215 FXUS65 KVEF 252201 AFDVEF Area Forecast Discussion National Weather Service Las Vegas NV 301 PM PDT Fri Jul 25 2025 .KEY MESSAGES... * Temperatures will remain below normal throughout the weekend before a slow warm-up begins early next week. * Moisture levels will remain low through the weekend, keeping most of the area dry. A slight uptick in monsoonal moisture across Arizona next week will bring some precipitation chances to eastern Mohave County by mid-week. && .DISCUSSION...through Thursday. A closed 500mb low off the central California Coast continues to move off to the east-northeast early this afternoon. Over the weekend, the low will weaken and be absorbed into larger-scale troughing across the western US. The main impact for our CWA will be a continuation of lower-than-normal heights, which in turn will keep temperatures several degrees below normal in most areas through Sunday. Once the low is absorbed, heights and temperatures will increase slightly, although readings are only expected to return to near seasonable norms by early next week. Long-range ensemble guidance indicates the possibility of another upper-level low developing along the central California Coast by next weekend, which should help keep temperatures in check across our area. With the large-scale trough in place across the west, most of the CWA will remain in dry southwest flow, limiting, but not eliminating, precipitation chances. With the low moving across central California today and tomorrow, isolated thunderstorms will be possible in the higher elevations of the Sierra, generally north of Mt. Whitney. Any storms that do develop are expected to remain over the mountains and not directly impact the Owens Valley. Later in the week, strong high pressure over the central plains will spread west, allowing an increase in monsoonal flow across Arizona. Most of the increased moisture will remain east of the CWA, but PWAT values will increase to .70" to .80" across far southern and eastern Mohave County by Tuesday, leading to increased chances of thunderstorms in these areas. Currently, the chance of precipitation in the Las Vegas Valley is minimal; however, the exact progression of the high next week will determine how far west the precipitation eventually spreads. && .AVIATION...For Harry Reid...For the 00Z Forecast Package...Breezy southwest winds with occasional gusts will continue until around sunset before ending. Winds will likely become light and variable for a period late tonight through mid-morning tomorrow, before becoming breezy again from the south to southwest by tomorrow afternoon. Other than FEW to SCT clouds AOA 15kft AGL late this afternoon and early evening, mainly clear skies are expected. For the rest of southern Nevada, northwest Arizona and southeast California...For the 00Z Forecast Package...Southerly breezes with occasional gusts are expected at most regional TAF sites into this evening. The exception will be KDAG, where winds will remain more westerly. Most areas will see gusts ranging from 15 to 25 knots, although a few isolated gusts to 30 knots will be possible mainly across the Owens Valley and western Mojave Desert. Similar wind conditions are expected in all areas tomorrow. VFR conditions will prevail through Saturday, although a few isolated afternoon thundershowers will be possible along the Sierra into this evening and again tomorrow afternoon. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && $$ DISCUSSION...Planz AVIATION...Planz For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter