ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 171930

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0230 PM CDT Tue Jun 17 2025

   Valid 181200Z - 191200Z

   Accelerating mid-level westerly flow in advance of an upper-level
   short wave will support breezy downslope flow across the Columbia
   Basin. Despite a slight intrusion of Pacific moisture, daytime
   relative humidity should still fall into the 20-25 percent range.
   Coupled with breezy west winds and dry fuels, Elevated highlights
   were maintained for the Columbia Basin where dry fuels will support
   fire spread.

   ..Williams.. 06/17/2025

   .PREV DISCUSSION... /ISSUED 1257 AM CDT Tue Jun 17 2025/

   ...Synopsis...
   Preceding a deep midlevel low west of British Columbia, a belt of
   strong midlevel westerly flow will overspread the Cascades. As a
   result, locally dry/breezy downslope flow will develop in the
   Columbia Basin during the afternoon. Around 15 mph sustained
   westerly surface winds (higher in the Cascade Gaps) and 20-25
   percent RH will favor elevated fire-weather conditions.

      

   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 172151

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0451 PM CDT Tue Jun 17 2025

   Valid 191200Z - 251200Z

   ...Day 3-4/Thursday-Friday...
   An upper-level trough will begin to enter the Pacific Northwest Day
   3/Thursday while upper-level ridging shifts eastward into the
   Plains. Increased mid-level flow atop a dry/well-mixed boundary
   layer will bring an expansive fire weather threat much of the Great
   Basin and Colorado Plateau in the form of breezy southwest winds and
   low relative humidity. A mid-level wind maxima rounding the southern
   periphery of an upper-level low then pushing into the Pacific
   Northwest will support even stronger southwest winds of 20-30 mph
   (locally higher in favored downslope regions) across much of
   central/southern Utah, northern Arizona and far western Colorado as
   well as northwestern Nevada where fuels have become increasingly
   supportive of wildfire spread. 70 percent probability of Critical
   fire weather conditions have been maintained and expanded within
   these areas.

   ...Day 5-8/Saturday-Tuesday...
   The warm, dry and breezy conditions supportive of wildfire growth in
   dry fuels will shift southeastward towards the upper Colorado River
   Basin and northern Arizona by the weekend. Magnitude of winds will
   wane by early next week as mid-level flow relaxes and shifts
   northeastward. However, the combination of increasingly dry fuels,
   drought and lack of rainfall will support an ongoing fire weather
   threat through Day 8/Tuesday across much of southeastern Utah,
   northern Arizona and far western Colorado.

   ...California Central Valley...
   Dry, post-frontal northerly flow along with low relative humidity
   and cured grasses will support at least an Elevated fire weather
   threat on Day 5/Saturday across the Central Valley.

   ..Williams.. 06/17/2025