ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 090458

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1158 PM CDT Tue Sep 08 2026

   Valid 101200Z - 111200Z

   ...Synopsis...
   A mid/upper trough will push into the Northwest D2/Thursday while a
   deepening surface trough and cold front evolve over the southern
   Canadian prairies. Dry and breezy conditions developing in advance
   of a cold front will enhance fire weather concerns across portions
   of the northern Rockies and northern High Plains, where fuels remain
   largely receptive.

   ...Eastern Idaho, southern Montana and portions of Wyoming...
   West/northwest surface flow south of the mid-upper trough entering
   the northwestern CONUS will expand and increase in magnitude across
   much of the northern Great Basin into southern ID, southern MT and
   parts of WY by Thursday afternoon. A very dry boundary layer across
   much of the Intermountain West and Southwest will promote RH
   reductions to below 10% in lower elevations by peak afternoon
   heating. Broad west/northwest winds of around 15 mph coincident with
   the low RH during the day will promote an elevated fire weather
   threat primarily across eastern ID, southern MT and portions of WY
   where fuels remain more receptive. Localized critical fire weather
   conditions are most likely across south-central WY where 20 mph west
   winds at times align with single digit RH. Thus, elevated fire
   weather highlights were introduced with some expansions noted based
   on latest model guidance.

   ..Williams.. 09/09/2026

      

   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 082156

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0456 PM CDT Tue Sep 08 2026

   Valid 101200Z - 161200Z

   ...Synopsis...
   A mid-level shortwave trough will descend into the northwestern U.S.
   as a surface cyclone traverses the Canadian Prairies on Day
   3/Thursday. Strong flow aloft and a tightening surface pressure
   gradient will promote widespread dry and breezy conditions across
   the northern Great Basin into the northern Plains. A strong cold
   front will then navigate the north-central states as the shortwave
   trough departs on Day 4/Friday; meanwhile, dry west-southwesterly
   flow will overspread the northwestern CONUS. Ensembles are in
   general agreement for an upper-level low to invade the Pacific
   Northwest and Northern Rockies this weekend. This pattern may
   provide broader precipitation chances and much cooler temperatures,
   thus subduing fire weather concerns across most of the
   northwestern/northern CONUS into early next week.  

   ...Central Rockies into the Northern High Plains...
   A dry airmass and strong winds will expand across the northern Great
   Basin into the northern Plains on Day 3/Thursday. Westerly sustained
   winds of 15-25 mph and 10-20% RH values will increase fire weather
   concerns from far eastern ID/southwestern MT into the northern
   Plains where 80-95th percentile ERCs exist. Poor overnight humidity
   recoveries are forecast across eastern WY, western SD, and the NE
   Panhandle leading into a second consecutive day of concern; on Day
   4/Friday, RH values will quickly decline to 10-20% as winds
   accelerate ahead of an advancing cold front. Sustained westerly
   winds may approach 25 mph across the terrain-favored plains, then
   shift to northerly as the front passes. Notably, guidance indicates
   a 50-80% probability of wind gusts exceeding 35 mph through the
   afternoon. 40% Critical probabilities have been introduced on Day
   4/Friday across southeastern WY, northwestern NE Panhandle, and
   southwestern SD to account for this threat. 

   ...Northeastern California and western Great Basin...
   An Eastern Pacific upper low will impinge upon the northwestern U.S.
   on Day 5/Saturday, amplifying west-southwesterly flow over northern
   CA and the western Great Basin. Ensemble guidance depicts 70-90%
   probabilities of wind speeds exceeding 20 mph amid critically low RH
   in northeastern CA and northern NV, which would typically enhance
   fire weather concerns. However, forecast ERCs at the 50-70th
   percentile should mitigate a broader threat.

   ..Elizalde-Garcia.. 09/08/2026