FXUS65 KCYS 241933 AFDCYS Area Forecast Discussion National Weather Service Cheyenne WY 133 PM MDT Fri Oct 24 2025 .KEY MESSAGES... - Mild and mostly dry conditions continue into the weekend. Winds will begin to increase across southeast Wyoming on Saturday. - Pattern change expected Sunday night into Monday with the potential for colder temperatures, rain and snow, and windy conditions. - Locally strong winds possible for the wind prone areas of southeast Wyoming Sunday night and Monday. && .SHORT TERM /THROUGH SATURDAY NIGHT/... Issued at 131 PM MDT Fri Oct 24 2025 Visible satellite imagery currently shows a bright and sunny day across southeast Wyoming and western Nebraska. The only clouds in the CWA remain over the high terrain where increased moisture exists from a system over the Four Corners region. Clear skies will continue through the afternoon and into the overnight hours. Another chilly overnight is likely due to calm conditions and clear skies. Effective radiational cooling will quickly lower temperatures, therefore went ahead and decreased overnight/Saturday morning low temperatures below the NBM. An even warmer day is expected Saturday as the upper-level ridge axis slides eastward, advecting warmer and drier air into the CWA. 700 mb temperatures will be around the 90th percentile for NAEFS climatology, so high temperatures will be about 10 degrees above average for late October. Areas east of the Laramie Range can expect high temperatures to range from the mid 60s to mid 70s, while the low 60s are expected for areas out west. Unlike the last few days, breezier conditions can be expected Saturday ahead of the next Pacific cold front. Along with the wind, increasing clouds can be expected from west to east during the evening and overnight hours as the cold front creeps closer to the CWA. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Issued at 131 PM MDT Fri Oct 24 2025 An upper level low pushes into the Pacific Northwest Sunday and moves along the Canadian Providences. This low pressure system will send a cold front through the Intermountain West, late Sunday morning and into the early afternoon. This will begin our precipitation chances for light rain that will turn to a rain snow mix by the evening and eventually turning to all snow overnight West of the I-25 corridor. Looking east of the I-25 corridor temperatures are forecasted to be warm enough that any precipitation falling will likely stay as rain. However, due to the progged westerly downslope flow most of the precipitation will struggle to make it to the surface resulting in small accumulations from any showers overhead Sunday and Monday. Also due to our downsloping westerly winds, it also looks to be fairly breezy in our wind prone and wind prone adjacent areas during this time as well. Our in house wind algorithm shows Monday as having the highest probability of meeting high wind criteria, but not quite sure if the jet will be strong enough to create winds that will mix down and give us those 60 mph gusts. Tuesday the upper level low will be far enough east that our precipitation chances will end. Following the upper level trough, another ridge looks to set up over the Intermountain west to keep us dry for the rest of the work week. && .AVIATION /18Z TAFS THROUGH 18Z SATURDAY/... Issued at 1112 AM MDT Fri Oct 24 2025 Upper level ridge will keep winds relatively light (5 knots or less) and somewhat variable this afternoon and overnight. Tomorrow the winds will pick up in the morning with gusts around 20 knots expected after 15z. VFR Conditions are expected for the duration of the TAF period. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...None. NE...None. && $$ SHORT TERM...SF LONG TERM...MM AVIATION...MM