Fire Weather Outlook Discussion
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FNUS21 KWNS 170805
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0304 AM CDT Thu Aug 17 2017

Valid 171200Z - 181200Z

...Synopsis...
As one mid/upper trough shifts eastward into the northern Plains and
another trough approaches the British Columbia coast, a mid/upper
ridge is expected to briefly build into portions of the Northwest
today. A cold front is expected to move through portions of the
northern Rockies and northern High Plains, resulting in some
increase in the fire weather threat.

...Montana into the far western Dakotas...
A relatively dry and breezy post-frontal regime will result in a
threat of elevated fire weather conditions across much of Montana
east of the Continental Divide, potentially spreading eastward into
the western Dakotas. Sustained winds of 15-20 mph are possible as RH
values drop to near or below 20% during the afternoon. While locally
critical conditions are possible, especially from central into
southeast MT, confidence in sustained winds exceeding 20 mph is too
low for an upgrade at this time.

...Washington/Oregon/Idaho...
Locally elevated conditions will be possible across portions of
central/eastern WA/OR in the lee of the Cascades, and also across
portions of the Snake River Valley in Idaho. RH may fall to near
critical thresholds across these areas, though wind speeds are
expected to remain relatively light outside of localized
terrain-favored locations.

..Dean.. 08/17/2017

...Please see www.spc.noaa.gov/fire for graphic product...

$$



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