Fire Weather Watch
Status
Event Continued Active alertStart Time
Thu 01/09/2025 09:00 PM ESTEnd Time
Fri 01/10/2025 08:00 PM ESTSignificance
WatchImpacts
Moderate impact
Headline
Particularly dangerous situation (pds) red flag warning in
effect until 4 PM wednesday due to damaging north to northeast
winds and low humidities for the following areas: san gabriel
mountains/ san gabriel and san fernando valleys (especially
foothills)/ beverly and hollywood hills/ coastal areas adjacent to
sepulveda pass / santa monica mountains / santa susana mountains
/ malibu / eastern ventura valley (mainly near simi
valley/moorpark) -- this will likely be a life threatening,
destructive, and widespread windstorm...
red flag warnings in effect for los angeles county and much of
ventura county---see timings in headlines below...
red flag warning in effect for santa barbara mountains
including eastern santa ynez range into wednesday...
***this is a particularly dangerous situation (pds) for portions
of los angeles and ventura counties!***
a very strong, widespread, and destructive north to northeast
windstorm will bring extremely critical fire weather conditions
to many areas of los angeles and eastern ventura counties into
early wednesday afternoon. this is a particularly dangerous
situation (pds) red flag warning event in many areas, with the
combination of very strong upper level wind support, tightening
offshore pressure gradients (lax-daggett peaking at - 7 to -8 mb),
and moderate cold air advection. the strongest winds with this
event are expected to be this evening into early wednesday
afternoon when widespread damaging wind gusts of 50 to 80 mph are
likely. the san gabriel mountains, santa susana mountains, and
foothills of the san gabriel/san fernando valleys will likely see
areas of destructive wind gusts between 80 and 100 mph! due to the
very strong upper level wind support and high risk for strong
mountain wave activity, typical wind sheltered areas such as
portions of the la basin and san gabriel valley. the strong winds
will likely result in widespread downed trees/powerlines, as well
as widespread power outages. this will likely be the most
destructive windstorm seen since 2011 windstorm that did extensive
damage to pasadena and nearby foothills of the san gabriel
valley. any communities along highway 118 and 210 corridors will
be at highest risk for comparable wind damage. humidity levels are
also expected to lower to between 10 and 20 percent in many areas
by this evening, potentially lowering into single digits in some
areas by wednesday.
areas in a red flag warning (especially during the pds time
frame) will have increased risk for large fires with very rapid
fire spread, extreme fire behavior, and long range spotting. long
duration red flag warnings are in effect for much of los angeles
and ventura counties tuesday through thursday, with fire weather
watches in effect thursday night into friday. there is a shorter
duration of red flag conditions across the mountains of santa
barbara county into wednesday.
Full Alert Message
URGENT - FIRE WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 237 PM PST Tue Jan 7 2025 Particularly dangerous situation (pds) red flag warning in effect until 4 PM wednesday due to damaging north to northeast winds and low humidities for the following areas: san gabriel mountains/ san gabriel and san fernando valleys (especially foothills)/ beverly and hollywood hills/ coastal areas adjacent to sepulveda pass / santa monica mountains / santa susana mountains / malibu / eastern ventura valley (mainly near simi valley/moorpark) -- this will likely be a life threatening, destructive, and widespread windstorm... red flag warnings in effect for los angeles county and much of ventura county---see timings in headlines below... red flag warning in effect for santa barbara mountains including eastern santa ynez range into wednesday... ***this is a particularly dangerous situation (pds) for portions of los angeles and ventura counties!*** a very strong, widespread, and destructive north to northeast windstorm will bring extremely critical fire weather conditions to many areas of los angeles and eastern ventura counties into early wednesday afternoon. this is a particularly dangerous situation (pds) red flag warning event in many areas, with the combination of very strong upper level wind support, tightening offshore pressure gradients (lax-daggett peaking at - 7 to -8 mb), and moderate cold air advection. the strongest winds with this event are expected to be this evening into early wednesday afternoon when widespread damaging wind gusts of 50 to 80 mph are likely. the san gabriel mountains, santa susana mountains, and foothills of the san gabriel/san fernando valleys will likely see areas of destructive wind gusts between 80 and 100 mph! due to the very strong upper level wind support and high risk for strong mountain wave activity, typical wind sheltered areas such as portions of the la basin and san gabriel valley. the strong winds will likely result in widespread downed trees/powerlines, as well as widespread power outages. this will likely be the most destructive windstorm seen since 2011 windstorm that did extensive damage to pasadena and nearby foothills of the san gabriel valley. any communities along highway 118 and 210 corridors will be at highest risk for comparable wind damage. humidity levels are also expected to lower to between 10 and 20 percent in many areas by this evening, potentially lowering into single digits in some areas by wednesday. areas in a red flag warning (especially during the pds time frame) will have increased risk for large fires with very rapid fire spread, extreme fire behavior, and long range spotting. long duration red flag warnings are in effect for much of los angeles and ventura counties tuesday through thursday, with fire weather watches in effect thursday night into friday. there is a shorter duration of red flag conditions across the mountains of santa barbara county into wednesday. ...red flag warning remains in effect until 6 PM PST thursday for the following areas: san gabriel and san fernando valleys (especially foothills)/ beverly and hollywood hills/ coastal areas adjacent to sepulveda pass / santa monica mountains / malibu / eastern ventura valley (mainly near simi valley/moorpark) red flag warning in effect for all other times through 6 PM thursday in these same areas... ...fire weather watch remains in effect from thursday evening through friday afternoon for potential weak to moderate offshore winds and low relative humidity for much of los angeles and ventura counties... * winds, very strong/damaging north to northeast winds into wednesday, likely peaking in many areas between this afternoon and wednesday morning when there is a high risk for strong mountain wave wind activity. during this peak, sustained winds of 35 to 50 mph and widespread damaging gusts of 50 to 80 mph can be expected. strongest winds likely across the highways 118 and 210 corridors, including the foothills of the san gabriel/san fernando valleys, and simi valley where very powerful and destructive wind gusts of 80 to 100 mph will be likely. some particular location of greatest concern include sylmar, porter ranch, san fernando, burbank, glendale eastward to foothill communities such as la crescenta, altadena, monrovia, pasadena, azusa. and glendora. moderate north to northeast winds will likely persist thursday with gusts of 30 to 50 mph, with some weakening possible by friday. * relative humidity, falling to 10 to 20 percent by this evening afternoon/evening. humidities will potentially fall to single digits in some areas from wednesday into friday. * impacts, if fire ignition occurs, conditions are favorable for very rapid fire spread and extreme fire behavior, including long range spotting, which would threaten life and property. there will be a high risk for widespread downed trees and powerlines, as well as widespread power outages. precautionary/preparedness actions... a red flag warning means that critical fire weather conditions are either occurring now, or will shortly. use extreme caution with anything that can spark a wildfire. residents near wildland interfaces should be prepared to evacuate if a wildfire breaks out. see readyforwildfire.org and wildfirerisk.org for information. a fire weather watch means that critical fire weather conditions are likely to occur in the coming days. residents near wildland interfaces should prepare now on what to do if a wildfire breaks out. see readyforwildfire.org and wildfirerisk.org for information.
Technical Header
CAZ362-369-370-372>374-548-110100- /O.CON.KLOX.FW.W.0001.000000T0000Z-250110T0200Z/ /O.CON.KLOX.FW.A.0001.250110T0200Z-250111T0100Z/ Malibu Coast-Western Santa Monica Mountains Recreational Area- Eastern Santa Monica Mountains Recreational Area- Western San Fernando Valley-Eastern San Fernando Valley- Southeastern Ventura County Valleys- Los Angeles County San Gabriel Valley- 237 PM PST Tue Jan 7 2025