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

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 190542

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1242 AM CDT Mon Oct 19 2026

   Valid 191200Z - 201200Z

   ...Synopsis...
   An upper-level trough positioned offshore of the Pacific Northwest
   will shift south and amplify throughout the day, resulting in some
   enhancement to the upper-level flow overspreading this region,
   including portions of the upper Great Basin. At the surface, winds
   should increase throughout the day via diurnal heating/mixing. 
   Elsewhere in the CONUS, relatively light winds should prevail in the
   wake of a trough exiting the East Coast, with broad/weak zonal flow
   aloft and surface high pressure present over the eastern two thirds
   of the CONUS.

   ...Northeastern California, southern/southeastern Oregon, and
   northwestern Nevada...
   Elevated fire-weather conditions are forecast for this region today.
   Sustained wind speeds should peak around 15-20 mph (with localized
   gusts up to 25-30 mph possible, particularly across the northern
   Sierra), while RH values fall into the low 20s and upper teens amid
   dry/receptive fuels. The elevated area has been maintained and
   expanded slightly westward, based on the latest high-resolution
   guidance.

   ..Karstens.. 10/19/2026
      

U.S. Day 2 Fire Weather Outlook


   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 190544

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1244 AM CDT Mon Oct 19 2026

   Valid 201200Z - 211200Z

   ...NO CRITICAL AREAS...

   ...Synopsis...
   An upper-level trough positioned off the West Coast will continue
   drifting south throughout the day, resulting in continued
   amplification and strengthening of southwesterly flow overspreading
   much of the West. Despite breezy onshore south-southwesterly winds
   (sustained near 15-20 mph) across portions of southern/central
   California, RH values are forecast to remain well above critical
   criteria along with increasing chances for precipitation. Thus,
   fire-weather concerns remain low for this region, with perhaps
   locally elevated conditions possible across portions of far
   northeast California and vicinity.

   Elsewhere, fire-weather concerns remain low as well as broad/weak
   flow aloft and surface high pressure continues to prevail.

   ..Karstens.. 10/19/2026


U.S. Day 3-8 Fire Weather Outlook


   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 182050

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0350 PM CDT Sun Oct 18 2026

   Valid 201200Z - 261200Z

   ..Synopsis...
   The upper pattern will remain fairly stagnant across the eastern
   CONUS through the first half of the workweek. Upper ridging will
   continue over the central U.S. as a cut-off low meanders along the
   Atlantic coast through Day 4/Wednesday. With surface high pressure
   centered to the north and upper ridging over the central U.S., warm
   and dry conditions will prevail in the Southeast. Fuels across this
   region are expected to grow increasingly more receptive,
   particularly in the lower MS River Valley where forecast ERCs are
   portrayed at or above the 95th percentile by Day 4/Wednesday.
   Lighter prevailing winds should keep broader fire weather concerns
   low, however. Ensemble guidance depicts upper ridging may transition
   into the eastern CONUS late in the forecast period, indicating the
   return of widespread above normal temperatures amid a persisting dry
   airmass. 

   Farther west, a closed low will position just off the coast of
   western CA on Days 3-4/Tuesday-Wednesday. This system will have a
   slow forward progression into the Interior West, ejecting into the
   Great Plains late-week/next weekend. This pattern should bring
   additional precipitation and cooler temperatures to much of the
   Intermountain West, and potentially provide some relief to a drying
   fuelscape across the Coast Ranges and Sierra Nevada in California.

   ..Elizalde-Garcia.. 10/18/2026
      




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