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SPC Day 2 Fire Weather Outlook

SPC Day 2 Fire Weather Outlook
          
Day 2 Fire Weather Outlook Image
Day 2 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0146 PM CDT Sat Jul 22 2017

Valid 231200Z - 241200Z

An elevated area is introduced across parts of the Columbia Basin
and vicinity. As a mid-level impulse over British Columbia glances
the region Sunday, a modestly enhanced surface pressure gradient
will foster breezy conditions across parts of central/eastern
Washington and far northern Oregon. Sustained west/northwesterly
winds around 10-20 mph and RH values near 15-25% will combine with
dry fuels to promote elevated concerns during the afternoon and
evening hours.

Farther south, the isolated dry-thunderstorm designation remains
largely unchanged. While pockets of scattered convection may develop
across this region, slow storm motions and a lack of a stronger
focus preclude a scattered dry-thunderstorm area at this time.

..Picca.. 07/22/2017

.PREV DISCUSSION... /ISSUED 0322 AM CDT Sat Jul 22 2017/

...Synopsis...
On Sunday, an upper trough is expected to move eastward across
portions of British Columbia and Alberta, while a slow-moving upper
trough further to the south will approach the northern California
coast. Some slight weakening of the upper ridge over the Great Basin
and central/northern Rockies is possible in response to these
features. At the surface, a low pressure area is expected to
strengthen late in the period across the southern Canadian Prairie
provinces, as a trailing cold front approaches portions of the
northern High Plains by Monday morning. 

...Southern OR/Northern CA into the Great Basin...
Limited but sufficient monsoon moisture will support isolated to
widely scattered thunderstorms on Sunday afternoon/evening from
portions of northern CA/OR into the Great Basin. Relatively slow
storm motions may allow for localized wetting rainfall, but
thermodynamic profiles will support some dry thunderstorm activity,
so an isolated dry-thunderstorm area has been included to cover this
threat. The upper trough approaching northern CA has some potential
to increase thunderstorm coverage across portions of this area,
though this remains uncertain given some guidance indicating this
system will stall off the coast.

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

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