ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 180518

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1218 AM CDT Fri Jul 18 2025

   Valid 191200Z - 201200Z

   ...Synopsis...
   A low-amplitude upper level trough will pivot through the Northwest
   on Saturday. In the lee of the northern Rockies, a surface low will
   deepen in central Montana. Mid-level moisture will be pushed
   slightly southward and eastward by the sagging upper trough in the
   Northwest. Additional thunderstorms are possible in the parts of the
   central/eastern Great Basin. However, PWAT values and slower storm
   motions do not suggest a significant threat for new ignitions.

   ...Columbia Basin and northern Nevada/southern Idaho...
   Elevated fire weather conditions are again expected in the Columbia
   Basin. With the core of the mid-level jet primarily being east of
   the region by the afternoon, the overall setup should favor slightly
   less strong wind coverage. Winds of 15-20 mph are still possible. RH
   may be a touch higher than on Friday with around 20% being probable
   during the afternoon.

   With the trough sagging southward and the surface low deepening, a
   zone of 15-20 mph (locally higher) winds is possible in parts of the
   northern Great Basin. RH could fall as low as 10-15% by the
   afternoon.

   ..Wendt.. 07/18/2025

      

   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 172155

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0455 PM CDT Thu Jul 17 2025

   Valid 191200Z - 251200Z

   ...Days 3-5/Saturday-Monday...
   A mid-level trough and attendant dry cold front will move through
   the Pacific Northwest on Day 3/Saturday. Robust onshore flow will
   persist across the Cascades, bringing breezy conditions to the
   Columbia Basin. Despite cooler post-frontal temperatures, sustained
   west winds of around 15 mph (20 mph in favored Cascade gaps) and
   relative humidity as low as 15 percent will support a fire weather
   threat amid dry fuels across the Columbia Basin. Enhanced mid-level
   flow at the base of the trough overrunning a dry boundary layer in
   place across southern Idaho will bring stronger winds to the Snake
   River Plain Day 3/Saturday, raising wildfire spread potential within
   critically dry fuels. A deepening, positively-tilted trough across
   the Pacific Northwest and increase in mid-level winds will support a
   broader area of dry southwesterly flow across the Great Basin, NV
   and southern ID by Day 4/Sunday, with the fire weather threat
   shifting southeastward to include northwestern UT by Day 5/Monday.
   The trough will also aid in pushing residual monsoon moisture and
   thunderstorm development currently across portions of the
   Intermountain West along and east of the Continental Divide by early
   next week, while also mitigating fire weather concerns for the
   Pacific Northwest as cooler temperatures, cloud cover and higher
   relative humidity move into the region.

   ...Days 6-8/Tuesday-Thursday...
   Long term ensemble guidance indicates some form of mid-level
   troughing persisting across the Pacific Northwest through the middle
   of next week, maintaining a dry southwesterly flow over much of the
   interior of the West. However, relaxing mid-level flow and reduced
   surface pressure gradients as a subtropical high propagates westward
   across the southern U.S. should promote lighter winds across the
   Southwestern U.S., particularly for Days 7-8/Wednesday-Thursday.

   ..Williams.. 07/17/2025