December 5, 2020 Fire Weather Watch - Los Angeles County San Gabriel Valley (California)
54.8 °F
Dew Pt.
24.0 °F
1024.5 hPa 
  rising slowly
0.0 mph 
0.00 in 
  0.00 in/hr
UV index
Solar rad.
100 W/m²

Today: Mostly sunny, with a high near 73. North northeast wind around 5 mph becoming southwest in the afternoon.
Mostly Sunny

Tonight: Partly cloudy, with a low around 49. Northeast wind around 5 mph becoming calm.
Partly Cloudy
Hi 73 °F Lo 49 °F

Current Watches, Warnings and Advisories for Los Angeles County San Gabriel Valley (CAZ548) California


Fire Weather Watch Fire Weather Watch - Los Angeles County San Gabriel Valley (California)

Updated:Sat 05-Dec-20 01:46am PST
Effective:Wed 31-Dec-69 04:00pm PST
Expires:Wed 31-Dec-69 04:00pm PST

Areas affected:
Instructions: A fire weather watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible red flag warnings.

Message summary: flag warning in effect until 10 pm this evening for the los angeles and ventura county mountains and the santa clarita valley due to gusty winds and low relative humidity... weather watch in effect from late sunday night through tuesday afternoon for wind and low relative humidity for all of los angeles and ventura counties except for the antelope valley...
.winds have diminished across the area, but it will remain gusty in the mountains and foothills, with isolated gusts up to 35 mph through today. The air mass will remain extremely dry with minimum humidities in the single digits to lower teens across most valleys and mountains during this time. Poor overnight recoveries of only 10-20 percent will be likely for windier areas of the fire district. Elevated to brief critical fire weather conditions will persist through sunday due to continued dry air and locally gusty offshore winds. Another santa ana wind event is expected to begin late sunday night and continue through at least tuesday. Northeast wind gusts will likely increase to near 60 mph, or possibly higher, by monday morning. There is some uncertainty in humidities, as an upper level system moving over the area at that time may bring slight increases in humidity at lower levels. However, drying conditions are expected through the day monday into tuesday with humidities again dropping to teens and single digits. weather watch remains in effect from late sunday night through tuesday afternoon for wind and low relative humidity for the ventura and san fernando valleys and the ventura coasts...
* winds and humidity...winds have diminished across the area this morning, however low humidities will continue. Northeast winds will increase late sunday night through tuesday to 20 to 30 mph with gusts to 50 mph.
* impacts...if fire ignition occurs, conditions will be favorable for rapid fire spread, long range spotting, and extreme fire behavior which would threaten life and property.
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Source: NWS Watches, Warnings or Advisories for zone CAZ548