ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 200808

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0208 AM CST Mon Jan 20 2025

   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. 

   Elsewhere, Critical fire-weather conditions extend southward to the
   U.S./Mexico border, where strong (and critically dry) offshore winds
   will persist overnight into Tuesday morning.

   ..Halbert.. 01/20/2025