Alert archive / California / Red Flag Warnings in 2021

Red Flag Warning 13, NWS Sacramento, CA

October 10, 2021

NWS Sacramento, CA issued this red flag warning at Oct 10, 2021, 3:15 AM PDT. It took effect at Oct 10, 2021, 11:00 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
Oct 10, 2021, 3:15 AM PDT (10:15 UTC)
In effect from
Oct 10, 2021, 11:00 PM PDT
Expired
Oct 12, 2021, 7:00 PM PDT
In force
44 hr
Issued by
NWS Sacramento, CA

The text

As transmitted.

011 
WWUS86 KSTO 101015
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
315 AM PDT Sun Oct 10 2021

...Red Flag Warning late this evening into Tuesday evening for 
the Central Valley, Coast Range, and the foothill and lower 
elevations of the southern Cascades...and Monday afternoon into 
Tuesday evening across the northern Sierra foothills...

.Gusty north to northeast winds will develop late tonight and 
continue through Tuesday across much of interior Northern 
California. The strongest, most impactful, winds are expected on 
Monday across the Central Valley and foothills of the Coast Range.
These winds combined with low humidity and dry fuels will lead to
critical fire weather conditions into Tuesday evening.

CAZ269-101115-
/O.CAN.KSTO.FW.A.0009.211011T1800Z-211013T0200Z/
Northern Sierra Including the Tahoe and ElDorado NF/S West of the
Sierra Crest-
315 AM PDT Sun Oct 10 2021

...FIRE WEATHER WATCH IS CANCELLED FOR FIRE WEATHER ZONE 269...

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

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

$$

CAZ266-268-102300-
/O.UPG.KSTO.FW.A.0009.211011T1800Z-211013T0200Z/
/O.NEW.KSTO.FW.W.0013.211011T0600Z-211013T0200Z/
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)-
315 AM PDT Sun Oct 10 2021

...RED FLAG WARNING IN EFFECT FROM 11 PM THIS EVENING TO 7 PM PDT
TUESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
266 AND 268...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect from 11 PM this evening to 7 PM PDT
Tuesday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Foothills and lower elevations of the southern
  Cascades.

* WIND...North to northeast wind gusts of 30 to 40 mph, locally
  higher near favored gaps and canyons. Strong winds will develop
  late this evening.

* HUMIDITY...Minimum humidity 15 to 25 percent Monday, slightly
  lower on Tuesday. Overnight recovery 25 to 50 percent.

* 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

$$

CAZ215>219-263-279-102300-
/O.UPG.KSTO.FW.A.0009.211011T0600Z-211013T0200Z/
/O.NEW.KSTO.FW.W.0013.211011T0600Z-211013T0200Z/
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-Carquinez Strait and Delta-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-Southeast Edge Shasta-
Trinity NF and Western Portions of Tehama-Glenn Unit-
Eastern Mendocino NF-
315 AM PDT Sun Oct 10 2021

...RED FLAG WARNING IN EFFECT FROM 11 PM THIS EVENING TO 7 PM PDT
TUESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
215, 216, 217, 218, 219, 263, AND 279...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect from 11 PM this evening to 7 PM PDT
Tuesday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Central Valley and Coast Range.

* WIND...North wind gusts of 30 to 50 mph, locally higher. Strong
  winds will develop over the Sacramento Valley and Coast Range
  late this evening and spread south by early Monday.

* HUMIDITY...Minimum humidity 15 to 25 percent Monday, 8 to 15
  percent on Tuesday. Overnight recovery 25 to 50 percent.

* 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

$$

CAZ220-267-102300-
/O.UPG.KSTO.FW.A.0009.211011T1800Z-211013T0200Z/
/O.NEW.KSTO.FW.W.0013.211011T1800Z-211013T0200Z/
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
315 AM PDT Sun Oct 10 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM MONDAY TO 7 PM PDT
TUESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 
220 AND 267...

The National Weather Service in Sacramento has issued a Red Flag
Warning, which is in effect from 11 AM Monday to 7 PM PDT
Tuesday. The Fire Weather Watch is no longer in effect. 

* AFFECTED AREA...Foothills of the northern Sierra Nevada.

* WIND...North to northeast wind gusts of 30 to 40 mph, locally
  higher near favored gaps and canyons. Strong winds will develop
  Monday and continue Tuesday. 

* HUMIDITY...Minimum humidity 15 to 20 percent. Overnight recovery 
  30 to 45 percent.

* 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
122 
WWUS86 KSTO 102130
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
230 PM PDT Sun Oct 10 2021

...Red Flag Warning late this evening into Tuesday evening for
the Valley, Coast Range, and the foothills and lower elevations 
of the southern Cascades...and Monday afternoon into Tuesday 
evening across the northern Sierra foothills...

.Gusty north to northeast winds will develop late tonight and
continue through Tuesday across much of interior Northern
California. The strongest, most impactful, winds are expected on
Monday across the Valley and foothills of the Coast Range. These 
winds combined with low humidity and dry fuels will lead to 
critical fire weather conditions into Tuesday evening.

CAZ215>219-263-266-268-279-111600-
/O.CON.KSTO.FW.W.0013.211011T0600Z-211013T0200Z/
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-Carquinez Strait and Delta-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties 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-
230 PM PDT Sun Oct 10 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO
7 PM PDT TUESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE 
WEATHER ZONES 215, 216, 217, 218, 219, 263, 266, 268, AND 279...

* AFFECTED AREA...Portions of the Delta Region, Sacramento Valley,
  northern San Joaquin Valley, the Coastal Range, and foothills of
  the western slopes of the Southern Cascades, including portions
  of fire weather zones 215, 216, 217, 218, 219, 263, 266, 268,
  and 279.
 
* WIND...North to northeast wind gusts of 30 to 45 mph, locally
  higher near favored gaps and canyons and in the Valley. Strong 
  winds will develop late this evening.

* HUMIDITY...Minimum humidity 10 to 25 percent Monday, slightly 
  lower on Tuesday. Overnight recovery 25 to 50 percent.

* 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

$$

CAZ220-267-111600-
/O.CON.KSTO.FW.W.0013.211011T1800Z-211013T0200Z/
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
230 PM PDT Sun Oct 10 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM MONDAY TO 7 PM
PDT TUESDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER 
ZONES 220 AND 267...

* AFFECTED AREA...Foothills of the western slopes of the northern
  Sierra Nevada, including fire weather zones 220 and 267.

* WIND...North to northeast wind gusts of 25 to 40 mph, locally 
  higher near favored gaps and canyons. Strong winds will develop 
  Monday and continue Tuesday.

* HUMIDITY...Minimum humidity 15 to 20 percent. Overnight
  recovery 30 to 45 percent. 

* 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

$$
100 
WWUS86 KSTO 111030
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
330 AM PDT Mon Oct 11 2021

...Red Flag Warning into Tuesday For Gusty Wind and Low
Humidity... 

.Gusty north to northeast wind across portions of interior
Northern California, combined with low humidity and dry fuels will
result in critical fire weather conditions through Tuesday 
evening. Strongest, most impactful, wind expected today across the
Central Valley and foothills of the Coastal Range. 

CAZ215>219-263-266-268-279-112300-
/O.CON.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
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-Carquinez Strait and Delta-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties 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-
330 AM PDT Mon Oct 11 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT TUESDAY FOR
GUSTY WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 215, 216, 217,
218, 219, 263, 266, 268, AND 279...

* AFFECTED AREA...Fire weather zone 215, 216, 217, 218, 219, 263,
  266, 268, and 279. 

* WIND...North to northeast wind 15 to 30 mph with gusts up to 45
  mph, locally higher near favored gaps and canyons and in portions
  of the Central Valley.

* HUMIDITY...Minimum daytime humidities 10 to 22 percent, 
  slightly lower on Tuesday. Overnight recoveries 25 to 50 
  percent.

* 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

$$

CAZ220-267-112300-
/O.CON.KSTO.FW.W.0013.211011T1800Z-211013T0200Z/
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-
Northern Motherlode From 1000 to 3000 Ft. Includes portions of
Nevada-Yuba-Placer-Amador and ElDorado Units-
330 AM PDT Mon Oct 11 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
7 PM PDT TUESDAY FOR GUSTY WIND FOR FIRE WEATHER ZONES 220 AND 
267...

* AFFECTED AREA...Fire weather zones 220 and 267.

* WIND...North to northeast wind 10 to 20 mph with gusts up to 35
  mph, locally higher near favored gaps and canyons. 

* HUMIDITY...Minimum daytime humidity 12 to 25 percent. Overnight
  recoveries 30 to 50 percent.

* 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

$$
800 
WWUS86 KSTO 112109
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
209 PM PDT Mon Oct 11 2021

...Red Flag Warning into Tuesday For Gusty Wind and Low
Humidity...

.Gusty north to northeast wind across portions of interior
Northern California, combined with low humidity and dry fuels,
will result in critical fire weather conditions through Tuesday
evening. Strongest, most impactful, wind expected today across
the Central Valley and foothills of the Coastal Range.

CAZ215>220-263-266>268-279-121600-
/O.CON.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
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-Carquinez Strait and Delta-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-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)-Eastern Mendocino NF-
209 PM PDT Mon Oct 11 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT TUESDAY FOR
GUSTY WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 215, 216, 217,
218, 219, 220, 263, 266, 267, 268, AND 279...

* AFFECTED AREA...Portions of the Delta Region, Sacramento Valley,
  northern San Joaquin Valley, the Coastal Range, and foothills of
  the western slopes of the Northern Sierra, including fire 
  weather zones 215, 216, 217, 218, 219, 220, 263, 266, 267, 268, 
  and 279. 

* WIND...North to northeast wind 15 to 30 mph with gusts up to
  45 mph, locally higher near favored gaps and canyons and in 
  portions of the Central Valley. 

* HUMIDITY...Minimum daytime humidities 10 to 22 percent, 
  slightly lower on Tuesday. Overnight recoveries 25 to 50 
  percent.

* 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

$$
575 
WWUS86 KSTO 121030
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
330 AM PDT Tue Oct 12 2021

...Red Flag Warning Continues Today For Gusty Wind and Low 
Humidity...

.Gusty north to northeast wind across portions of interior
Northern California, combined with low humidity and dry fuels,
will maintain areas of critical fire weather conditions today 
into early evening. Gusty wind possible again Thursday into early 
Friday.

CAZ215>220-263-266>268-279-130200-
/O.CON.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
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-Carquinez Strait and Delta-
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-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)-Eastern Mendocino NF-
330 AM PDT Tue Oct 12 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING
FOR GUSTY WIND AND LOW HUMIDITY FOR FIRE WEATHER ZONES 215, 216, 
217, 218, 219, 220, 263, 266, 267, 268, AND 279...

* AFFECTED AREA...Fire weather zone 215, 216, 217, 218, 219, 220,
  263, 266, 267, 268, and 279. 

* WIND...North to northeast wind 10 to 20 mph with gusts up to 35
  mph, locally stronger wind near favored gaps and canyons and in
  portions of the Central Valley.

* HUMIDITY...Minimum daytime humidities 6 to 21 percent today.

* 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

$$
582 
WWUS86 KSTO 122128
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
228 PM PDT Tue Oct 12 2021

...Red Flag Warning continues through this evening...

...New Red Flag Warning on Thursday for Gusty Winds and Low
Humidity for the western Sacramento Valley...

.Critical fire weather conditions will continue into the evening
hours as a result of gusty northerly winds and low relative
humidity values. Winds will subside tonight along with some 
improved humidity recoveries. By Wednesday night and into 
Thursday, a renewed period of gusty northerly winds will return, 
primarily impacting the western Sacramento Valley. As humidity 
values decrease on Thursday afternoon, critical fire weather 
conditions will redevelop.

CAZ215>218-279-130200-
/O.NEW.KSTO.FW.W.0014.211014T1700Z-211015T0300Z/
/O.CON.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
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-Carquinez Strait and Delta-Eastern Mendocino NF-
228 PM PDT Tue Oct 12 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 215, 216,
217, 218, AND 279... 

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM PDT THURSDAY FOR
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 215, 216,
217, 218, AND 279...

The National Weather Service in Sacramento has issued a new Red 
Flag Warning, which is in effect from 10 AM to 8 PM PDT Thursday.
The current Red Flag Warning remains in effect through 7 PM PDT 
this evening.

* AFFECTED AREA...The western Sacramento Valley, including the
  Delta. Fire weather zones 215, 216, 217, 218, and 279.

* WIND...For the first Red Flag Warning, north to northeast winds
  15 to 25 mph with gusts 30 to 40 mph through the late afternoon
  and early evening. For the second Red Flag Warning, north to 
  northeast winds 10 to 20 mph with gusts 25 to 35 mph, locally 
  higher. 

* HUMIDITY...For this afternoon and early evening, minimum 
  daytime humidities 6 to 16 percent. For Thursday, minimum 
  daytime humidities 10 to 20 percent.

* 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

$$

CAZ219-220-263-266>268-130200-
/O.CON.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-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)-
228 PM PDT Tue Oct 12 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 219, 220,
263, 266, 267, AND 268...

* AFFECTED AREA...The western slopes of the Sierra Nevada and
  adjacent foothills, as well parts of the Sacramento and northern
  San Joaquin Valleys. Fire weather zones 219, 220, 263, 266, 267,
  and 268.

* WIND...North to northeast wind 10 to 20 mph with gusts up to 35
  mph, locally stronger wind near favored gaps and canyons.

* HUMIDITY...Minimum daytime humidities 6 to 21 percent this
  afternoon and early evening.

* 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

$$
071 
WWUS86 KSTO 130209
RFWSTO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
709 PM PDT Tue Oct 12 2021

...Red Flag Warning on Thursday for Gusty Winds and Low Humidity 
for the Western Sacramento Valley...

.By Wednesday night and into Thursday, a renewed period of gusty 
northerly winds will return, primarily impacting the western 
Sacramento Valley. As humidity values decrease on Thursday 
afternoon, critical fire weather conditions will redevelop.

CAZ215>218-279-131400-
/O.EXP.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
/O.CON.KSTO.FW.W.0014.211014T1700Z-211015T0300Z/
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-Carquinez Strait and Delta-Eastern Mendocino NF-
709 PM PDT Tue Oct 12 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
THURSDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES
215, 216, 217, 218, AND 279...

* AFFECTED AREA...The western Sacramento Valley, including the 
  Delta. Fire weather zones 215, 216, 217, 218, and 279. 

* WIND...North to northeast winds 10 to 20 mph with gusts 25 to 
  35 mph, locally higher.

* HUMIDITY...Minimum daytime humidities 10 to 20 percent.

* 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

$$

CAZ219-220-263-266>268-130315-
/O.EXP.KSTO.FW.W.0013.000000T0000Z-211013T0200Z/
Northern San Joaquin Valley in San Joaquin and Stanislaus
Counties Below 1000 ft-
Southern Motherlode From 1000 to 3000 Ft. Includes portions of
Calaveras-Tuolumne Unit-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)-
709 PM PDT Tue Oct 12 2021

...RED FLAG WARNING HAS EXPIRED FOR GUSTY WINDS AND LOW HUMIDITY
FOR FIRE WEATHER ZONES 219, 220, 263, 266, 267, AND 268...

Winds continue to decrease this evening and we are no longer
seeing widespread Red Flag conditions. 

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$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 10, 2:57 AM PDTWind AdvisorySTO44 hr

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.