Storm Prediction Center Day 1 Fire Weather Outlook

Created: Sun Aug 19 16:34:03 UTC 2018 (20180819 1700Z Day 1 FireWX shapefile | 20180819 1700Z Day 1 FireWX KML)

Day 1 Fire Weather Forecast graphic
Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast

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   FNUS21 KWNS 191633

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1133 AM CDT Sun Aug 19 2018

   Valid 191700Z - 201200Z

   The ongoing forecast is on track and no major changes are needed. 
   Isolated thunderstorms containing dry lightning strikes remain
   possible across portions Oregon, western Idaho, and southern
   Washington.  Additionally, locally elevated fire weather conditions
   will occur at times across far western Nevada and far northeastern
   California, where westerly surface flow will approach 15 mph at
   times amidst 10-15% RH values and dry fuels.

   See the previous discussion below for more details.

   ..Cook.. 08/19/2018

   .PREV DISCUSSION... /ISSUED 0132 AM CDT Sun Aug 19 2018/

   ...Pacific Northwest...

   A shortwave trough will track east across WA/OR today and tonight.
   As the trough moves inland, cooling midlevel temperatures will
   result in steepening lapse rates atop modest boundary layer
   moisture. By peak heating, 500-1000 J/kg MLCAPE is forecast and
   isolated thunderstorms are expected from late afternoon and into the
   nighttime hours. PW values will range from around 0.6-0.8 inches
   with very dry sub-cloud layers indicated in forecast soundings. As a
   result, wetting rains are not expected and isolated dry
   thunderstorms will pose a threat for new ignitions.

   ...Please see for graphic product...


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