108 FNUS21 KWNS 140716 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0215 AM CDT Wed Apr 14 2021 Valid 141200Z - 151200Z ...CRITICAL FIRE WEATHER AREA FOR NORTHEAST ARIZONA INTO NORTHWEST NEW MEXICO... ...Synopsis... 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... $$
