Note: Fire weather probabilistic information in
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.
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ZCZC SPCFWDD38 ALL
FNUS28 KWNS 202038
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0338 PM CDT Tue Aug 20 2019
Valid 221200Z - 281200Z
...D3/Thu - Portions of the Great Basin into the Northern Rockies...
A fast-moving, mid-level trough will move through the Northwest and
into the Northern Rockies on Thursday. This trough will strengthen
mid-level flow somewhat across the Great Basin and northern Rockies.
Where a dry, deeply mixed boundary layer is expected across most of
the Great Basin, winds should strengthen into the 15 to 20 mph range
with relative humidity around 10 to 15 percent. Therefore, 40%
critical probabilities have been included across a broad portion of
this region to cover the threat.
In addition, these conditions are also expected in the Snake River
Valley, but lighter winds and more moist conditions are expected
between this area and the fire weather concerns in northern Utah and
southwest Wyoming. Therefore, a separate 40% area has been added for
the Snake River Valley.
...D5/6-Sat/Sun - Northern Great Basin into far northern Colorado
and southern Wyoming...
A strong upper-level jet is expected to overspread the Pacific
Northwest and northern Rockies on Saturday and Sunday. Much of the
Pacific Northwest and northern Rockies will be cool and moist enough
to avoid the primary fire weather concerns, but strong winds are
expected to develop in the dry areas from northeast Nevada eastward
into southeast Wyoming. There are still some uncertainties regarding
the amplitude of the trough which preclude higher critical
probabilities, but there is enough consistency between model
solutions to warrant a 40% probability on both days.
...Please see www.spc.noaa.gov/fire for graphic product...
CLICK TO GET FNUS38 KWNS PFWF38 FIRE WEATHER OUTLOOK DAY 3-8 AREAL OUTLINE PRODUCT