Storm Prediction Center Day 2 Fire Weather Outlook

Created: Fri Jan 10 19:53:03 UTC 2025 (20250110 2000Z Day 2 FireWX shapefile | 20250110 2000Z Day 2 FireWX KML)

Day 2 Fire Weather Forecast graphic
Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
Critical 5,177 5,173,901 Riverside, CA...San Bernardino, CA...Ontario, CA...Fontana, CA...Santa Clarita, CA...

Click for Day 2 FireWX Areal Outline Product (KWNSPFWFD2)

   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 101952

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0152 PM CST Fri Jan 10 2025

   Valid 111200Z - 121200Z

   ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF SOUTHERN CA...

   ...20z Update...
   As the initial strong offshore winds over southern CA fade into
   early D2/Saturday, a brief lull in fire-weather activity is expected
   before another surge of offshore flow develops overnight into early
   D3/Sunday. Moderate offshore pressure gradients of 2-4 mb are
   expected to bolster winds across parts of Santa Barbra and
   LA/Ventura Counties through the overnight hours. While RH is not
   expected to be as low initially and overnight (15-25%), strong gusts
   of 20-40 mph through the terrain-favored locations in the western LA
   Basin and across Orange County are likely to support several hours
   of elevated to critical fire-weather concerns from late D2/Saturday
   into early D3/Sunday morning. Strong gusts and critical fire-weather
   concerns will likely continue through much of D3/Sunday. The
   Elevated area was expanded and a Critical area was added over the
   higher terrain and gap areas in coordination with LOX and SGX.

   ..Lyons.. 01/10/2025

   .PREV DISCUSSION... /ISSUED 0141 AM CST Fri Jan 10 2025/

   ...Synopsis...
   A mid-level trough will rapidly traverse the West Coast as another
   upper trough impinges on the Mississippi Valley tomorrow (Saturday).
   A surface low will move across the Midwest in tandem with the
   Mississippi Valley upper trough, with secondary surface low
   development likely over the southern High Plains. Downslope flow is
   likely over eastern New Mexico into western Texas. However,
   questions remain regarding how low RH will dip by afternoon peak
   heating, precluding fire weather highlights this outlook. 

   An upper trough traversing the West Coast will encourage some dry
   offshore flow across southern California. Though guidance differs on
   how dry the surface airmass will be, sustained offshore wind speeds
   may exceed 15 mph, especially in terrain-favored areas, warranting
   Elevated highlights.

   ...Please see www.spc.noaa.gov/fire for graphic product...

      

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