784 FXUS65 KSLC 252135 AFDSLC Area Forecast Discussion National Weather Service Salt Lake City UT 335 PM MDT Fri Jul 25 2025 .SYNOPSIS...Critical fire weather conditions due to gusty winds and low relative humidity will affect much of Utah Saturday. Smoke, primarily from a wildfire in northern Arizona, will continue to track into southern and eastern portions of Utah through the weekend. && .SHORT TERM (Through 12Z/6AM Sunday)...A southwest synoptic flow is in place throughout southwest Wyoming and Utah. This is primarily due to a weak shortwave trough near San Francisco and Oakland, CA. A powerful ridge of high pressure from the southeast U.S. into the plains is also contributing. This has advected very dry conditions in, with relative humidity in the single digits throughout most of southwest Wyoming and Utah. Although with that are gusts in excess of 20 mph. The southwest winds have advected wildfire smoke from the Dragon Bravo fire in northern Arizona into southeast Utah. The dense smoke will continue for this portion of Utah as southwest flow lasts through the weekend. Relative humidity will be similar Saturday, while winds will increase as the shortwave trough to the west lifts northeast. This will add roughly 5-10 mph on top of the gusts from Friday. The strongest winds will be in southwest Wyoming and roughly the southern half of Utah, with gusts around 30 mph. The combination will result in critical fire weather conditions. While the lifting trough will be out of the area Sunday, southwest synoptic flow will continue with similar single digit minimum relative humidity. Winds will be slightly lighter than Saturday, but higher fire danger will continue. .LONG TERM (After 12Z/6AM Sunday)...There is about a 50/50 split in the ensemble system members between increasing mid-level moisture reaching Utah by Tuesday, versus largely shunting any substantial moisture increase to the east into Colorado. Something to continue to monitor as a longer duration without precipitation would worsen drought and fire conditions. && .AVIATION...SLC...VFR conditions prevail through the TAF period. Winds remain breezy out of the south this afternoon, clocking more southwesterly after 23z. Winds are expected to become light as they transition to a typical southeasterly wind after 04z. Increasing southwesterly flow aloft overnight is expected to bring increased concentrations of vertically-integrated smoke to the area between roughly 08-16z. This may yield some hazy skies and perhaps a degradation in slantwise visibility. .REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions expected at all regional terminals through the remainder of the period. Wildfire smoke from the Monroe Canyon and Dragon Bravo fires will continue to impact the airspace. Increased concentrations vertically-integrated smoke are expected mainly along and east of the I-15 corridor overnight into Saturday morning as southwesterly flow aloft increases. Surface smoke concentrations will be highest across southeast Utah, with VIS and CIG reductions to MVFR/IFR possible this afternoon and evening in the vicinity of Lake Powell. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...Red Flag Warning from noon to 9 PM MDT Saturday for UTZ481>484- 489-492>496-498. WY...Fire Weather Watch from Saturday afternoon through Saturday evening for WYZ277. && $$ SHORT TERM...Wilson LONG TERM...Kruse AVIATION...Whitlam FIRE WEATHER...Wilson For more information from NOAA`s National Weather Service visit... http://weather.gov/saltlakecity