FXUS65 KVEF 222155 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 255 PM PDT Sat Aug 22 2026 .KEY MESSAGES... * Above normal temperatures continue through next week. * Isolated storm chances linger into early next week, with best chances in northwestern Arizona and the southern Great Basin. && .DISCUSSION...through Friday. Hotter than normal temperatures will continue through the forecast period as a broad ridge of high pressure remains positioned over the area. High temperatures will top out around 2 to 7 degrees above normal each afternoon, with day to day variations depending on the position of the ridge, cloud cover, moisture, etc. Overnight low temperatures will run around 3 to 8 degrees warmer than normal, providing little-to-no overnight relief in the lower elevations of the Mojave Desert where temperatures will bottom out in the mid-80s to mid-90s. Given the long duration of this anomalous heat, we will see widespread Major-to-Extreme (Levels 3 and 4 of 4, respectively) HeatRisk return during the second half of the week. Southwesterly flow aloft will continue to dry things out, with precipitable water slowly decreasing across the region over the weekend. As a result, storm coverage today and tomorrow will be more isolated in nature, and will be limited to the higher terrain of the Southern Great Basin, Eastern Sierra, and the Arizona Strip where there is a 10 to 30% chance of precipitation this afternoon. Localized moderate-to-heavy rain, lightning, and erratic outflow winds will be the primary threats with any storms that develop. Ensemble guidance continues to show a relative uptick in moisture across northwestern Arizona on Monday. Currently, this slight increase in moisture is reflected in the scattered 15 to 30% rain chances in Mohave County on Monday afternoon. Drying will resume on Tuesday, continuing through the end of the week as we find ourselves under southwesterly flow aloft. && .AVIATION...For Harry Reid...For the 18Z Forecast Package...Southeast winds around 8KT are expected into the early afternoon. Isolated gusts to 15KT are possible with the southeast winds. Around 21Z, winds will become south as gusts over 15KT become more frequent. Winds will diminish this evening around sunset with typical overnight wind patterns through Sunday morning. Similar winds to today are expected Sunday with as southeast winds in the morning become south with gusts to around 20KT in the afternoon. Isolated showers and thunderstorms will develop across the Southern Great Basin this afternoon but are expected to stay far away from the terminals and no local impacts are expected. Temperatures will exceed 100F through 04Z this evening, then again Sunday between 18Z and 04Z. For the rest of southern Nevada, northwest Arizona and southeast California...For the 18Z Forecast Package...Increasing south to southeast winds are expected this afternoon in many locations, gusting 15-20KT at times. West to southwest winds will push into KDAG around 00Z and start gusting over 20KT. Winds will diminish around sunset and follow typical wind patterns overnight. Isolated showers and thunderstorms will develop this afternoon across the Southern Great Basin as well as in the Sierra, will need to watch if anything develops close enough to KBIH that it would impact the airport but currently do not think this will occur. Any precipitation does develop will diminish this evening with a dry night expected. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Stessman AVIATION...Nickerson For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter