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U.S. Day 1 Fire Weather Outlook

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 040535

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1235 AM CDT Tue Aug 04 2026

   Valid 041200Z - 051200Z

   ...Synopsis...
   An upper trough will expand across the northern Plains and Upper
   Midwest with strong westerly flow overspreading southeastern Idaho
   into the Dakotas. Meanwhile, a weak upper low will separate from a
   departing eastern CONUS trough, providing enough forcing for
   afternoon thunderstorms across the Southeast. 

   A weak surface low will emerge across the Four Corners region,
   tightening a surface pressure gradient along the West Slope; as a
   result, gusty winds are expected across portions of the Great Basin
   and Colorado Plateau this afternoon. Strong daytime mixing will
   result in RH values of 5-15% and sustained westerly winds of 12-20
   mph (gusts up to 30 mph) amid receptive fuels, maintaining Elevated
   fire weather highlights. Farther west, hot, dry, and unstable
   conditions are expected along/near a thermal trough extending out of
   northern California into western Oregon/Washington. Lighter winds
   across the spatial region preclude an introduction of fire weather
   highlights; however, gusty winds in terrain-favored areas could
   result in locally elevated conditions.

   ..Elizalde-Garcia.. 08/04/2026
      

U.S. Day 2 Fire Weather Outlook


   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 040536

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1236 AM CDT Tue Aug 04 2026

   Valid 051200Z - 061200Z

   ...NO CRITICAL AREAS...

   ...Synopsis...
   Upper-level troughing over the north/central U.S. will gradually
   shift eastward into the Great Lakes region, while upper ridging
   continues to strengthen and lift northward across the western CONUS.
   A dry airmass will persist in the Interior West amid a very dry
   fuelscape, but weakening mid/upper-level flow as the trough departs
   should limit broader sustained winds to less than 15 mph. However,
   locally elevated fire concerns may emerge across southeast Idaho
   into portions of the Colorado Plateau and adjacent higher elevations
   where terrain-driven winds combine with RH values of 5-15%. Farther
   west, locally elevated fire weather conditions are expected as a
   thermal trough extending out of northern California into western
   Oregon/Washington promotes hot, dry, unstable, and localized breezy
   winds.

   ..Elizalde-Garcia.. 08/04/2026


U.S. Day 3-8 Fire Weather Outlook


   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 032141

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0441 PM CDT Mon Aug 03 2026

   Valid 051200Z - 111200Z

   An upper-level ridge will build over the West as upper-level
   troughing exits the northern Rockies/Plains Day 3/Wednesday - Day
   4/Thursday. Upper-level troughing will approach the Pacific
   Northwest beginning on Day 4/Thursday and begin to shift and
   eventually flatten the ridge over the northwestern US late in the
   week and this weekend. Forecast uncertainty remains regarding the
   magnitude and duration of the flattening/break down of the
   upper-level ridge over the northwestern US this weekend and early
   next week. 

   Breezy west-northwest winds amid critical RH are likely to continue
   on Day 3/Wednesday across portions of southeast Idaho through
   southwest Wyoming and into Colorado west of the Divide. Locally
   elevated conditions are likely, especially if stronger flow aloft
   remains over these areas on the periphery of the upper-level trough
   moving over the north-central CONUS. Locally elevated conditions are
   also possible as hot, dry, unstable, and locally breezy winds are
   expected again along/near a thermal trough across portions of
   northern California and western Oregon. 

   With the expected flattening and potential break down of the
   upper-level ridge over the northwestern US, dry/windy conditions are
   likely to return to the region. As westerly winds strengthen amid a
   dry airmass, elevated to critical fire weather conditions are likely
   to develop across portions of the Inland Northwest extending
   southward to the Sierra Front and across portions of the northern
   Great Basin and northern Rockies onto the northern High Plains.
   Forecast guidance indicates Day 5/Friday as the most likely day for
   these conditions to occur, which is why a 40% area was introduced.
   However, these conditions could continue and spread/shift farther to
   the south/east on Day 6/Saturday. The aforementioned forecast
   uncertainty with the timing/magnitude of the ridge break down
   precludes expanding or including additional probabilities at this
   time. 

   Monsoonal moisture will remain mostly confined to southern Arizona
   into portions of New Mexico through mid-week. Moisture will likely
   begin to spread northward into portions of northern Arizona and
   eventually into the Great Basin late in the week and over the
   weekend. Isolated mixed wet/dry thunderstorms are possible over
   portions of southern Nevada/Utah beginning as early as Day
   4/Thursday, with chances increasing into the weekend as moisture is
   forecast to continue moving northward. While thunderstorms are
   likely to return to portions of the Great Basin late this week and
   this weekend, there is too much forecast uncertainty regarding the
   overlap of drier storms and receptive fuels to introduce dry
   thunderstorm probabilities at this time.

   ..Nauslar.. 08/03/2026
      




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