376 FXUS65 KVEF 221134 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 434 AM PDT Sun Jun 22 2025 .KEY MESSAGES... * Dry conditions will continue through the end of the week for southern Nevada, northwest Arizona, and southeast California. * Today will be the coolest day of the week, with temperatures gradually rebounding throughout the week. && .DISCUSSION...through next weekend. As the trough responsible for yesterday`s winds lifts into the Northern Rockies a shortwave will slip in behind it, reinforcing the general troughiness across the Southwestern US. As a result of this synoptic setup, we will continue to find ourselves under dry southwesterly flow aloft with dry conditions expected to continue through the end of the week. While we will continue to see afternoon relative humidity values bottom out in the single digits and lower teens, winds will not be as strong, which will help to mitigate fire danger. Today`s high temperatures across the region will be around 10+ degrees cooler than normal. Temperatures will gradually climb back up to near normal by mid week as 500 mb heights increase thanks to a ridge trying to push into the area. Warmer than normal temperatures will return to the region during the second half of the week, resulting in increasing HeatRisk as we head into the weekend. Widespread Moderate (Level 2 of 4) HeatRisk is expected across southern Nevada, southeastern California, and northwestern Arizona over the weekend. This level of heat will impact anyone without effective cooling and/or adequate hydration as well as heat sensitive individuals and those that have not acclimated to these temperatures. && .AVIATION...For Harry Reid...For the 12Z Forecast Package...Gusty northwest winds with a few gusts to 30 knots are expected through 14Z, then decreasing to less than 12 knots by late morning as they gradually veer around to the northeast. Winds are then expected to remain less than 8 knots through the afternoon as directions continue to veer around to the southeast and eventually southwest by sunset. Typical southwest drainage winds are expected after sunset into Monday morning. No operationally significant cloud cover is forecast, although smoke from wildfires north of the region may result in murky skies at times. For the rest of southern Nevada, northwest Arizona and southeast California...For the 12Z Forecast Package...Conditions at the Las Vegas area TAF sites will be similar to those described above for Harry Reid. Elsewhere across the region, breezy northerly winds this morning are expected to diminish by afternoon. A more typical diurnal wind pattern will then reestablish itself by this evening, with most sites expecting winds to remain 12 knots or less overnight into Monday. No operationally significant cloud cover is forecast, although smoke from wildfires north of the region may result in murky skies at times, especially in the Owens Valley and areas north of the Las Vegas Valley. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Stessman AVIATION...Planz For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter