Fire Weather Outlook Discussion
Issued by NWS
Issued by NWS
410 FNUS21 KWNS 020659 FWDDY1 Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0158 AM CDT Sat Aug 02 2025 Valid 021200Z - 031200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/SOUTHEASTERN UTAH INTO NORTHWESTERN COLORADO... ...Synopsis... Along the northern periphery of a large-scale ridge centered on the Southwest/northern Mexico, a westerly midlevel jet streak will overspread the southern/eastern Great Basin. In response, a weak surface low will develop over eastern UT, resulting in a tightening pressure gradient across the area. ...Southern/eastern UT into northwest CO... Diurnal heating will result in a deeply mixed boundary layer across the southern/eastern Great Basin, where widespread single-digit RH is expected during the afternoon. Boundary-layer mixing into the strengthening flow aloft, coupled with an enhanced pressure gradient, will yield 20 mph west-southwesterly surface wind from southern/eastern UT into northwest CO. The combination of breezy surface winds and low RH will favor critical fire-weather conditions, given receptive fuels across the region. ...Dry Thunderstorms - Intermountain West... Diurnally driven high-based thunderstorms are expected across the Intermountain West, aided by weak large-scale forcing for ascent ahead of a deamplifying midlevel trough. Around 0.7 inch PW and a deep/dry boundary layer will support mostly dry thunderstorms, capable of lightning-induced ignitions over any receptive fuels. ..Weinman.. 08/02/2025 ...Please see www.spc.noaa.gov/fire for graphic product... $$