U.S. Alerts
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U.S. Day 1 Fire Weather Outlook

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 050551

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1251 AM CDT Sat Sep 05 2026

   Valid 051200Z - 061200Z

   ...NO CRITICAL AREAS...

   ...Synopsis...
   Similar to Friday, upper-level troughing will persist across the
   Pacific Northwest and Northeast, with upper level ridging also
   remaining centered over the southern Great Plains. Modestly strong
   southwestern flow will continue across much of the Great Basin,
   northern Rockies, and northern High Plains. This troughing pattern
   and attendant precipitation, cloud cover, and cooler temperatures
   will continue to largely limit fire weather concerns across the
   western U.S. today. Elsewhere, a surface frontal system will
   continue to bring chances for rain to portions of the Midwest/East
   Coast.

   ...Central/Northern Wyoming...
   While less widespread compared to Friday, sustained southwesterly
   winds of 10-20 mph and RH values of 15-20% (locally down to 10%) may
   overlap areas of receptive fuels across portions of central and
   northern Wyoming this afternoon. These conditions may support
   locally elevated fire weather concerns; however, the duration and
   spatial extent of wind/RH overlap are forecast to remain relatively
   limited. Thus, Elevated highlights have been withheld. 

   ...Great Basin...
   Southwesterly flow of 15-25 mph amid minimum RH values of 10-20%
   will continue across the eastern/southern portions of the Great
   Basin today. Locally elevated fire weather conditions may develop
   where recent rainfall was minimal and/or where pockets of dry fuels
   remain. Generally marginal fuels across this region are expected to
   preclude a broader fire weather risk, however.

   ..Chalmers.. 09/05/2026
      

U.S. Day 2 Fire Weather Outlook


   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 050553

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1253 AM CDT Sat Sep 05 2026

   Valid 061200Z - 071200Z

   ...NO CRITICAL AREAS...

   ...Synopsis...
   Persistent upper-level troughing over the Pacific Northwest and
   Northeast will continue on Day 2/Sunday, with upper ridging
   remaining in place over the southern Plains. A series of shortwave
   troughs embedded within strengthening southwesterly flow will
   transition northeastward across portions of the Great Basin/Northern
   Rockies, which will begin to advect subtropical moisture into the
   Desert Southwest/Great Basin, likely bringing additional cloud cover
   and some chances for rain to the region. These factors will largely
   mitigate fire weather concerns in the western U.S.

   ...Eastern Idaho into central/northern Wyoming...
   Dry and breezy conditions are forecast across portions of eastern
   Idaho and central/northern Wyoming Sunday afternoon. These
   conditions may support locally elevated fire weather concerns across
   this region, especially across central/northern Wyoming where drier
   fuels exist. The expected limited duration and spatial extent of
   meteorological conditions combined with uncertainty regarding cloud
   cover and its impact on RH reductions precludes the addition of
   Elevated highlights at this time, however.

   ...Central Great Basin...
   Another day of dry, southwesterly flow is forecast across portions
   of the central Great Basin. Locally elevated fire weather conditions
   may develop where pockets of drier fine fuels exist; however, a
   broader fire weather risk is not anticipated owing to generally
   marginal fuels.

   ..Chalmers.. 09/05/2026


U.S. Day 3-8 Fire Weather Outlook


   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 042121

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0421 PM CDT Fri Sep 04 2026

   Valid 061200Z - 121200Z

   ...Synopsis...
   An upper-level trough bringing much of the northwestern U.S. cooler
   temperatures, cloud cover and rain will linger through the weekend,
   ejecting into the northern High Plains by Day 5/Tuesday. Subtropical
   moisture advecting into the Desert Southwest and Great Basin on Days
   3-4/Sunday-Monday will likely bring additional cloud cover and some
   rain to this region. This troughing pattern and attendant
   precipitation will largely mitigate fire weather concerns in the
   western U.S. through the middle of next week. Hot and dry conditions
   under a persistent upper ridge over the central CONUS are expected
   through the weekend, although accompanied by relatively light
   surface winds.

   ...Northern High Plains...
   As the aforementioned upper trough translates northeastward this
   weekend, advecting subtropical moisture will provide opportunities
   for rainfall across the north-central states. Despite cooler daytime
   temperatures, a drier airmass and strong southwesterly flow aloft
   could bring fire weather concerns back into portions of
   central-eastern Wyoming on Days 4-5/Monday-Tuesday. Critical
   probabilities have been withheld due to uncertainty in cloud cover
   and potential impacts from much anticipated precipitation, but may
   be needed in future outlook cycles where forecast meteorological
   conditions overlap rainfall-neglected fuels.

   ...Southern Plains...
   Beneath an accelerating upper-level trough and attendant mid-level
   jet, a surface low should evolve across the Northern Plains on Days
   4-5/Monday-Tuesday. The increasing pressure gradient will likely
   enhance southerly winds across the central and southern Plains where
   fuels remain very dry (forecast ERC values in the 90-95th percentile
   range amid areas of severe to extreme drought). This could pose a
   fire weather threat to portions of the central/southern Plains where
   rainfall deficits and cured/receptive fuels persist. However,
   forecast uncertainty in RH reductions and degree of a drier,
   downslope-enhanced southwesterly flow precludes introduction of
   critical probabilities at this time.

   ..Elizalde-Garcia.. 09/04/2026
      




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