Storm Prediction Center Day 1 Fire Weather Outlook

Created: Tue Jan 14 16:45:03 UTC 2025 ( | )

Click for Day 1 FireWX Areal Outline Product

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 141644

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1044 AM CST Tue Jan 14 2025

   Valid 141700Z - 151200Z

   ...EXTREMELY CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE WESTERN
   LA BASIN...
   ...CRITICAL FIRE WEATHER AREA FOR MUCH OF SOUTHERN CA...

   ...17z Update...
   Morning obs show offshore flow has been slow to develop across
   western Ventura and LA Counties. Stronger gusts of 50-60 mph were
   noted in the western San Gabriel mountains, and should become more
   common across the higher terrain through the afternoon. As
   mechanical mixing increases with diurnal heating, stronger winds
   should also develop across much of southern CA. Sustained 20-30 mph
   winds with RH below 20% is expected across the Ventura Plain and
   interior Valleys this afternoon, as upper-level winds become aligned
   with offshore gradients. This should promote several hours of
   high-end critical to localized extremely critical conditions through
   terrain-favored corridors. Critical fire concern should continue
   overnight as winds strengthen again into early D2/Wed morning. The
   prior outlook area is unchanged, see the previous discussion for
   more info.

   ..Lyons.. 01/14/2025

   .PREV DISCUSSION... /ISSUED 0152 AM CST Tue Jan 14 2025/

   ...Synopsis...
   A belt of stronger northeasterly mid-level flow will overspread
   southern California as a 500 mb cut-off low attempts to drift
   southwest from the coastline today. A localized tightening of the
   surface pressure gradient is likely during the morning hours,
   encouraging very strong, dry offshore flow from the Ventura Valley
   to the Laguna Mountains. Widespread 20-30 mph sustained offshore
   winds are likely (perhaps with gusts exceeding 50 mph at times) for
   much of the period, warranting the maintenance of Critical
   highlights. Similar to yesterday, the best chance for sustained
   30-40 mph winds amid 10 percent RH will be from around the Ventura
   Valley to the San Bernardino Mountains. Here, Extremely Critical
   highlights remain given the potential for very dangerous
   wildfire-spread conditions and the potential for extreme fire
   behavior.

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

      

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