ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 042145

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0445 PM CDT Sat Jul 04 2020

   Valid 061200Z - 121200Z

   Western United States midlevel long-wave trough is expected to hold
   across all but the Southwest through the upcoming weak. At the same
   time, a midlevel anticyclone/high will develop across the Southwest
   and strengthen by the end of the week. The result will be persistent
   southwest midlevel flow from southern Great Basin into the central
   Rocky Mountains.

   ...Days 3-5/Monday-Wednesday
   A seasonably strong short-wave trough is expected to move through
   the western long-wave trough early next week. As this occurs,
   strengthening mid-level flow will occur atop an increasingly
   warm/hot and dry surface. Dynamic and thermodynamic mixing will
   bring this stronger midlevel flow to the surface resulting in
   elevated to critical fire conditions. At this time highest
   confidence in critical conditions (winds 20-25 mph and relative
   humidity below 10 percent) will be on Tuesday from southern Nevada
   into far western Colorado. However, as confidence in the corridor of
   strongest flow increases, this area of critical fire conditions may
   shift slightly.

   After Tuesday southwest flow aloft will persist across the Great
   Basin as the Southwest midlevel ridge/anticyclone strengthens.
   Embedded perturbations within this broader midlevel flow pattern
   will bring the potential for elevated to critical fire conditions
   across portions of the Great Basin. However, predictability in the
   location and timing of these perturbations is sufficiently low to
   include probabilities at this time.

   ..Marsh.. 07/04/2020

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

   $$

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