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

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 230554

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1254 AM CDT Fri May 23 2025

   Valid 231200Z - 241200Z

   ...CRITICAL FIRE WEATHER AREA FOR EAST-CENTRAL ARIZONA INTO
   WEST-CENTRAL NEW MEXICO...

   ...Synopsis...
   Southwesterly flow aloft will increase ahead of an approaching wave
   across southwestern US today, bringing an increase in southwest
   surface winds. A very dry air mass and deeply mixed profiles will
   support relative humidity reductions to around 10-15 percent (as low
   as 5-10 percent) and sustained winds 15-20 mph across much Arizona
   into New Mexico. Fuels along the Mogollon Rim in Arizona into
   western New Mexico are receptive to fire spread, with ERCs near the
   75th-90th percentile. As such, these are the areas where Critical
   highlights have been maintained, with broader Elevated highlights
   across much of eastern Arizona into western New Mexico. Elevated
   conditions will also extend into eastern Utah and western Colorado.

   ..Thornton.. 05/23/2025
      

U.S. Day 2 Fire Weather Outlook


   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 230635

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0135 AM CDT Fri May 23 2025

   Valid 241200Z - 251200Z

   ...Synopsis...
   A mid-level wave will shift across the Southwest on Saturday.
   Enhanced mid-level flow will largely pass overnight D1/Friday into
   D2/Saturday, with relaxing pressure gradients through the day.
   Though afternoon relative humidity will remain low (around 10
   percent), this relaxing gradient will keep winds largely below
   Critical values. In addition, an increase in mid-level cloud cover
   is expected which may limit mixing. In more favored downslope
   regions, locally stronger winds will be possible and support periods
   of localized Critical fire weather. Overall, the broad Elevated
   delineation was maintained where highest confidence in sustained
   Elevated conditions were expected across eastern Arizona into
   southeastern Utah and across south-central/western New Mexico.

   ..Thornton.. 05/23/2025


U.S. Day 3-8 Fire Weather Outlook


   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 222155

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0455 PM CDT Thu May 22 2025

   Valid 241200Z - 301200Z

   An upper-level trough will support breezy and dry conditions across
   portions of the Southwest through Day 4/Sunday, promoting an
   Elevated to locally Critical fire weather threat with dry fuels in
   place. An upper-level trough will bring cooler temperatures and some
   precipitation to the Pacific Northwest and Northern Rockies for the
   Day 5-6/Monday-Tuesday time frame. An overall ridging pattern sets
   up over the Western U.S. by the middle of next week supporting above
   normal temperatures but light winds for much of the region. Residual
   mid-level moisture under the ridge combined with daytime
   heating/instability should support convection/isolated thunderstorms
   in higher terrain across the Central and Northern Rockies Day
   6-8/Tuesday-Thursday, although higher terrain fuels should remain
   largely unavailable for significant fire spread, limiting ignition
   efficiency.

   ...Southwest...
   Primary fire weather concern remains across the Southwest U.S.
   through at least Day 4/Sunday. An upper-level trough with associated
   accelerated mid-level southwest flow will bring another period of
   dry and breezy conditions to portions of the Southwest on Day
   3/Saturday. Given the rather diffuse and broad mid-level flow, a 40
   percent Critical probability was maintained for portions of the
   Upper Colorado River Basin, Mogollon Rim and southwestern New
   Mexico. The fire weather threat shifts farther south and east into
   southern New Mexico and far West Texas by Day 4/Sunday as the trough
   ejects into the Great Plains by Day 5/Monday.

   ..Williams.. 05/22/2025
      




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