140
FNUS22 KWNS 201952
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0152 PM CST MON JAN 20 2025
VALID 211200Z - 221200Z
...EXTREMELY CRITICAL FIRE WEATHER AREA FOR THE SAN GABRIEL
MOUNTAINS WEST TOWARDS THE SANTA MONICA MOUNTAINS AND SANTA SUSANA
MOUNTAINS...INCLUDING THE MALIBU COAST...
...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE EASTERN
SAN DIEGO FOOTHILLS INTO THE WESTERN SAN JACINTO MOUNTAINS...
..CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CALIFORNIA
THE PREVIOUS FORECAST (SEE BELOW) REMAINS ON TRACK, AND ONLY MINOR
ADJUSTMENTS WERE MADE TO THE DAY 2/TUESDAY OUTLOOK. MOST NOTEWORTHY,
THE EXTREMELY CRITICAL HIGHLIGHTS ALONG THE SAN JACINTO MOUNTAINS
WERE EXPANDED SLIGHTLY NORTHWARD TOWARD THE SAN BERNARDINO MOUNTAINS
IN NORTHERN RIVERSIDE COUNTY. THE LATEST HIGH-RESOLUTION GUIDANCE IS
IN VERY GOOD AGREEMENT HERE, DEPICTING A GAP-FLOW ENHANCEMENT TO THE
WINDS -- FAVORING SEVERAL HOURS OF SUSTAINED SURFACE WINDS AROUND 40
MPH (WITH HIGHER GUSTS) AMID SINGLE-DIGIT RH. LOCALIZED EXTREMELY
CRITICAL CONDITIONS ARE ALSO POSSIBLE ALONG THE SANTA ANA MOUNTAINS
DURING THE MORNING/EARLY AFTERNOON HOURS.
..WEINMAN.. 01/20/2025
PREV DISCUSSION
/ISSUED 0208 AM CST MON JAN 20 2025/
..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...
EXTREMELY CRITICAL FIRE-WEATHER CONDITIONS WILL PERSIST FROM THE DAY
1 OUTLOOK PERIOD (MON) WELL INTO DAY 2 (TUES). SUSTAINED WINDS OF
40-45 MPH (GUSTING 70-100 MPH ON MOUNTAINS, 50-80 MPH IN THE
VALLEYS/COASTAL REGIONS) WITH SINGLE-DIGIT RELATIVE HUMIDITY VALUES
AS LOW AS 2%-5% WILL BE ONGOING AT THE START OF THE PERIOD,
SUBSIDING BY LATE TUESDAY AFTERNOON/EARLY TUESDAY EVENING. FOR MORE
DETAILS, SEE THE CURRENT DAY 1 FIRE-WEATHER OUTLOOK.
...EXTREMELY CRITICAL FIRE-WEATHER CONDITIONS FOR PORTIONS OF THE
EASTERN SAN DIEGO FOOTHILLS INTO THE WESTERN SAN JACINTO
MOUNTAINS...
CONFIDENCE HAS INCREASED IN STRONG, DRY OFFSHORE FLOW ACROSS FAR
SOUTHERN CALIFORNIA, PARTICULARLY PORTIONS OF THE EASTERN SAN DIEGO
FOOTHILLS INTO THE SAN JACINTO MOUNTAINS. RECENT 00Z HREF GUIDANCE
SHOWS ENSEMBLE MEAN SUSTAINED SURFACE WINDS AS HIGH AS 50-55 MPH,
WITH THE ENSEMBLE MAXIMUM AS HIGH AS 60 MPH AND GUSTS AS HIGH AS 80
MPH. COUPLED WITH SINGLE-DIGIT RELATIVE HUMIDITIES, THIS WILL RESULT
IN SEVERAL HOURS OF EXTREMELY CRITICAL FIRE-WEATHER CONDITIONS
SUPPORTIVE OF RAPID WILDFIRE ONSET AND SPREAD, SUBSIDING BY LATE
TUESDAY EVENING INTO WEDNESDAY MORNING.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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