Storm Prediction Center Day 2 Fire Weather Outlook
Created: Fri Jun 22 06:55:03 UTC 2018 (
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Storm Prediction Center Day 2 Fire Weather Outlook
Created: Fri Jun 22 06:55:03 UTC 2018 (
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Click for Day 2 FireWX Areal Outline Product (KWNSPFWFD2)
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 220654
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0154 AM CDT Fri Jun 22 2018
Valid 231200Z - 241200Z
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE GREAT BASIN INTO
NORTHWEST ARIZONA...
...Synopsis...
An upper-level trough will dig into the Great Basin on D2/Saturday.
Strong mid-level flow will mix down to the surface as well-mixed
boundary layers deepen over the course of the day. At the surface, a
trough will develop in response the upper-level wave and enhance the
surface winds further. A similar scenario will unfold in northern
California, where strong northerly/northwesterly flow on the back
side of the trough -- coupled with a surface trough -- will yield
strong surface winds. Strong surface winds will overlap with
critically low RH across the highlighted areas.
...Portions of the Great Basin into northwest Arizona...
Strong mid-level flow will mix down to the surface in the afternoon
with already enhanced surface due to a surface trough in the Great
Basin. Surface winds will range from 20-25 mph with RH values
dipping to 5-15%. Small southward extension of the critical area was
made into Arizona on account of recent stronger wind guidance.
Elsewhere, a surrounding area of elevated fire weather conditions
will exist across much of New Mexico, western Colorado, and portions
of Utah and Nevada. These locations will experience RH values 5-15%,
however winds will not reach critical levels with their displacement
from the stronger mid-level flow.
...Northern California...
Elevated to locally critical fire weather conditions will exist in
parts of the Sacramento Valley. Strong mid-level winds accompanied
by a strong surface pressure gradient will yield winds in the 15-20
mph range. RH values will fall to 5-15% with the downsloping
northerly/northwesterly flow. Critical winds will likely be too
localized to warrant critical designation.
..Wendt.. 06/22/2018
...Please see www.spc.noaa.gov/fire for graphic product...