weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

One product issued by NWS for: 4 Miles SSW Lamorinda CA
Share |


Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
327 AM PDT Fri Sep 25 2020

CAZ511-252230-
/O.UPG.KMTR.FW.A.0004.200926T1800Z-200928T1500Z/
/O.NEW.KMTR.FW.W.0005.200927T0400Z-200928T1500Z/
East Bay Hills and the Diablo Range-
327 AM PDT Fri Sep 25 2020

...RED FLAG WARNING IN EFFECT FROM 9 PM SATURDAY TO 8 AM PDT
MONDAY FOR OFFSHORE WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE
511...

The National Weather Service in San Francisco has issued a Red
Flag Warning...which is in effect from 9 PM Saturday to 8 AM PDT
Monday. The Fire Weather Watch is no longer in effect.

* WIND...Northeast winds 10 to 20 mph on Saturday will increase
  Saturday night into Sunday morning with gusts 40 to 50 mph.
  Winds will ease during the day Sunday but then another burst of
  winds will develop Sunday night into Monday. These winds will be
  from the East as pure offshore flow develops.

* HUMIDITY...30-45% Saturday night but lowering to around 30% by
  sunrise Sunday. RH values staying steady from 15-25% Sunday into
  early Monday with no humidity recovery Sunday night.

* HIGHEST THREAT...Mount Diablo and the East Bay Hills above 1000
  feet including much of the East Bay Regional Park District lands.

* IMPACTS....Any fires that develop will spread rapidly in the
  hot, dry and windy weather.

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.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE