Alert archive / California / Red Flag Warnings in 2021

Red Flag Warning 6, NWS Sacramento, CA

August 17, 2021

NWS Sacramento, CA issued this red flag warning at Aug 17, 2021, 3:00 AM PDT. It took effect at Aug 17, 2021, 1:00 PM PDT. It was in force for 55 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 17, 2021, 3:00 AM PDT (10:00 UTC)
In effect from
Aug 17, 2021, 1:00 PM PDT
Expired
Aug 19, 2021, 8:00 PM PDT
In force
55 hr
Issued by
NWS Sacramento, CA

The text

As transmitted.

630 
WWUS86 KSTO 171000
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
300 AM PDT Tue Aug 17 2021

...Red Flag Warning Tuesday evening and Wednesday for much of the
Sacramento Valley and surrounding foothill and mountain 
terrain due to breezy winds and low humidity...

.Gusty north to northeast winds will develop Tuesday evening 
across much of the Sacramento Valley and surrounding terrain and 
will continue through Wednesday. These winds, combined with low 
humidity and extremely dry fuels, will lead to critical fire 
weather conditions.

CAZ213>217-263-266-268-279-172300-
/O.UPG.KSTO.FW.A.0004.210818T0300Z-210819T0300Z/
/O.NEW.KSTO.FW.W.0006.210818T0000Z-210819T0300Z/
Eastern Portion of Shasta/Trinity NF-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-Eastern Mendocino NF-
300 AM PDT Tue Aug 17 2021

...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 PM
PDT WEDNESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONES 213, 214, 215, 216, 217, 263, 266, 268, AND 279...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect from 5 PM this afternoon to 8 PM PDT
Wednesday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Fire weather zone 213, 214, 215, 216, 217, 263,
  266, 268, and 279.

* WIND...North to northeast wind gusts of 25 to 35 mph will
  develop Tuesday night and continue Wednesday. Strongest winds
  are expected along the western side of the Sacramento Valley 
  and near favorably oriented canyons across the foothills and 
  mountains. 

* HUMIDITY...Minimum humidity of 9 to 15 percent expected 
  Wednesday.

* 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

CAZ267-269-172300-
/O.NEW.KSTO.FW.W.0006.210818T0000Z-210819T0300Z/
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-
300 AM PDT Tue Aug 17 2021

...RED FLAG WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 8 PM
PDT WEDNESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONES 267 AND 269...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect from 5 PM this afternoon to 8 PM PDT
Wednesday. 

* AFFECTED AREA...Fire weather zone 267 and 269.

* WIND...North to northeast wind gusts of 25 to 35 mph will
  develop Tuesday night and continue Wednesday. Strongest winds
  are expected along the western side of the Sacramento Valley 
  and near favorably oriented canyons across the foothills and 
  mountains. 

* HUMIDITY...Minimum humidity of 10 to 15 percent expected
  Wednesday.

* 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
6 follow-up statements
653 
WWUS86 KSTO 171730
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
1030 AM PDT Tue Aug 17 2021

...Red Flag Warning Tuesday Afternoon through Wednesday due to 
Breezy Winds and Low Humidity...

.Locally breezy south to southwest winds expected Tuesday 
afternoon, especially along the western slopes of the Sierra 
Nevada. Then winds will shift to the north to northeast and
increase Tuesday evening across much of the Sacramento Valley, 
surrounding terrain, and western slopes of the Sierra Nevada and 
will continue through Wednesday. These winds, combined with low 
humidity and extremely dry fuels, will lead to critical fire 
weather conditions.

CAZ221-181600-
/O.EXB.KSTO.FW.W.0006.210817T2000Z-210819T0300Z/
Stanislaus NF West of the Sierra Crest-
1030 AM PDT Tue Aug 17 2021

...RED FLAG WARNING IN EFFECT UNTIL 8 PM PDT WEDNESDAY FOR GUSTY 
WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 221...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect until 8 PM PDT Wednesday. 

* AFFECTED AREA...The west slope of the Sierra Nevada. Includes fire
  weather zone 221.

* WIND... West to southwest wind gusts up to 25 to 35 mph Tuesday,
  shifting to east to northeast winds Tuesday night and continuing
  Wednesday. Strongest winds are expected over high elevations and
  near favorably oriented canyons.

* HUMIDITY...Minimum humidity of 10 to 25 percent expected with 
  moderate to poor overnight recoveries.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

CAZ213>217-263-266>269-279-181600-
/O.EXT.KSTO.FW.W.0006.210817T2000Z-210819T0300Z/
Eastern Portion of Shasta/Trinity NF-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-Eastern Mendocino NF-
1030 AM PDT Tue Aug 17 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM PDT WEDNESDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213, 214, 
215, 216, 217, 263, 266, 267, 268, 269, AND 279...

* AFFECTED AREA...Much of the Sacramento Valley and surrounding
  foothill and mountain terrain. Includes fire weather zones 213,
  214, 215, 216, 217, 263, 266, 267, 268, 269, and 279.

* WIND...South to southwest winds Tuesday. North to northeast wind
  gusts of 25 to 35 mph will develop Tuesday night and continue
  Wednesday. Strongest winds are expected along the western side
  of the Sacramento Valley and near high elevations and favorably
  oriented canyons across the foothills and mountains.

* HUMIDITY...Minimum humidity of 9 to 15 percent with moderate to
  locally poor overnight recoveries.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
877 
WWUS86 KSTO 181052
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
352 AM PDT Wed Aug 18 2021

...Red Flag Warning through Late Today due to Gusty Winds and Low
Humidity...

.Gusty north winds increase today across much of the Sacramento 
Valley and surrounding terrain. These winds, combined with low 
humidity and extremely dry fuels, will bring critical fire 
weather conditions.

CAZ213>217-221-263-266>269-279-190300-
/O.CON.KSTO.FW.W.0006.000000T0000Z-210819T0300Z/
Eastern Portion of Shasta/Trinity NF-
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Stanislaus NF West of the Sierra Crest-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-Eastern Mendocino NF-
352 AM PDT Wed Aug 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213, 214,
215, 216, 217, 221, 263, 266, 267, 268, 269, AND 279...

* AFFECTED AREA...Much of the Sacramento Valley and surrounding
  foothill and mountain terrain. Includes fire weather zones 213,
  214, 215, 216, 217, 221, 263, 266, 267, 268, 269, and 279.

* WIND...North to northeast wind gusts of 25 to 40 mph. Strongest
  winds are expected along the western side of the Sacramento 
  Valley and near high elevations and favorably oriented canyons 
  across the foothills and mountains.

* HUMIDITY...Minimum humidity of 9 to 15 percent.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
982 
WWUS86 KSTO 181704
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
1004 AM PDT Wed Aug 18 2021

...Red Flag Warning through Thursday due to Gusty Winds and Low 
Humidity...

.Gusty north to east winds continue today through tomorrow across
much of the Sacramento Valley and surrounding terrain. Strongest 
Valley winds will be today. Valley winds will lessen some
overnight then increase again tomorrow, though will not be as 
strong as today. Winds are forecast to increase over the western 
Sierra slopes overnight tonight before decreasing tomorrow 
morning. These gusty winds, combined with low humidity and 
extremely dry fuels, will bring critical fire weather conditions.

CAZ214-221-267>269-191600-
/O.EXT.KSTO.FW.W.0006.000000T0000Z-210819T1800Z/
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Stanislaus NF West of the Sierra Crest-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-
1004 AM PDT Wed Aug 18 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 11 AM PDT THURSDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 214, 221, 
267, 268, AND 269...

* AFFECTED AREA...Western slopes of the Sierra Nevada, western
  Plumas County, and Burney Basin, including fire weather zones
  214, 221, 267, 268,and 269.

* WIND...North to northeast wind gusts of 25 to 35 mph, locally
  higher in favored gaps and canyons. Strongest winds are expected
  over higher elevations and favorably oriented gaps and canyons.

* HUMIDITY...Minimum humidity of 10 to 25 percent with moderate to
  poor overnight recoveries.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

CAZ213-215>217-263-266-279-191600-
/O.EXT.KSTO.FW.W.0006.000000T0000Z-210820T0300Z/
Eastern Portion of Shasta/Trinity NF-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-Eastern Mendocino NF-
1004 AM PDT Wed Aug 18 2021

...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM PDT THURSDAY FOR
GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213, 215, 
216, 217, 263, 266, AND 279...

* AFFECTED AREA...Much of the Sacramento Valley and surrounding
  foothill and mountain terrain, including fire weather zones 213,
  215, 216, 217, 263, 266, and 279.

* WIND...North to northeast wind gusts of 25 to 40 mph today, 20
  to 30 mph on Thursday. Strongest winds are expected along the 
  western side of the Sacramento Valley and near high elevations 
  and favorably oriented canyons across the foothills and 
  mountains.

* HUMIDITY...Minimum humidity of 9 to 15 percent with moderate to
  poor overnight recoveries.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
417 
WWUS86 KSTO 190849
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
149 AM PDT Thu Aug 19 2021

...Red Flag Warning through this Evening due to Gusty Winds and 
Low Humidity...

.Gusty north to east winds continue today across much of the 
Sacramento Valley and the surrounding terrain. Gusty winds over 
the western Sierra slopes continue through late morning before 
decreasing. Valley winds stay breezy through this evening,
although winds are expected to be less strong than those
experienced yesterday. These gusty winds, combined with low 
humidity and extremely dry fuels, will bring critical fire weather
conditions.

CAZ214-221-267>269-191800-
/O.CON.KSTO.FW.W.0006.000000T0000Z-210819T1800Z/
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Stanislaus NF West of the Sierra Crest-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-
149 AM PDT Thu Aug 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 AM PDT THIS
MORNING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
214, 221, 267, 268, AND 269...

* AFFECTED AREA...Western slopes of the Sierra Nevada, western
  Plumas County, and Burney Basin, including fire weather zones
  214, 221, 267, 268,and 269.

* WIND...North to northeast wind gusts of 25 to 35 mph, locally 
  higher in favored gaps and canyons. Strongest winds are 
  expected over higher elevations and favorably oriented gaps 
  and canyons. 

* HUMIDITY...Minimum humidity of 15 to 25 percent.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

CAZ213-215>217-263-266-279-192300-
/O.CON.KSTO.FW.W.0006.000000T0000Z-210820T0300Z/
Eastern Portion of Shasta/Trinity NF-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-Eastern Mendocino NF-
149 AM PDT Thu Aug 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213, 215,
216, 217, 263, 266, AND 279...

* AFFECTED AREA...Much of the Sacramento Valley and surrounding
  foothill and mountain terrain, including fire weather zones 213,
  215, 216, 217, 263, 266, and 279.

* WIND...North to northeast wind gusts of 20 to 30 mph today. 
  Strongest winds are expected along the western side of the 
  Sacramento Valley and near high elevations and favorably 
  oriented canyons across the foothills and mountains.

* HUMIDITY...Minimum humidity of 10 to 20 percent.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
714 
WWUS86 KSTO 191758
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
1058 AM PDT Thu Aug 19 2021

...Red Flag Warning through this Evening due to Gusty Winds and
Low Humidity...

.Gusty north to east winds continue today across much of the
Sacramento Valley and the surrounding terrain through this 
evening, although winds are expected to be less strong than those 
experienced yesterday. These gusty winds, combined with low 
humidity and extremely dry fuels, will bring critical fire weather
conditions.

CAZ214-221-267>269-191900-
/O.EXP.KSTO.FW.W.0006.000000T0000Z-210819T1800Z/
Burney Basin and Northeast Plateau in Shasta County Including
Northwest Lassen NF north of Lassen NP-
Stanislaus NF West of the Sierra Crest-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
Northern Sierra Including Lassen NP and Plumas and Lassen NF/S
West of the Sierra Crest (West of Evans Peak-Grizzly Peak-
Beckworth Peak)-
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-
1058 AM PDT Thu Aug 19 2021

...RED FLAG WARNING WILL EXPIRE AT 11 AM PDT THIS MORNING FOR
GUSTY WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 214, 221, 267,
268, AND 269...

Winds have subsided this morning, so the Red Flag Warning will be
allowed to expire for the western slopes of the Sierra Nevada, 
western Plumas County, and Burney Basin. However, locally gusty 
winds are possible in favored gaps and canyons through tonight, 
and daytime humidities will remain low with poor to moderate
overnight recoveries.

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

CAZ213-215>217-263-266-279-200300-
/O.CON.KSTO.FW.W.0006.000000T0000Z-210820T0300Z/
Eastern Portion of Shasta/Trinity NF-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-Eastern Mendocino NF-
1058 AM PDT Thu Aug 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 213, 215,
216, 217, 263, 266, AND 279...

* AFFECTED AREA...Much of the Sacramento Valley and surrounding
  foothill and mountain terrain, including fire weather zones 213,
  215, 216, 217, 263, 266, and 279.

* WIND...North to northeast wind gusts of 20 to 30 mph today. 
  Strongest winds are expected along the western side of the 
  Sacramento Valley and near high elevations and favorably 
  oriented canyons across the foothills and mountains.

* HUMIDITY...Minimum humidity of 10 to 20 percent.

* IMPACTS...Any active fires or new 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 can
contribute to extreme fire behavior.

&&

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$
022 
WWUS86 KSTO 200311
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
811 PM PDT Thu Aug 19 2021

CAZ213-215>217-263-266-279-200415-
/O.EXP.KSTO.FW.W.0006.000000T0000Z-210820T0300Z/
Eastern Portion of Shasta/Trinity NF-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-
Central Sacramento Valley in Glenn, Colusa, Yuba, Northern
Sutter, and Butte County Below 1000 Ft-
Southern Sacramento Valley in Yolo-
Sacramento Far Western Placer, southern Sutter and Solano County
Below 1000 Ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions
of Shasta-Trinity and Butte Units-Eastern Mendocino NF-
811 PM PDT Thu Aug 19 2021

...RED FLAG WARNING HAS EXPIRED FOR GUSTY WINDS AND LOW HUMIDITY
FOR FIRE WEATHER ZONES 213, 215, 216, 217, 263, 266, AND 279...

Gusty winds have diminished over the warning area. Gradual improvement
in humidity is expected. 

Interact with us via social media
www.facebook.com/nws.sacramento
www.twitter.com/nwssacramento

$$

Nearby

Red Flag Warnings in California, 2021Every red flag warning in 2021

Sources

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