Fire Weather

SPC Day 1 Fire Weather Outlook

SPC Day 1 Fire Weather Outlook
          
Day 1 Fire Weather Outlook Image
Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0116 AM CDT Mon Jul 16 2018

Valid 161200Z - 171200Z

...Synopsis...
A mid-level shortwave trough will be moving over northern
California/southern Oregon and progressing eastward across the
northwestern Great Basin today. The northwestern periphery of
monsoonal mid-level moisture will also glance the Oregon/Idaho
region.

...Central/eastern Oregon, southern Idaho, northeast Nevada, far
northwest Utah...
Modest deep layer ascent will accompany the aforementioned shortwave
trough across the Pacific Northwest. With the addition of diurnal
heating, adequate buoyancy and deep-layer ascent should foster an
environment capable of supporting isolated to scattered
thunderstorms. Precipitable water values of 0.5-0.75 inches will be
common, along with a dry sub-cloud layer. While storm motions will
be rather slow, the dry sub-cloud layers will promote ample
evaporative cooling and localized gusty surface winds. While some
wetting storms are anticipated, potential exists for dry lightning
to occur. Fuels are receptive in the region and fire spread may be
enhanced by any region that can experience dry lightning with gusty
thunderstorm outflows. An isolated dry thunderstorm area was
delineated for regions where confidence is highest for dry strikes.

..Squitieri.. 07/16/2018

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

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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
0202 AM CDT Mon Jul 16 2018

Valid 171200Z - 181200Z

...Synopsis...
Zonal flow will persist across the Pacific Northwest during the Day
2/Tuesday period. At the surface, a thermal low will develop east of
the Cascades. Mid-level moisture attributed to the monsoon will also
hover over the Great Basin into the Pacific Northwest.

...Central/eastern Washington and Oregon...
A very hot surface airmass is expected to develop east of the
Cascades during the afternoon on Day 2/Tuesday, promoting the
development of a thermal low/trough. A weak pressure gradient will
result from the trough, inducing downslope flow to the lee of the
Cascades. Surface winds are expected to reach up to 15-20 mph during
the late afternoon in the presence of 100 F temperatures and 10-15%
RH. With receptive fuels present, an elevated delineation was made
where windy and hot/dry conditions may support an environment
favorable for fire spread. 

...Idaho/Montana border into far west Wyoming...
Isolated thunderstorms are expected to develop along the periphery
of greater mid-level moisture associated with the monsoon. An
isolated dry thunderstorm delineation was added where the greatest
confidence in dry strikes would be, in addition to faster storm
motions due to a belt of stronger mid-level flow embedded within the
larger scale zonal pattern. Fuels have also become at least
marginally receptive to fire spread.

..Squitieri.. 07/16/2018

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

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