Alta Sierra At Shirley Meadows Snow Report

146 FXUS65 KVEF 150705 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 1205 AM PDT Sat Aug 15 2026 .KEY MESSAGES... * Thunderstorm chances will continue today across portions of Lincoln, Clark and northern Mohave counties before drier air moves in for the second half of the weekend, with dry conditions continuing into the upcoming work week. * Temperatures will steadily warm through the first half of the forecast period, with areas of Moderate HeatRisk developing by midweek. && .DISCUSSION... Another day of scattered thunderstorms is expected today, although coverage should be more limited than what was seen Friday. Monsoonal moisture will remain in place across southern Nevada, northwest Arizona, and the western Mojave Desert, although moisture levels will be on a downward trend as a trough off the Southern California coast results in drier southwest flow aloft and the ridge to the east nudges into the region. The best chances of storms today will be across Clark, Mohave, and Lincoln counties, with activity favoring the higher terrain in these areas. While localized pockets of heavy rainfall will be possible, the flash flood risk should be more limited given the expected reduction in storm coverage and moisture levels. By Sunday, storm chances will be limited to the higher peaks as drier air continues to spread across the region. The high-pressure ridge will remain in place through much of the upcoming week, keeping the region dry. Some long-range ensembles indicate the ridge could shift back to the east by late next week, possibly allowing for the return of monsoonal flow, but significant uncertainty remains regarding how this pattern will evolve. By Sunday, as the ridge continues to build into the area, temperatures will warm back into the 100s in the Las Vegas Valley and near 110F in some of the lower desert valleys. This warming trend will continue through the first half of the week, with readings in Las Vegas reaching the mid-100s (105F to 108F) and the lower desert valleys reaching the mid-110s. HeatRisk values will increase to Moderate (level 2 of 5) in some areas by midweek, with isolated areas of Major (level 3 of 5) by the end of the week. If we are able to get a return of monsoonal moisture later in the week, temperatures may be moderated somewhat. && .AVIATION...For Harry Reid...For the 06Z Forecast Package... Thunderstorms will become more isolated across the region this evening and gradually dissipate around 08z. The greatest concentration of storms will impact the Peach Spring corridor where strong gusty outflow winds and frequent lightning remain. Winds will generally be east to southeast around 10 knots, but gusty outflow winds still have the potential to bring variable and gusty winds through 08z. Overnight, winds are expected to become light and variable with SCT-BKN clouds 10-15kft. Thunderstorms are expected to redevelop Saturday from late morning through the afternoon with a higher probability of storms occurring in the valley. Any storm could produce strong outflow winds, lightning, and heavy rain. Temperatures are expected to remain below 100F through the weekend. For the rest of southern Nevada, northwest Arizona and southeast California...For the 06Z Forecast Package...Thunderstorms will persist across southern Nevada and northwest Arizona through 08z before diminishing, this includes the Las Vegas Valley TAF sites along with KIFP. CIGs between 8-10kft along with gusty outflow winds to 25 knots are possible. Winds will generally be less than 10 knots for most TAF sites with the exception of KDAG where gusts to 20 knots are possible through 08z. KBIH will see generally clear skies with northwest winds around 8 knots. Thunderstorms are expected to redevelop Saturday from late morning through the afternoon over southern Nevada and northwest Arizona. Any storm could produce strong outflow winds, lightning, and heavy rain. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Planz AVIATION...Gorelow For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter