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Day 3-8 Fire Weather Outlook Issued on Sep 21, 2017
Updated: Thu Sep 21 20:08:03 UTC 2017  (Print Version)
Note: Fire weather probabilistic information in MS-Word or PDF.
Note: Through September 29, 2015 the SPC will issue Experimental Probabilistic Fire Weather Dry Thunder and Strong Wind Outlooks for Days 3 to 8 with individual web graphics. Mouse over or click on the tabs above the graphic to view daily Probabilistic Dry Thunder (DryT) and Strong Wind (Wind) Fire Weather Outlooks. Please read the Product Description Document (PDD) and provide feedback using this link: "
Categorical D3-8 FW Otlk D3 D4 D5 D6 D7 D8
Exp. DryT/LowRH/Wind D3 D4 D5 D6 D7 D8
Population Cities CWAs Interstates Counties FEMA Regions

Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
D3Sat, Sep 23, 2017 - Sun, Sep 24, 2017 D6Tue, Sep 26, 2017 - Wed, Sep 27, 2017
D4Sun, Sep 24, 2017 - Mon, Sep 25, 2017 D7Wed, Sep 27, 2017 - Thu, Sep 28, 2017
D5Mon, Sep 25, 2017 - Tue, Sep 26, 2017 D8Thu, Sep 28, 2017 - Fri, Sep 29, 2017
(All days are valid from 12 UTC - 12 UTC)
   FNUS28 KWNS 212006

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0306 PM CDT Thu Sep 21 2017

   Valid 231200Z - 291200Z

   A deep upper trough will meander over the western U.S. through early
   next week while an upper ridge encompasses the eastern U.S. By the
   middle of the week, the western upper trough will begin to eject
   eastward across the upper Midwest and Great Lakes. In the wake of
   the upper trough, an amplified ridge will once again build across
   the West. 

   ...Day 4-6/Sun-Tue - California...

   As the upper trough slowly pushes eastward across the Intermountain
   West, surface high pressure will build over the Great Basin. This
   will result in several days of deep north to northeasterly flow
   across CA, and light offshore/downslope winds are expected. High
   temperatures will climb into the 80s to near 90 degrees each
   afternoon and RH values will fall into the 10-20 percent range in
   lower elevations. At this time, the forecast surface pressure
   gradient across the region is modest, and surface wind speeds are
   not expected to reach critical criteria. However, where fuels are
   dry, elevated fire weather conditions will be a concern given warm
   temperatures, low RH and occasionally gusty winds.

   ..Leitman.. 09/21/2017

   ...Please see for graphic product...


Fire Wx Graphics | Links | Product Info | Fire Weather Composite Maps (updated 4 times daily)

To retrieve previous Day 3-8 FireWX outlooks, type in the date you wish to retrieve in YYMMDD (e.g., 060205 for Feb. 5, 2006).
Data available since January 1, 2006.
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