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< Day 2 FW Outlook    
Day 3-8 Fire Weather Outlook Issued on Jul 21, 2017
Updated: Fri Jul 21 20:51:03 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
D3Sun, Jul 23, 2017 - Mon, Jul 24, 2017 D6Wed, Jul 26, 2017 - Thu, Jul 27, 2017
D4Mon, Jul 24, 2017 - Tue, Jul 25, 2017 D7Thu, Jul 27, 2017 - Fri, Jul 28, 2017
D5Tue, Jul 25, 2017 - Wed, Jul 26, 2017 D8Fri, Jul 28, 2017 - Sat, Jul 29, 2017
(All days are valid from 12 UTC - 12 UTC)
   FNUS28 KWNS 212049

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0349 PM CDT Fri Jul 21 2017

   Valid 231200Z - 291200Z

   A mid/upper ridge will remain anchored over parts of the Great Basin
   late this weekend, before gradually shifting east/southeast towards
   the southern/central Plains. This will occur in conjunction with
   multiple northern-stream impulses advancing eastward near the
   Canadian border, as well as a weak upper low approaching the
   northern California coast. As this low approaches and the
   aforementioned high shifts east, monsoon-related moisture will
   stream north across the Great Basin, eventually reaching the
   northern Rockies during the first half of next week. Thereafter,
   generally cyclonic flow should envelop the Northwest, with
   thunderstorm chances persisting to the east/southeast across parts
   of the Great Basin and northern Rockies.

   Thunderstorm chances will increase late this weekend across the
   western/northern Great Basin and parts of the Pacific Northwest, as
   mid-level moisture advances north and interacts with the approaching
   low. Favorably dry fuels and deep/dry boundary-layer conditions will
   support the risk of dry lightning strikes on D3/Sun. While there may
   be some pockets of more focused coverage (potentially necessitating
   a scattered/critical dry-thunder area in upcoming outlooks), modest
   storm motions and uncertainty in the location of more focused areas
   preclude an upgrade at this time. As moisture continues to stream
   northward, storms will gradually transition to wetter modes through
   the first half of next week, shunting the highest probability of dry
   lightning strikes northward. This transition is reflected in the
   inclusion of 10%/marginal areas on D4/Mon and D5/Tue.

   With the influence of the larger-scale trough (and more subtle
   passing impulses) across the interior Pacific Northwest through the
   week, there may be occasional periods of breezy/dry conditions
   across the Columbia Basin and northern Rockies. However, the
   potential for widespread critical wind speeds appears too low for
   probabilities at this time.

   ..Picca.. 07/21/2017

   ...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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