076 FXUS65 KVEF 090927 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 227 AM PDT Fri Jun 9 2023 .SYNOPSIS...Isolated afternoon showers and thunderstorms will remain probable across the Sierra and Southern Great Basin through Saturday. A weather system moving in Sunday will spread breezy conditions through the area and drag shower chances into the western Mojave Desert...along with well below normal temperatures. A gradual warming and drying trend is expected next week. && .SHORT TERM...through Saturday night. We'll be in between weather systems today as a weak trough lifts north across the Great Basin ahead of another closed low set to move into southern California by Saturday. This active pattern will keep isolated shower chances going, mainly across the Sierra and Southern Great Basin both Friday and Saturday afternoons. Otherwise, with continued below normal heights, afternoon highs will remain several degrees below normal. Increasing mid and high clouds ahead of Saturdays weather system will also begin to move in this evening and overspread the entire region by Saturday morning and linger through Saturday evening. Afternoon breezes will pick up as well on Saturday, but don't appear especially strong given relatively weak pressure gradients in play. .LONG TERM...Sunday through Friday. Still expecting low pressure to be over southern California Sunday, then drift slowly northeast across southern Nevada into Utah by Tuesday. This will bring chances for showers and thunderstorms, with the highest chances on Sunday in higher terrain areas from the Sierra Nevada to near Las Vegas, decreasing Monday and Tuesday as the low pulls away. Another slug of vorticity is forecast to dig southward well west of the low on Monday, maintaining the mean trough extending from the Desert Southwest out into the eastern Pacific Ocean. However, in a change from recent times, the trough is forecast to weaken slowly through the rest of the week, allowing heights to rise and temperatures to follow suit. Temperatures should be well below mid June normals Sunday and Monday, then quickly increase to near normal by Wednesday. The first 100 degree day of the season at KLAS is still an underdog through the period, but chances increase to about 20% Thursday and Friday. && .AVIATION...For Harry Reid...Light and variable winds this morning will become predominately south-southeasterly by early afternoon. Wind speeds will generally be less than 10kts into the late afternoon, with only a slight chance (less than 20%) of seeing wind gusts to 15kts through sunset. Winds will turn more to the southwest after sunset and increase slightly to 8-12kts through midnight before becoming light and variable overnight and early Saturday morning. Otherwise, VFR conditions will prevail through the evening with FEW-SCT cigs AOA 10kft, followed by increasing high clouds overnight into Saturday morning. For the rest of southern Nevada, northwest Arizona and southeast California...Winds in most areas will be south to southwest, with speeds generally 15kts or less. The exception will be the lower Colorado River Valley, where winds could gust up to 20kts late this afternoon and evening. A few scattered showers and embedded thunderstorms will be possible again this afternoon across far northern areas, and localized gusty outflow winds and convective turbulence will be possible near this activity. Otherwise, VFR conditions will prevail through the afternoon with FEW-SCT cigs AOA 10kft, followed by increasing high clouds west to east overnight into Saturday morning. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ SHORT TERM...Outler LONG TERM...Morgan AVIATION...Planz For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter