343
FNUS28 KWNS 082157
FWDD38

Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0455 PM CDT Mon Jun 08 2026

Valid 101200Z - 161200Z

...Synopsis...
A large scale upper trough will gradually shift eastward from the
Northern Rockies on Day 3/Wednesday into the Great Lakes by Day
5/Friday. A troughing pattern will likely remain entrenched across
Ontario Canada and northeastern U.S. with another possible short
wave pushing southeastward into the Northern Rockies early next
week. The departing trough and accompanying stronger mid-level flow
will subdue broader fire weather concerns across the West later this
week as the amplifying ridge promotes a warming and drying trend
across the region.

...Day 3-5/Wednesday-Friday...
...Eastern Great Basin, Colorado Plateau and central High Plains...
Stronger westerly surface winds in the wake of a cold front below a
pronounced 80-90 knot mid-level jet, will likely bring an enhanced
fire weather concern to portions of southeastern WY and western NE
Panhandle on Day 3/Wednesday. 70% critical probabilities have been
introduced where west winds of 25-30 mph and RH as low as 15% align
with pockets of dry fuels. Weaker but still impactful westerly flow
will bring a fire weather concern to much of the eastern Great
Basin, Colorado Plateau and Four corners regions where 40%
probabilities remain. The broader fire weather threat contracts
towards the Four Corners and adjacent southern CO Rockies by Days
4-5/Thursday-Friday as influence from the departing upper trough and
surface pressure features begins to wane.

...Sacramento Valley...
Dry, post-frontal northerly flow funneling into the Sacramento
Valley will likely promote an enhanced fire weather threat for this
region and adjacent valley foothills beginning Day 3/Wednesday,
lingering into Day 4/Thursday. North winds of 10 to locally 20 mph,
RH at or below 15% are expected to combine with receptive fuels to
support fire spread. 40% critical probabilities were added for Day
4/Thursday accounting for latest model guidance and duration of
event.

...Day 6/Saturday...
...Northern Arizona and Southern Utah...
A weak upper trough west of Baja Peninsula will aid in northward
transport of deeper Pacific moisture from Tropical Storm Boris
through the week, reaching the lower desert areas of the Southwest
as early as Day 5/Friday. Precipitable water values of one inch or
more should stay south of the Mogollon Rim region through the
weekend. A dry thunderstorm concern will likely exist on the fringes
of the deeper moisture across northern AZ into southern UT. A 10%
probability dry thunderstorm area was introduced, although some
modifications may be needed in subsequent outlooks as forecast
certainty increases.

..Williams.. 06/08/2026

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

$$