Alert archive / California / Red Flag Warnings in 2017

Red Flag Warning 1, NWS San Francisco Bay Area, CA

July 7, 2017

NWS San Francisco Bay Area, CA issued this red flag warning at Jul 7, 2017, 9:11 PM PDT. It was in force for 30 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
Jul 7, 2017, 9:11 PM PDT (04:11 UTC)
Expired
Jul 9, 2017, 3:35 AM PDT
In force
30 hr
Issued by
NWS San Francisco Bay Area, CA

The text

As transmitted.

979 
WWUS86 KMTR 080411
RFWMTR

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
911 PM PDT Fri Jul 7 2017

...Breezy and very dry conditions in the East Bay Hills and the 
Diablo Range through Saturday evening...

.Strong high pressure remains over the region and will result in 
very dry and warm conditions tonight and then hot and dry 
conditions on Saturday. Breezy and locally gusty west to northwest
winds tonight will gradually diminish on Saturday.

CAZ511-081300-
/O.NEW.KMTR.FW.W.0001.170708T0411Z-170709T0400Z/
East Bay Hills and the Diablo Range-
911 PM PDT Fri Jul 7 2017

...RED FLAG WARNING IN EFFECT UNTIL 9 PM PDT SATURDAY FOR BREEZY
WEST TO NORTHWEST WINDS AND VERY DRY CONDITIONS FOR FIRE WEATHER 
ZONE 511...

The National Weather Service in San Francisco has issued a Red
Flag Warning, which is in effect until 9 PM PDT Saturday. 

* AFFECTED AREA...Fire weather zone 511...The East Bay Hills and
  the Diablo Range.

* WIND...West to Northwest winds 10 to 20 mph with gusts to 25 mph
  tonight, gradually decreasing on Saturday.

* HUMIDITY...Relative humidity values of 15 to 30% tonight,
  dropping as low as the upper single digits Saturday afternoon.

* 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.

&&

$$
BLIER
3 follow-up statements
250 
WWUS86 KMTR 081121
RFWMTR

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
421 AM PDT Sat Jul 8 2017

...Breezy and very dry conditions in the East Bay Hills and the
Diablo Range through this evening...

.Strong high pressure remains over the region and will result in
very dry and very warm to hot conditions this afternoon and
evening. Breezy and locally gusty west to northwest winds will 
combine with the hot and dry conditions resulting in increased 
fire danger across the East Bay Hills and the Diablo Range 
through this evening. Winds are then forecast to diminish late in 
the day.

CAZ511-082200-
/O.CON.KMTR.FW.W.0001.000000T0000Z-170709T0400Z/
East Bay Hills and the Diablo Range-
421 AM PDT Sat Jul 8 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR BREEZY WEST TO NORTHWEST WINDS AND VERY DRY CONDITIONS FOR
FIRE WEATHER ZONE 511...

* AFFECTED AREA...Fire weather zone 511...The East Bay Hills and 
  the Diablo Range. 

* WIND...West to Northwest winds 10 to 20 mph with gusts to 25 mph
  tonight, gradually decreasing late this evening. 

* HUMIDITY...Relative humidity values dropping as low as the upper
  single digits this afternoon.

* 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.

&&

$$
466 
WWUS86 KMTR 090350
RFWMTR

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
850 PM PDT Sat Jul 8 2017

...Breezy and very dry conditions in the East Bay Hills and the
Diablo Range will continue through Saturday night...

.Breezy and locally gusty west to northwest winds will combine 
with dry conditions resulting in continued high fire danger 
across the East Bay Hills and the Diablo Range tonight. Winds are
then forecast to diminish and humidities improve by Sunday morning.

CAZ511-091200-
/O.EXT.KMTR.FW.W.0001.000000T0000Z-170709T1200Z/
East Bay Hills and the Diablo Range-
850 PM PDT Sat Jul 8 2017

...RED FLAG WARNING NOW IN EFFECT UNTIL 5 AM PDT SUNDAY FOR
BREEZY WEST TO NORTHWEST WINDS AND VERY DRY CONDITIONS FOR FIRE
WEATHER ZONE 511...

* AFFECTED AREA...Fire weather zone 511...The East Bay Hills and 
  the Diablo Range. 

* WIND...West to Northwest winds 10 to 20 mph with local gusts to
  30 mph gradually decreasing overnight. 

* HUMIDITY...Relative humidity values of 15 to 30% this
  evening....increasing to 25 to 45% overnight. 

* 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.

&&

$$
247 
WWUS86 KMTR 091035
RFWMTR

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
335 AM PDT Sun Jul 9 2017

CAZ511-091145-
/O.CAN.KMTR.FW.W.0001.000000T0000Z-170709T1200Z/
East Bay Hills and the Diablo Range-
335 AM PDT Sun Jul 9 2017

...RED FLAG WARNING IS CANCELLED FOR BREEZY WEST TO NORTHWEST
WINDS AND VERY DRY CONDITIONS FOR FIRE WEATHER ZONE 511...

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

Winds have diminished over the region and relative humidity values
have improved in response to a deeper marine push. Thus, the Red
Flag Warning has been cancelled for the East Bay Hills and the
Diablo Range.

$$

The office that day

Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 5:52 PM PDTHeat AdvisoryMTRAlameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more27 hr
Jul 8, 2:26 PM PDTSmall Craft AdvisoryMTR31 hr

Nearby

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

Sources

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