Area Forecast Discussion
Issued by NWS Salt Lake City, UT
Issued by NWS Salt Lake City, UT
179 FXUS65 KSLC 192151 AFDSLC Area Forecast Discussion National Weather Service Salt Lake City UT 351 PM MDT Sat Apr 19 2025 .SYNOPSIS...Utah and southwest Wyoming will see mostly dry conditions and a general warming trend over the next several days. A series of weak storm systems grazing northern Utah tonight, Monday, and Wednesday will bring some increased clouds and may temporarily curb the warming trend. && .SHORT TERM (Through 12Z/6AM Monday)...Shortwave ridging has moved over Utah and southwest Wyoming this afternoon in the wake of the exiting trough. Temperatures have warmed noticeably compared to yesterday but remain on the cool side, averaging 5F below seasonal normals under clear skies. Clouds are expected to increase over northern Utah tonight into tomorrow morning as a very weak shortwave grazes the area. Anticipating little if any precipitation with this passage, but it would bring a low chance of showers to areas near the Utah/Idaho border overnight. Shortwave ridging looks to be on track to return by the afternoon, however, as clouds diminish, allowing for maxes averaging around 5F above seasonal normals. .LONG TERM (After 12Z/6AM Monday)...A weak baroclinic zone will bring showers through early Monday for southwest Wyoming and northern Utah. Most of the showers will be light and scattered, primarily for the northern mountains. The associated trough will stay to the north and track east through Monday, so the cold front will lift through the afternoon. Showers will taper off as the cold front lifts. Snow accumulation of 1-3 inches is likely for much of the northern mountains. Zonal flow will last through Tuesday with dry conditions. Temperatures will warm throughout southwest Wyoming and Utah, with valley highs from the upper 60s to mid 70s. A shortwave trough will slide into northern Utah Wednesday, bringing scattered showers to southwest Wyoming and northern Utah. West to southwest flow will bring warmer conditions and snow levels around 8000 feet. The shortwave will not bring much precipitation, with mountain snow accumulations around an inch or less. There is good agreement that a longwave trough will slide into the eastern Pacific Thursday, which will enhance southwest flow. Within that, there will be shortwave energy and upper diffluence for showers for southwest Wyoming and northern Utah. Most showers will be in the northern mountains, with snow levels around 9000 feet and light accumulations. Southwest winds throughout southern Utah will gust in excess of 30 mph. Temperatures will climb into the 70s and 80s for valleys, almost 15F warmer than normal. There are a range of scenarios for how the longwave trough will track inland, but it is likely that southwest winds will enhance further northward Friday. Gusts will likely exceed 35 mph in southern Utah and 30 mph in southwest Wyoming and northern Utah, with scattered showers, primarily for the northern mountains. && .AVIATION...KSLC...VFR conditions with typical light, diurnal wind shifts expected. Northwest winds will become southeast again after around 03Z this evening, then back to the northwest again around 18Z on Sunday. .REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions will prevail across the area through the TAF period. Generally northerly winds this afternoon will relax and become light and terrain driven through the day on Sunday. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && $$ SHORT TERM...Traphagan LONG TERM...Wilson AVIATION...Church For more information from NOAA`s National Weather Service visit... http://weather.gov/saltlakecity