Area Forecast Discussion
Issued by NWS Salt Lake City, UT
Issued by NWS Salt Lake City, UT
896 FXUS65 KSLC 232043 AFDSLC Area Forecast Discussion National Weather Service Salt Lake City UT 243 PM MDT Mon Sep 23 2024 .SYNOPSIS...High pressure will bring above normal temperatures, relatively light winds, and very low precipitation chances to the Great Basin through at least the next week. && .SHORT TERM (Through 12Z/6AM Thursday)...High pressure begins building today over the Great Basin. Temperatures will increase Tuesday and Wednesday and will be close to daily record highs by Wednesday. High temperatures on Wednesday will be aided by a slight increase in southwesterly winds ahead of an upper-level trough moving into the Pacific Northwest. This trough will lift northeast into Canada on Thursday with no other impacts in Utah and southwest Wyoming. .LONG TERM (After 12Z/6AM Thursday)...Temperatures will remain above normal from Thursday until at least Sunday, with valley temperatures in the upper 80s and 90s region-wide, as high pressure remains dominant over the Great Basin. Sunday is the latest day that 90F has been recorded in Salt Lake City (in 1957 and 2011) and there is currently a 25% chance we get to 90F on that day. Beyond Sunday, ensemble forecasts indicate that it is very likely (80% chance) that the unusually dry, warm and low wind conditions of this week will persist through at least Thursday 10/3. && .AVIATION...KSLC...VFR conditions will prevail throughout the period. Northwesterly winds will persist through 03Z before switching back to the southeast. .REST OF UTAH AND SOUTHWEST WYOMING...Mainly clear skies will be the rule across most of Utah and southwest Wyoming through tonight. Northern Utah may see a bit of a northerly gradient through this evening, otherwise terrain driven winds can be expected through the TAF period. && .FIRE WEATHER...High pressure along the Pacific Coast is maintaining a dry and mild northwesterly flow across the Great Basin this afternoon. This high will move overhead Tuesday, bringing a slight warming trend, along with light, terrain driven winds. As the high moves east Wednesday, southwesterly flow will bring a more substantial warming and drying trend Wednesday with temperatures nearly 10 degrees above normal across the area, and daytime RH falling below 15% across most valleys and diminished overnight RH recovery. This warm and dry airmass will remain in place through the upcoming weekend, with no chance for rain over the next 7 days. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...None. WY...None. && $$ Jeglum/Seaman For more information from NOAA`s National Weather Service visit... http://weather.gov/saltlakecity