‘Extreme episode of fire weather’ predicted for L.A. area with 100-mph gusts and ‘bone dry’ air

 
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PostPosted: Mon Jan 20, 2025 1:11 am    Post subject: ‘Extreme episode of fire weather’ predicted for L.A. area with 100-mph gusts and ‘bone dry’ air

Godspeed everyone.

https://www.sfchronicle.com/weather/article/la-santa-ana-winds-20044072.php

Quote:
Red flag warnings for critical fire weather conditions have been issued for roughly 12.8 million Southern Californians. The most dangerous conditions are expected in the San Gabriel, Santa Monica and Santa Susana mountains and along Interstate 210 from Altadena through the northern San Fernando Valley, including Oxnard, Malibu, Santa Clarita, Palmdale, Thousand Oaks, Simi Valley and Burbank.

Gusts of 60 to 100 mph in the mountains and foothills and 50 to 70 mph in the valleys will be “supportive of rapid wildfire onset and spread,” according to the National Weather Service. The strongest winds will occur between midday Monday and early Tuesday morning.

“There is going to be a powerful damaging wind event, bringing particularly dangerous red flag conditions,” said Ariel Cohen, meteorologist in charge at the weather service office in Oxnard (Ventura County). “Everyone needs to take the time over the next day to get prepared for this. I know a lot of people have a lot of fatigue from all of the extreme fire weather we’ve had, but now is not the time to let your guard down. You need to be ready for another extreme episode of fire weather.”

Cohen urged residents to charge their cellphones and have multiple ways of receiving evacuation notifications. He reminded people to park cars away from trees and stay indoors away from windows.

“This is not the time to be taking this weather lightly at all,” Cohen said. “We’re on the cusp of another extreme event.”


https://www.spc.noaa.gov/
Extremely Critical Fire Weather Conditions Today
...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL MOUNTAINS WEST TOWARDS THE SANTA MONICA MOUNTAINS AND SANTA SUSANA
For additional details, see the latest Day 1 Fire Weather Forecast.
https://www.spc.noaa.gov/products/fire_wx/fwdy1.html

Quote:
Valid 201200Z - 211200Z

...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL
MOUNTAINS WEST TOWARDS THE SANTA MONICA MOUNTAINS AND SANTA SUSANA
MOUNTAINS... INCLUDING THE MALIBU COAST...
...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA...

...Synopsis...
While most of the CONUS is dominated by cold air and high pressure,
a strong, positively-tilted mid-level trough will move southward
across California, with a highly amplified mid-level Pacific ridge
following behind it. As the trough axis reaches southern California
Monday afternoon, intensifying surface pressure gradients will
result in the development of strong Santa Ana winds.

The 00Z HREF guidance and global ensembles continue to forecast
strong LAX->DAG pressure gradients ranging from -8 mb to -11 mb,
with wind speeds trending upward to 40-45 MPH sustained (gusting 70
- 100 MPH on the mountains, 50 - 80 MPH in the valleys/coastal
regions). In addition to the upward trend in wind speed and gust
forecasts, relative humidity values have trended significantly
drier, with values as low as 2%-5%. These Extremely Critical
fire-weather conditions, supporting rapid wildfire onset and spread,
will begin Monday afternoon and reach peak intensity Monday evening
into Tuesday morning. The area of greatest risk lies from the San
Gabriel Mountains westward into the Santa Monica Mountains, the
Malibu Coast, and the Santa Susana Mountains.


Extremely critical fire weather conditions are forecast on Tue (01/21). See details..

https://www.spc.noaa.gov/products/fire_wx/fwdy2.html
Quote:
Synopsis...
A strong Santa Ana wind event beginning Monday afternoon will
persist well into Tuesday afternoon and evening, resulting in
widespread Critical and Extremely Critical fire-weather conditions
across much of Southern California.

...Extremely Critical fire-weather conditions for the San Gabriel,
Santa Monica, and Santa Susana Mountains...
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