FNUS21 KWNS 140716

Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0215 AM CDT Wed Apr 14 2021

Valid 141200Z - 151200Z


Mid-level troughs and associated surface lows/lee troughs are
expected to propagate across the Interior West and to the lee of the
Appalachians along the East Coast today, promoting favorable
wildfire-spread conditions across portions of the Lower Colorado
River Valley and Central Savannah River area. Across the Southwest
U.S., wildfire-spread concerns are greatest in the low-terrain
areas, where fuels are most receptive to fire spread.

...Lower Colorado River Valley...
A belt of 60+ kt mid-level flow is expected to overspread the Four
Corners region by afternoon peak heating, when boundary-layer mixing
is projected to be strongest. The optimal timing of the
overspreading mid-level winds and associated downward momentum
transport within the dry boundary layer suggests that widespread 20+
mph sustained southwesterly surface winds are likely across much of
the Southwest in tandem with 10-20% RH. Critical highlights have
been introduced where 25+ mph sustained winds and 10-15% RH are
likely to overlap for at least a few hours, with at least locally
Critical conditions possible through the remainder of the Elevated
area. Brief, localized Extremely Critical meteorological conditions
are also possible close to the Kaibab Plateau towards the Black Mesa
and Chuska Mountains. 
...Portions of the Southeast...
Afternoon boundary-layer mixing across portions of eastern Georgia
into South Carolina is expected to foster 25-35% surface RH values,
while a passing surface lee trough will encourage 10-15 mph
sustained southwesterly winds (perhaps with higher gusts). Since the
favorable overlapping surface winds/RH are expected to overspread
dry fuels across the region, Elevated fire weather highlights have
been maintained across the region.

..Squitieri.. 04/14/2021

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