Storm Prediction Center Day 2 Fire Weather Outlook

Created: Fri Jun 22 06:55:03 UTC 2018 (20180622 1200Z Day 2 FireWX shapefile | 20180622 1200Z Day 2 FireWX KML)

Day 2 Fire Weather Forecast graphic
Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
Critical 41,732 285,004 St. George, UT...Cedar City, UT...Boulder City, NV...Washington, UT...Hurricane, UT...

Click for Day 2 FireWX Areal Outline Product (KWNSPFWFD2)

   FNUS22 KWNS 220654

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0154 AM CDT Fri Jun 22 2018

   Valid 231200Z - 241200Z


   An upper-level trough will dig into the Great Basin on D2/Saturday.
   Strong mid-level flow will mix down to the surface as well-mixed
   boundary layers deepen over the course of the day. At the surface, a
   trough will develop in response the upper-level wave and enhance the
   surface winds further. A similar scenario will unfold in northern
   California, where strong northerly/northwesterly flow on the back
   side of the trough -- coupled with a surface trough -- will yield
   strong surface winds. Strong surface winds will overlap with
   critically low RH across the highlighted areas.

   ...Portions of the Great Basin into northwest Arizona...
   Strong mid-level flow will mix down to the surface in the afternoon
   with already enhanced surface due to a surface trough in the Great
   Basin. Surface winds will range from 20-25 mph with RH values
   dipping to 5-15%. Small southward extension of the critical area was
   made into Arizona on account of recent stronger wind guidance.

   Elsewhere, a surrounding area of elevated fire weather conditions
   will exist across much of New Mexico, western Colorado, and portions
   of Utah and Nevada. These locations will experience RH values 5-15%,
   however winds will not reach critical levels with their displacement
   from the stronger mid-level flow.

   ...Northern California...
   Elevated to locally critical fire weather conditions will exist in
   parts of the Sacramento Valley. Strong mid-level winds accompanied
   by a strong surface pressure gradient will yield winds in the 15-20
   mph range. RH values will fall to 5-15% with the downsloping
   northerly/northwesterly flow. Critical winds will likely be too
   localized to warrant critical designation.

   ..Wendt.. 06/22/2018

   ...Please see for graphic product...


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