144
FNUS21 KWNS 111648
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1148 AM CDT Tue Jun 11 2024

Valid 111700Z - 121200Z

...Update...
Increasing mid-level flow is expected over the Pacific Northwest
this afternoon, while surface pressure falls accompany a mid to
upper-level shortwave trough over British Columbia. The resulting
pressure gradient, and momentum transfer from aloft, will yield
sustained westerly drying downslope winds around 20-25 mph with
gusts near 40 mph east of the Cascades. Minimum RH will drop to
25-30 percent late this afternoon. Although widespread fuels appear
marginal, a couple of wildfires were already reported yesterday
across this region, and more receptive fuels are likely present near
and north of the OR/WA border. Therefore, an Elevated area has been
included for central WA and far northern OR today. For the rest of
the CONUS, the forecast remains valid. Please see the previous
discussion from below.

..Barnes.. 06/11/2024

.PREV DISCUSSION... /ISSUED 0156 AM CDT Tue Jun 11 2024/

...Synopsis...
A belt of strong westerly midlevel flow will overspread the Pacific
Northwest, while a related cold front moves eastward across the
region. This will favor downslope warming/drying and a tightening
surface pressure gradient east of the Cascades. As a result, locally
dry/breezy conditions are expected across portions of eastern WA and
OR, and locally elevated fire-weather conditions are possible.
However, marginal fuels limit confidence in an appreciable
fire-weather threat -- precluding Elevated highlights at this time.

Over the Southwest, warm/dry conditions will continue beneath a
midlevel ridge. While locally elevated fire-weather conditions are
possible (given dry fuels across the region), a modest surface
pressure gradient and fairly weak surface winds should limit the
overall fire-weather threat.

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

$$