/O.CAN.KEKA.FW.A.0005.170826T0400Z-170828T0000Z/
Hoopa-Van Duzen/Mad River-Interior Mendocino-
W Mendocino NF/E Mendocino Unit-Trinity-
937 AM PDT Fri Aug 25 2017

...FIRE WEATHER WATCH IS CANCELLED...

The National Weather Service in Eureka has cancelled the Fire
Weather Watch. 

Very low afternoon relative humidity levels along with fair to
poor overnight recoveries are expected to persist for the next 
several days across this area. However, winds are forecast to 
remain light with occasional gusty winds to 20 mph over exposed 
ridgetops.

$$

CAZ203-204-260045-
/O.CON.KEKA.FW.W.0006.170826T0400Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
937 AM PDT Fri Aug 25 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
5 PM SUNDAY...

* AFFECTED AREA...Fire weather zones 203 and 204 for upper 
  slopes and ridges above 2000 feet. This includes much of 
  interior Del Norte county, as well as portions of far 
  northeast Humboldt and far southwest Siskiyou counties. 

* WIND...East and northeast winds 10 to 15 mph with gusts of 15 to
  25 mph during the late night and early morning
  periods...particularly tonight and early Saturday morning. 
  Lighter but occasionally gusty onshore winds during the day 
  Saturday and Sunday. 

* HUMIDITY...RH values as low as 20 to 30 percent can be expected
  during the nighttime periods between Friday night and Monday 
  Night at elevations above 2000 feet. Minimum daytime RH values 
  as low as 15 percent through Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$

http://weather.gov/eureka
241 
WWUS86 KEKA 260054
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
554 PM PDT Fri Aug 25 2017

.A building ridge of high pressure will promote gusty northeast
and east winds across elevated portions of the Upper Smith Lower
Middle Klamath Zones tonight and early Saturday Morning. Although
the winds will diminish late Saturday...a very dry air mass will 
move over much of northwest California...giving way to critically 
low afternoon RH values along with extremely poor recoveries 
through Tuesday.

CAZ203-204-261300-
/O.CON.KEKA.FW.W.0006.170826T0400Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
554 PM PDT Fri Aug 25 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
5 PM PDT SUNDAY FOR UPPER SLOPES AND RIDGES ABOVE 2000 FT ACROSS
ZONES 203 AND 204...

* AFFECTED AREA...Fire weather zoned 203 and 204.

* WIND...East and northeast winds 10 to 15 mph with gusts to 25
  mph late night and early Saturday morning. Lighter but 
  occasionally gusty onshore winds during the day Saturday and 
  Sunday.

* HUMIDITY...RH values as low as 20 to 30 percent can be expected
  during the nighttime periods between Friday night and Monday
  Night along exposed elevations above 2000 feet...with Minimum
  daytime RH values as low as 7 to 12 percent through Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
408 
WWUS86 KEKA 261027
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
327 AM PDT Sat Aug 26 2017

.A building ridge of high pressure will promote gusty northeast
and east winds across elevated portions of the Upper Smith Lower
Middle Klamath Zones through Saturday Morning. Although the winds
will diminish during the day today...a very dry air mass will 
move over much of northwest California...giving way to critically 
low afternoon RH values along with extremely poor recoveries 
through Tuesday.

CAZ203-204-261830-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
327 AM PDT Sat Aug 26 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SUNDAY...

* AFFECTED AREA...Fire weather zoned 203 and 204.

* WIND...East and northeast winds 10 to 15 mph with gusts to 25
  mph early Saturday morning. Lighter but occasionally gusty 
  onshore winds during the day Saturday and Sunday.

* HUMIDITY...RH values as low as 20 to 30 percent can be expected
  during the nighttime periods between early Saturday morning and
  Monday Night along exposed elevations above 2000 feet...with 
  Minimum daytime RH values as low as 7 to 12 percent through 
  Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
629 
WWUS86 KEKA 261029 CCA
RFWEKA

Urgent - Fire Weather Message...CORRECTED
National Weather Service Eureka CA
329 AM PDT Sat Aug 26 2017

.A building ridge of high pressure will promote gusty northeast
and east winds across elevated portions of the Upper Smith Lower
Middle Klamath Zones through Saturday Morning. Although the winds
will diminish during the day today...a very dry air mass will 
move over much of northwest California...giving way to critically 
low afternoon RH values along with extremely poor recoveries 
through Tuesday.

CAZ203-204-261830-
/O.COR.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
329 AM PDT Sat Aug 26 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SUNDAY...

* AFFECTED AREA...Fire weather zones 203 and 204.

* WIND...East and northeast winds 10 to 15 mph with gusts to 25
  mph early Saturday morning. Lighter but occasionally gusty 
  onshore winds during the day Saturday and Sunday.

* HUMIDITY...RH values as low as 20 to 30 percent can be expected
  during the nighttime periods between early Saturday morning and
  Monday Night along exposed elevations above 2000 feet...with 
  Minimum daytime RH values as low as 7 to 12 percent through 
  Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
114 
WWUS86 KEKA 261818
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
1118 AM PDT Sat Aug 26 2017

.Although the winds will diminish during the day today...a very 
dry air mass will move over much of northwest California...giving 
way to critically low afternoon RH values along with extremely 
poor recoveries through Tuesday.

CAZ203-204-270230-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
1118 AM PDT Sat Aug 26 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SUNDAY...

* AFFECTED AREA...Fire weather zones 203 and 204.

* WIND...East and northeast winds 5 to 15 mph with occasionally 
  gusty onshore winds during the day Saturday and Sunday.

* HUMIDITY...RH values as low as 20 to 30 percent can be 
  expectedduring the nighttime periods between early Saturday 
  morning and Monday Night along exposed elevations above 2000 
  feet...with Minimum daytime RH values as low as 7 to 12 
  percent through Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
187 
WWUS86 KEKA 262310
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
410 PM PDT Sat Aug 26 2017

A very dry air mass is currently over much of northwest 
California...giving way to critically low afternoon RH values 
along with extremely poor recoveries through Tuesday.

CAZ203-204-270715-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
410 PM PDT Sat Aug 26 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SUNDAY...

* AFFECTED AREA...Fire weather zones 203 and 204.

* WIND...East and northeast winds 5 to 10 mph with occasionally 
  gusty onshore winds during the day Saturday and Sunday.

* HUMIDITY...RH values as low as 15 to 25 percent can be expected
  during the nighttime periods Saturday night and Monday night
  along exposed elevations above 2000 feet...with minimum daytime
  RH values as low as 5 to 10 percent through Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
534 
WWUS86 KEKA 270558
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
1058 PM PDT Sat Aug 26 2017

A very dry air mass is currently over much of northwest
California...giving way to critically low afternoon RH values
along with extremely poor recoveries through Tuesday.

CAZ203-204-271400-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
1058 PM PDT Sat Aug 26 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT SUNDAY...

* AFFECTED AREA...Fire weather zones 203 and 204..

* WIND...East and northeast winds 5 to 10 mph with occasionally 
  gusty onshore winds during the day Saturday and Sunday.

* HUMIDITY...RH values as low as 15 to 25 percent can be 
  expectedduring the nighttime periods Saturday night and 
  Monday night along exposed elevations above 2000 feet...with 
  minimum daytime RH values as low as 5 to 10 percent through 
  Monday.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
382 
WWUS86 KEKA 271007
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
307 AM PDT Sun Aug 27 2017

A very dry air mass is currently over much of northwest
California...giving way to critically low afternoon RH values
along with extremely poor recoveries through Tuesday. Winds will
be mostly light but periodically gusty, with onshore/upslope flow
during the day and offshore/downslope flow at night. 

CAZ203-204-271815-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
307 AM PDT Sun Aug 27 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT THIS
AFTERNOON...

* AFFECTED AREA...Fire weather zones 203 and 204..

* WIND...East 5 to 15 mph early Sunday morning, becoming west 5 
  to 15 mph in the afternoon.

* HUMIDITY...RH values as low as 15 to 25 percent can be expected
  early Sunday morning along exposed elevations above 2000 
  feet...with minimum daytime RH values as low as 5 to 10 percent 
  through Monday. 

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
997 
WWUS86 KEKA 271734
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
1034 AM PDT Sun Aug 27 2017

A very dry air mass is currently over much of northwest
California...giving way to critically low afternoon RH values
along with extremely poor recoveries through Tuesday. Winds will
be mostly light but periodically gusty, with onshore/upslope flow
during the day and offshore/downslope flow at night.

CAZ203-204-280000-
/O.CON.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
1034 AM PDT Sun Aug 27 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM THIS 
AFTERNOON...

* AFFECTED AREA...Fire weather zones 203 and 204..

* WIND...East 5 to 15 mph early Sunday morning, becoming west 5 
  to 15 mph in the afternoon.

* HUMIDITY...Minimum daytime RH values as low as 5 to 10 percent
  through Monday, with overnight recoveries of 20 to 30 percent.

* IMPACTS...New or current ongoing wild fires will likely see 
  large and rapid growth.

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.

$$


http://weather.gov/eureka
940 
WWUS86 KEKA 272353
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
453 PM PDT Sun Aug 27 2017


CAZ203-204-280100-
/O.EXP.KEKA.FW.W.0006.000000T0000Z-170828T0000Z/
Upper Smith-Lower Middle Klamath-
453 PM PDT Sun Aug 27 2017

...RED FLAG WARNING HAS BEEN CANCELED...

Although the region will remain very dry...winds
have diminished allowing the warning to end. 

$$


http://weather.gov/eureka

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 8:46 PM PDTFire Weather WatchEKA13 hr
Aug 25, 2:21 AM PDTHazardous Seas WarningEKA24 hr

Nearby

Red Flag Warnings in California, 2017Every red flag warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.