Alert archive / Washington / Red Flag Warnings in 2017

Red Flag Warning 1, NWS Seattle, WA

July 31, 201712 counties in Washington

NWS Seattle, WA issued this red flag warning at Jul 31, 2017, 3:00 PM PDT for 12 counties in Washington. It took effect at Aug 1, 2017, 2:00 PM PDT. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 31, 2017, 3:00 PM PDT (22:00 UTC)
In effect from
Aug 1, 2017, 2:00 PM PDT
Expired
Aug 4, 2017, 3:31 PM PDT
In force
3 days
Issued by
NWS Seattle, WA

Counties Clallam County, WA, Grays Harbor County, WA, Jefferson County, WA, King County, WA, Lewis County, WA, Mason County, WA, Pierce County, WA, Skagit County, WA, Skamania County, WA, Snohomish County, WA, Thurston County, WA, Whatcom County, WA

The radar

The Seattle radar (KATX), 79 km from the middle of the area, began a volume at 22:01 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

Quillayute State, WA (KUIL), launched 12:00Z, 10.0 hours before the alert went out and 152 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, Quillayute State, WA at 12:00Z on 2017-07-31Temperature 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, Quillayute State, WA at 12:00Z on 2017-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
1653 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

464 
WWUS86 KSEW 312200
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
300 PM PDT Mon Jul 31 2017

WAZ658-659-010600-
/O.UPG.KSEW.FW.A.0001.170801T2100Z-170804T0600Z/
/O.NEW.KSEW.FW.W.0001.170801T2100Z-170804T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
300 PM PDT Mon Jul 31 2017

...RED FLAG WARNING IN EFFECT FROM 2 PM TUESDAY TO 11 PM PDT
THURSDAY FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES
658 AND 659...

The National Weather Service in Seattle has issued a Red Flag
Warning, which is in effect from 2 PM Tuesday to 11 PM PDT
Thursday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Fire weather zones 658 and 659.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..Upper 70s to lower 90s Tuesday, warming into the
  80s to mid 90s on Wednesday, and mainly 90s Thursday. 

* IMPACTS...Conditions will becoming favorable for rapid spread on
  any new or existing fires. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts. 

&&

$$

WAZ654-655-657-010600-
/O.NEW.KSEW.FW.A.0002.170802T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Black Hills and Southwest Interior Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
300 PM PDT Mon Jul 31 2017

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY EVENING FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER
ZONES 654, 655, AND 657...

The National Weather Service in Seattle has issued a Fire Weather
Watch, which is in effect from Wednesday afternoon through
Thursday evening. 

* AFFECTED AREA...Fire weather zone 654. Fire weather zone 655. 
  Fire weather zone 657. 

* HAINES...Midlevel Haines rising to 6 or high.

* TEMPERATURES/HUMIDITY...Wednesday highs in these areas will rise
  to the mid and upper 90s, and on Thursday range from 96 to 104.
  Relative humidities Wednesday afternoon to drop into the lower
  to mid 20 percent range, and on Thursday afternoon range from
  the upper teens to mid 20s. 

* IMPACTS...Conditions may become favorable for rapid spread on
  any new or existing fires. Any outdoor burning is not
  recommended. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

www.weather.gov/seattle/
12 follow-up statements
847 
WWUS86 KSEW 011150
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
450 AM PDT Tue Aug 1 2017

WAZ658-659-012000-
/O.CON.KSEW.FW.W.0001.170801T2100Z-170804T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
450 AM PDT Tue Aug 1 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
11 PM PDT THURSDAY FOR VERY HOT AND DRY CONDITIONS FOR FIRE
WEATHER ZONES 658 AND 659...

* AFFECTED AREA...Fire weather zones 658 and 659.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..Upper 70s to lower 90s Tuesday, warming into 
  the 80s to mid 90s on Wednesday, and mainly 90s Thursday. 

* IMPACTS...Conditions will becoming favorable for rapid spread
  on any new or existing fires. Outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ654-655-657-012000-
/O.CON.KSEW.FW.A.0002.170802T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Black Hills and Southwest Interior Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
450 AM PDT Tue Aug 1 2017

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY EVENING FOR VERY HOT AND DRY CONDITIONS FOR FIRE
WEATHER ZONES 654, 655, AND 657...

* AFFECTED AREA...Fire weather zone 654. Fire weather zone 655. 
  Fire weather zone 657. 

* HAINES...Midlevel Haines rising to 6 or high.

* TEMPERATURES/HUMIDITY...Wednesday highs in these areas will
  rise to the mid and upper 90s, and on Thursday range from 96 
  to 104. Relative humidities Wednesday afternoon to drop into 
  the lower to mid 20 percent range, and on Thursday afternoon 
  range from the upper teens to mid 20s. 

* IMPACTS...Conditions may become favorable for rapid spread on 
  any new or existing fires. Any outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


www.weather.gov/seattle
319 
WWUS86 KSEW 012107
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
207 PM PDT Tue Aug 1 2017

...Olympic Mountain fire weather zones added to the Red Flag
Warning...

.Unstable conditions will extend farther west and include the
Olympics. Meeting Red Flag Warning criteria for the south sound
and southwest Washington looks less likely, but still possible,
mainly for a Thursday afternoon.

WAZ652-661-020515-
/O.EXA.KSEW.FW.W.0001.170801T2100Z-170804T0600Z/
West Portion of the Olympic Mountains-
East Portion of the Olympic Mountains-
207 PM PDT Tue Aug 1 2017

...RED FLAG WARNING IN EFFECT UNTIL 11 PM PDT THURSDAY FOR VERY
HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 652 AND 661...

The National Weather Service in Seattle has issued a Red Flag
Warning, which is in effect until 11 PM PDT Thursday. 

* AFFECTED AREA...Fire weather zone 652.Fire weather zone 661.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..Upper 70s to lower 90s Tuesday, warming into 
  the 80s to mid 90s on Wednesday, and mainly 90s Thursday.

* IMPACTS...Conditions will becoming favorable for rapid spread 
  on any new or existing fires. Outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ658-659-020515-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
207 PM PDT Tue Aug 1 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THURSDAY
FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 658 AND 
659...

* AFFECTED AREA...Fire weather zone 658.Fire weather zone 659.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..Upper 70s to lower 90s Tuesday, warming into 
  the 80s to mid 90s on Wednesday, and mainly 90s Thursday.

* IMPACTS...Conditions will becoming favorable for rapid spread 
  on any new or existing fires. Outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ654-655-657-020515-
/O.CON.KSEW.FW.A.0002.170802T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Black Hills and Southwest Interior Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
207 PM PDT Tue Aug 1 2017

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY EVENING FOR VERY HOT AND DRY CONDITIONS FOR FIRE
WEATHER ZONES 654, 655, AND 657...

* AFFECTED AREA...Fire weather zone 654.Fire weather zone 
  655.Fire weather zone 657. 

* HAINES...Midlevel Haines rising to 6 or high.

* TEMPERATURES/HUMIDITY...Wednesday highs in these areas will 
  rise to the mid and upper 90s, and on Thursday range from 96 
  to 104. Relative humidities Wednesday afternoon to drop into 
  the lower to mid 20 percent range, and on Thursday afternoon 
  range from the upper teens to mid 20s.

* IMPACTS...Conditions may become favorable for rapid spread on 
  any new or existing fires. Any outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
234 
WWUS86 KSEW 020459
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
959 PM PDT Tue Aug 1 2017

.Unstable conditions will extend farther west and include the 
Olympics in addition to the Cascades. Meeting Red Flag Warning 
criteria for the south sound and southwest Washington looks less 
likely, but still possible, mainly for a Thursday afternoon.

WAZ652-658-659-661-021700-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
959 PM PDT Tue Aug 1 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THURSDAY
FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 652, 658, 
659, AND 661...

* AFFECTED AREA...Fire weather zones 652, 658, 659, and 661.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..Upper 70s to lower 90s Tuesday, warming into 
  the 80s to mid 90s on Wednesday, and mainly 90s Thursday.

* IMPACTS...Conditions will becoming favorable for rapid spread 
  on any new or existing fires. Outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ654-655-657-021700-
/O.CON.KSEW.FW.A.0002.170802T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Black Hills and Southwest Interior Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
959 PM PDT Tue Aug 1 2017

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY EVENING FOR VERY HOT AND DRY CONDITIONS.

* FOR FIRE WEATHER ZONES 654, 655, AND 657...

* AFFECTED AREA...Fire weather zone 654. Fire weather zone 
  655. Fire weather zone 657. 

* HAINES...Midlevel Haines rising to 6 or higher.

* TEMPERATURES/HUMIDITY...Wednesday highs in these areas will 
  rise to the mid and upper 90s, and on Thursday range from 96 
  to 104. Relative humidities Wednesday afternoon to drop into 
  the lower to mid 20 percent range, and on Thursday afternoon 
  range from the upper teens to mid 20s.

* IMPACTS...Conditions may become favorable for rapid spread on 
  any new or existing fires. Any outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


www.weather.gov/seattle
795 
WWUS86 KSEW 021525
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
825 AM PDT Wed Aug 2 2017

.Dry unstable conditions will continue into Thursday particularly
in the Cascades and Olympics. Meeting Red Flag Warning criteria 
for the Puget Sound area lowlands south into the southwest
interior looks less likely, but still possible for Thursday 
afternoon.

WAZ652-658-659-661-022330-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
825 AM PDT Wed Aug 2 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THURSDAY
FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 652, 658,
659, AND 661...

* AFFECTED AREA...Fire weather zones 652, 658, 659, and 661.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..80s to mid 90s on today, and mainly 90s Thursday.

* IMPACTS...Conditions are favorable for rapid spread on any new 
  or existing fires. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ654-655-657-022330-
/O.EXT.KSEW.FW.A.0002.170803T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Black Hills and Southwest Interior Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
825 AM PDT Wed Aug 2 2017

...FIRE WEATHER WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON
THROUGH THURSDAY EVENING FOR VERY HOT AND DRY CONDITIONS FOR FIRE
WEATHER ZONES 654, 655, AND 657...

* FOR FIRE WEATHER ZONES 654, 655, AND 657...

* AFFECTED AREA...Fire weather zone 654. Fire weather zone 655. 
  Fire weather zone 657.

* HAINES...Midlevel Haines rising to 6 or higher.

* TEMPERATURES/HUMIDITY...Highs today in the 90s and Thursday
  ranging from 96 to 104. Relative humidities this afternoon to
  drop into the lower to mid 20 percent range, and Thursday 
  afternoon range from the upper teens to mid 20s.

* IMPACTS...Conditions may become favorable for rapid spread on 
  any new or existing fires. Any outdoor burning is not 
  recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

www.weather.gov/seattle/
938 
WWUS86 KSEW 022135
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
235 PM PDT Wed Aug 2 2017

.Dry unstable conditions will continue into Thursday particularly
in the Cascades and Olympics as well as the south interior
lowlands. Conditions are expected to slowly ease Friday into the
weekend as daytime temperatures moderate from the hot conditions
on Wednesday and Thursday. 655. E

WAZ654-657-022245-
/O.CAN.KSEW.FW.A.0002.170803T2100Z-170804T0600Z/
Central and South Puget Sound Lowlands-
Southeast Puget Sound Lowlands Generally Below 1500 Feet-
235 PM PDT Wed Aug 2 2017

...FIRE WEATHER WATCH IS CANCELLED FOR VERY HOT AND DRY
CONDITIONS FOR FIRE WEATHER ZONES 654 AND 657...

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

Relative humidities are expected to drop into the 20 to 30 percent
range Thursday afternoon and evening, not quite reaching the 
below 20 percent threshold for a warning. Despite relative 
humidities not dropping below 20 percent, conditions will be hot 
and dry for a continued threat wildfire conditions. 

$$

WAZ655-030545-
/O.UPG.KSEW.FW.A.0002.170803T2100Z-170804T0600Z/
/O.EXB.KSEW.FW.W.0001.170803T2100Z-170804T0600Z/
Black Hills and Southwest Interior Lowlands-
235 PM PDT Wed Aug 2 2017

...RED FLAG WARNING IN EFFECT FROM 2 PM TO 11 PM PDT THURSDAY FOR
VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONE 655...

The National Weather Service in Seattle has issued a Red Flag
Warning, which is in effect from 2 PM to 11 PM PDT Thursday. The
Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Fire weather zone 655.  

* HAINES...Midlevel Haines rising to 6 or higher.

* TEMPERATURES/HUMIDITY...Highs Thursday ranging from 96 to 104.
  Relative humidities Thursday afternoon will range from the mid
  teens to mid 20s.

* IMPACTS...Conditions will be favorable for rapid spread on any
  new or existing fires. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts. 

&&

$$

WAZ652-658-659-661-030545-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
235 PM PDT Wed Aug 2 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THURSDAY
FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 652, 658,
659, AND 661...

* AFFECTED AREA...Fire weather zones 652, 658, 659, and 661.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the 
  afternoons with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..80s to mid 90s on late today, and mainly in the 90s
  Thursday.

* IMPACTS...Conditions are favorable for rapid spread on any new
  or existing fires. Avoid any outdoor burning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

www.weather.gov/seattle/
666 
WWUS86 KSEW 030340
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
840 PM PDT Wed Aug 2 2017

.Dry and unstable conditions will continue into Thursday,  
particularly in the Cascades and Olympics as well as the south 
interior lowlands. Daytime temperatures are expected to moderate 
slightly over the weekend.

WAZ652-658-659-661-031515-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
840 PM PDT Wed Aug 2 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THURSDAY
FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONES 652, 658,
659, AND 661...

* AFFECTED AREA...Fire weather zones 652, 658, 659, and 661.

* HAINES...Midlevel Haines of 6.

* RELATIVE HUMIDITY...As low as 15 to 20 percent during the
  afternoon with poor overnight recoveries of 45 to 65 percent.

* TEMPERATURES..90s to around 100 Thursday.

* IMPACTS...Conditions are favorable for rapid spread on any 
  new or existing fires. Avoid any outdoor burning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$

WAZ655-031515-
/O.CON.KSEW.FW.W.0001.170803T2100Z-170804T0600Z/
Black Hills and Southwest Interior Lowlands-
840 PM PDT Wed Aug 2 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 11 PM PDT
THURSDAY FOR VERY HOT AND DRY CONDITIONS FOR FIRE WEATHER ZONE
655...

* AFFECTED AREA...Fire weather zone 655.

* HAINES...Midlevel Haines rising to 6 or higher.

* TEMPERATURES/HUMIDITY...Highs Thursday ranging from 95 to 102. 
  Relative humidities Thursday afternoon will range from the mid 
  teens to mid 20s.

* IMPACTS...Conditions will be favorable for rapid spread on 
  any new or existing fires. Avoid any outdoor burning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid any fire starts including campfires and use of fireworks.
Contact fire authorities immediately if a fire starts.

&&

$$


www.weather.gov/seattle
957 
WWUS86 KSEW 031630
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
930 AM PDT Thu Aug 3 2017

WAZ652-658-659-661-040030-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
930 AM PDT Thu Aug 3 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER 
ZONES 652, 658, 659, AND 661...

* AFFECTED AREA...Fire weather zones 652, 658, 659, and 661.

* HAINES...Midlevel Haines of 5 or 6.

* RELATIVE HUMIDITY...Mainly in the 15-25 percent range. 

* TEMPERATURES..Reaching into mainly the 90s in the valleys/lower
  slopes and the lower 80s to lower 90s ridges/upper slopes.

* IMPACTS...A dry and unstable air mass with hot temperatures can
  contribute to active fire behavior. In western Washington,
  significant growth on existing fires takes place under such
  conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions 
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

WAZ655-040030-
/O.CON.KSEW.FW.W.0001.170803T2100Z-170804T0600Z/
Black Hills and Southwest Interior Lowlands-
930 AM PDT Thu Aug 3 2017

...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
11 PM PDT THIS EVENING FOR VERY HOT...DRY AND UNSTABLE CONDITIONS
FOR FIRE WEATHER ZONE 655...

* AFFECTED AREA...Fire weather zone 655.

* HAINES...Midlevel Haines 5 or 6.

* HUMIDITY...Mainly mid teens to mid 20s.

* TEMPERATURES...Reaching into the lower 90s to near 102 degrees.

* IMPACTS...A dry and unstable air mass with hot temperatures can
  contribute to active fire behavior. In western Washington,
  significant growth on existing fires takes place under such
  conditions. Avoid any outdoor burning. 

PRECAUTIONARY/PREPAREDNESS  ACTIONS...

A Red Flag Warning means that critical fire weather conditions 
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.


&&

$$

www.weather.gov/seattle
359 
WWUS86 KSEW 032205
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
305 PM PDT Thu Aug 3 2017

WAZ658-040615-
/O.NEW.KSEW.FW.A.0003.170804T1800Z-170805T0600Z/
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
305 PM PDT Thu Aug 3 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE 
WEATHER ZONE 658...
...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH 
FRIDAY EVENING FOR VERY HOT, DRY, AND UNSTABLE CONDITIONS FOR 
FIRE WEATHER ZONE 658...

The National Weather Service in Seattle has issued a Fire Weather
Watch, which is in effect from Friday morning through Friday
evening. 

* AFFECTED AREA...Fire weather zone 658.

* HAINES...Midlevel Haines of 5 or 6 through this evening and,
  again, Friday afternoon and evening.

* RELATIVE HUMIDITY...Poor recoveries mainly in the 55-70 percent
  range overnight, with min humidities mainly in the 15-30 
  percent range.

* TEMPERATURES...Remaining well above normal. Max temperatures on
  Friday will be mainly in the upper 80s to upper 90s in the
  valleys/lower slopes and the lower 80s to lower 90s ridges/ 
  upper slopes. 

* IMPACTS...A dry and unstable air mass with hot temperatures 
  can contribute to active fire behavior. In western Washington, 
  significant growth on existing fires takes place under such 
  conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

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

&&

$$

WAZ652-655-659-661-040600-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
Black Hills and Southwest Interior Lowlands-
West Slopes of the Central Cascades Generally above 1500 Feet-
East Portion of the Olympic Mountains-
305 PM PDT Thu Aug 3 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE 
WEATHER ZONES 652, 655, 659, AND 661...

* AFFECTED AREA...Fire weather zone 652, 655, 659, and 661.

* HAINES...Midlevel Haines of 5 or 6 through this evening.

* MIN HUMIDITY...Mainly in the 15-30 percent range.

* MAX TEMPERATURE...Low 90s to near 102 degrees valleys/lower
  slopes and lower 80s to lower 90s ridges/upper slopes.

* IMPACTS...A dry and unstable air mass with hot temperatures 
  can contribute to active fire behavior. In western Washington, 
  significant growth on existing fires takes place under such 
  conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

www.weather.gov/seattle
474 
WWUS86 KSEW 040506
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
1006 PM PDT Thu Aug 3 2017

WAZ658-041800-
/O.CAN.KSEW.FW.A.0003.170804T1800Z-170805T0600Z/
/O.EXT.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
1006 PM PDT Thu Aug 3 2017

...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT FRIDAY FOR VERY
HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONE 658...
...FIRE WEATHER WATCH IS CANCELLED...

The National Weather Service in Seattle has cancelled the Fire
Weather Watch and replaced it with a Red Flag Warning.  

* AFFECTED AREA...Fire weather zone 658.

* HAINES...Midlevel Haines of 5 or 6.

* MIN HUMIDITY...Mainly in the 15-30 percent range.

* MAX TEMPERATURE...Friday...low 90s to near 102 degrees 
  valleys/lower slopes and lower 80s to lower 90s ridges/upper 
  slopes.

* IMPACTS...A dry and unstable air mass with hot temperatures can
  contribute to active fire behavior. In Western Washington, 
  significant growth on existing fires takes place under such 
  conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

WAZ659-041800-
/O.EXT.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the Central Cascades Generally above 1500 Feet-
1006 PM PDT Thu Aug 3 2017

...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT FRIDAY FOR VERY
HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONE 659...

* AFFECTED AREA...Fire weather zone 659.

* HAINES...Midlevel Haines of 5 or 6.

* MIN HUMIDITY...Mainly in the 15-30 percent range.

* MAX TEMPERATURE...Friday...low 90s to near 102 degrees 
  valleys/lower slopes and lower 80s to lower 90s ridges/upper 
  slopes.

* IMPACTS...A dry and unstable air mass with hot temperatures 
  can contribute to active fire behavior. In western 
  Washington, significant growth on existing fires takes place 
  under such conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

WAZ652-655-661-040615-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170804T0600Z/
West Portion of the Olympic Mountains-
Black Hills and Southwest Interior Lowlands-
East Portion of the Olympic Mountains-
1006 PM PDT Thu Aug 3 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE
WEATHER ZONES 652, 655, AND 661...

* AFFECTED AREA...Fire weather zone 652, 655, 659, and 661.

* HAINES...Midlevel Haines of 5 or 6 through this evening.

* MIN HUMIDITY...Mainly in the 15-30 percent range.

* IMPACTS...A dry and unstable air mass with hot temperatures 
  can contribute to active fire behavior. In western 
  Washington, significant growth on existing fires takes place 
  under such conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$


www.weather.gov/seattle
380 
WWUS86 KSEW 041015
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
315 AM PDT Fri Aug 4 2017

WAZ658-659-041800-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
315 AM PDT Fri Aug 4 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE
WEATHER ZONES 658 AND 659...

* AFFECTED AREA...Fire weather zones 658 and 659.

* HAINES...Mid-level Haines of 6.

* MIN HUMIDITY...Mainly in the 20 to 35 percent range.

* MAX TEMPERATURE...90s valleys/lower slopes and 80s to lower 90s
  ridges/upper slopes.

* IMPACTS...A dry and unstable air mass with hot temperatures 
  can contribute to active fire behavior. In western 
  Washington, significant growth on existing fires takes place 
  under such conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$


www.weather.gov/seattle
194 
WWUS86 KSEW 041749
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
1049 AM PDT Fri Aug 4 2017

WAZ658-050200-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
1049 AM PDT Fri Aug 4 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE 
WEATHER ZONE 658...

* AFFECTED AREA...Fire weather zone 658.

* MIDLEVEL HAINES...5 (moderate) or 6 (high).

* MIN HUMIDITY...Mainly in the 15 to 30 percent range.

* MAX TEMPERATURE...Mainly the 90s valleys/lower slopes and the 
  lower 80s to lower 90s ridges/upper slopes. 

* IMPACTS...A dry and unstable air mass with hot temperatures can
  contribute to active fire behavior. In Western Washington, 
  significant growth on existing fires takes place under such 
  conditions. Avoid any outdoor burning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

WAZ659-050200-
/O.CON.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the Central Cascades Generally above 1500 Feet-
1049 AM PDT Fri Aug 4 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING FOR VERY HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE 
WEATHER ZONE 659...

* AFFECTED AREA...Fire weather zone 659.

* MIDLEVEL HAINES...Mainly 4 (low) or 5 (moderate)

* MIN HUMIDITY...Mainly in the 25 to 35 percent range.

* MAX TEMPERATURE...Mainly low 80s to mid 90s valleys/lower slopes 
  and in the 80s ridges/upper slopes. 

* IMPACTS...Conditions are favorable for the rapid spread on any 
  new or existing fires. Avoid any outdoor burning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. Conditions are
favorable for the rapid spread on any new or existing fires.

&&

$$

www.weather.gov/seattle
930 
WWUS86 KSEW 042231
RFWSEW

URGENT - FIRE WEATHER MESSAGE
National Weather Service Seattle WA
331 PM PDT Fri Aug 4 2017

WAZ658-659-042345-
/O.CAN.KSEW.FW.W.0001.000000T0000Z-170805T0600Z/
West Slopes of the North Cascades Generally above 1500 Feet-
West Slopes of the Central Cascades Generally above 1500 Feet-
331 PM PDT Fri Aug 4 2017

...RED FLAG WARNING IS CANCELLED FOR VERY HOT, DRY, AND UNSTABLE 
CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659...

The National Weather Service in Seattle has cancelled the Red
Flag Warning. 

Temperatures were lower and humidities higher than yesterday due
to light onshore flow. Dense smoke also kept temperatures down in
Whatcom and Skagit counties. Although the midlevel Haines Index was
in the moderate or high range in zone 658, weather conditions 
were not favorable for contributing to active fire growth. 

The air mass was more stable over zone 659 than yesterday, with 
the midlevel Haines Index expected to remain in the low to 
moderate range. Lower temperatures and higher humidity along with
a stable air mass has prevented critical fire weather conditions
from being met.

Although the Red Flag Warning has been cancelled, fire weather 
conditions will remain elevated due to a persistent pattern of 
below normal rainfall with above normal temperatures.

$$

www.weather.gov/seattle

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 Seattle, WA wrote its last area forecast discussion before this red flag warning went out at Jul 31, 3:00 PM PDT, 0 minutes earlier.

Area forecast discussion, Jul 31, 3:00 PM PDT, 0 minutes before
Area Forecast Discussion
National Weather Service Seattle WA
300 PM PDT Mon Jul 31 2017

.SYNOPSIS...A strong upper ridge will build northward off the
Pacific Northwest coast this week. This will induce low level
offshore flow and bring several days of unusually hot weather to
Western Washington. Widespread record highs are likely Wednesday
and Thursday. The ridge will slowly weaken on Friday and move
inland slowly over the weekend for a gradual cooling trend.

&&

.SHORT TERM...An upper ridge will build off the coast the next
few days. At the same time, the air aloft will warm, rising to a
remarkable +25C or so by Thursday. The low level flow never turns
easterly or strongly offshore however. Instead, the low level
flow will be northerly each day which will temper the warming ever
so slightly. Still, highs will warm over the next few days for
the beginning of an extended heat wave. Records are likely by
Wednesday. Thursday looks like the hottest day for most spots with
widespread 90s and as high as 104 for parts of the south interior.
An excessive heat warning is in effect for the interior from the
Everett area south. The mountains, north interior, and coast will
also be hot Wednesday and Thursday but not quite as hot and probably
more in the advisory category. Schneider

.LONG TERM...Friday will be the start of a slow cooling trend. The
upper ridge axis will remain offshore but upper heights will
begin to fall. Low level flow will also turn more westerly. The
coast should see 10-15 degrees of cooling but it will be another
hot day for the interior with highs only a few degrees cooler. The
upper ridge will slowly shift inland Saturday through Monday.
Emphasis on slowly. The ridge axis doesn't really shift east of
the area until Monday and there is never what one would call a
marine push day. Rather, low level onshore flow will gradually
increase each day. There will be a corresponding gradual cooling
trend with highs finally back to near normal by Monday. There will
also be a return to some night and morning clouds over the
weekend as onshore flow increases. Lastly, models hint at some
possible convection over the Cascades Sunday and Monday afternoon
as unstable southerly flow aloft increases. Schneider

&&

.AVIATION...Dry westerly flow aloft will continue this
afternoon and tonight before turning northwesterly Tuesday morning
as a strong upper ridge builds over the area. Moderate onshore
surface flow will continue to ease this afternoon and evening before
becoming northerly/offshore tonight. The air mass will remain stable
and dry as clear skies are expected to remain in place over the bulk
of W WA...although HQM may see some fog very early Tuesday morning.

KSEA...Clear skies persist for the entirety of the TAF period.
Northerly wind 8-12 kt. CHB/SMR

&&

.MARINE...Onshore flow will continue to ease this afternoon and
evening before becoming northerly/offshore overnight tonight.
A thermally induced trough of low pressure will develop along the
coast and remain in place through the week...allowing for this
northerly/offshore flow to persist.

Flow through the strait will be lighter the rest of this week.
Northwesterly small craft advisory winds will be possible at times
over the coastal waters, especially central and south portions.
Current forecast has a brief break in SCA winds for the south and
central inner coastal water zones before winds pick up again Tuesday
afternoon. Will allow current headline to run its course for these
zones and leave it to next shift to post next SCA. The outer coastal
water zones, however, keep SCA winds well into Tuesday night...and
as such have extended the current SCA in place there by another 24
hours. Wind is forecast to remain under 20 kt over the inland
waters. CHB/SMR

&&

.FIRE WEATHER...The combination of a strengthening upper level
ridge over the western U.S. and developing low level offshore flow
as a thermally induce surface trough noses north along the Oregon
coast promises hot dry conditions this week. This weather pattern
is developing critical fire weather conditions starting Tuesday
afternoon. Thursday looks to be the peak of this event with high
temperatures approaching all-time records.

This pattern will push temperatures up each day through Thursday
while relative humidities drop. Have changed the fire weather watch
in the Cascade fire weather zones - (658 and 659) to a Red Flag
Warning starting Tuesday afternoon. Have also issued a fire weather
watch for western interior fire zones 657, 654, and 655 starting
Wednesday afternoon as RHs drop to at least 20 percent and the
Haines Index climbs to 6 or high.

This is the pattern that will result in the overnight thermal belt
as well. Warm nighttime temperatures with poor RH recoveries are
anticipated in the Cascade foothills Tuesday night through Thursday
night.

The rest of Western Washington will also be hot and dry with fire
weather conditions approaching critical levels. Bottom line is this
weather pattern combined with the ongoing dry conditions since mid
June is ripe to produce wildfires in the area. All precautions
should be taken to avoid the potential for wildfires and all fire
units should be ready to respond in case of fire.

Late this week, the longer range guidance is now slower in breaking
down this weather pattern. Thursday may be the hottest day, but
Friday may be only a bit cooler with the coast seeing the greatest
relief. By the weekend, the  surface thermal trough should shift
east of the Cascades permitting some onshore flow for moderating
temperatures. Still no rain in sight though. Any threat of
convection this weekend likely to remain east of the Cascades as
weak southerly flow aloft develops but bears watching. Buehner

&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Excessive Heat Warning from 2 PM Tuesday to 9 PM PDT Friday for
     Bellevue and Vicinity-Bremerton and Vicinity-East Puget
     Sound Lowlands-Everett and Vicinity-Hood Canal Area-Lower
     Chehalis Valley Area-Seattle and Vicinity-Southwest
     Interior-Tacoma Area.

     Fire Weather Watch from Wednesday afternoon through Thursday
     evening for Black Hills and Southwest Interior Lowlands-
     Central and South Puget Sound Lowlands-Southeast Puget
     Sound Lowlands Generally Below 1500 Feet.

     Red Flag Warning from 2 PM Tuesday to 11 PM PDT Thursday for
     West Slopes of the Central Cascades Generally above 1500
     Feet-West Slopes of the North Cascades Generally above 1500
     Feet.

PZ...Small Craft Advisory until 5 AM PDT Wednesday for Coastal Waters
     From Cape Flattery To James Island 10 To 60 Nm-Coastal
     Waters From James Island To Point Grenville 10 To 60 Nm-
     Coastal Waters From Point Grenville To Cape Shoalwater 10
     To 60 Nm.

     Small Craft Advisory until 5 AM PDT Tuesday for Coastal Waters
     From James Island To Point Grenville Out 10 Nm-Coastal
     Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

&&

www.weather.gov/seattle

You can see an illustrated version of this discussion at
www.wrh.noaa.gov/sew/gafd/latest_webafd.html

The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 2:36 AM PDTSmall Craft AdvisorySEW48 hr
Jul 31, 3:30 AM PDTExcessive Heat WarningSEW5 days
Jul 31, 3:00 PM PDTFire Weather WatchSEWGrays Harbor, Jefferson, King, Kitsap, Lewis, Mason and 2 more48 hr

Nearby

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

Sources

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