Las Vegas is in for a weather change later this week, according to the National Weather Service. Today and Tuesday will stay warm with above-average temperatures, similar to Sunday. But by the weekend, several weather systems will combine, bringing an end to the recent stretch of clear, warm days.
By Wednesday, the dance begins with a shortwave dropping south from western Canada to meet a cutoff low arriving onshore near Point Conception. This meteorological partnership is projected to amass moisture and usher in scattered showers and isolated storms, particularly across the Great Basin and Sierra regions. "A single, closed low over the Great Basin and Mojave Desert," as described by the NWS, is expected on Thursday and Friday, seemingly merging the elements to spread precipitation further south. Vegas should be ready to wave goodbye to the sunny 90-degree days, in favor of what could be a 15-degree drop below normal come Friday.
Gusty winds and cooler temperatures are set to be the secondary, yet significant, features of this late-week shakeup. Precipitation probabilities bounce between 30-50%, with thunderstorms being a distinct possibility. Even snowy conditions aren't off the table, with the Sierra and Spring Mountains looking at a 50% chance of 4 inches or more, a rarity for the season. "Forecast highs across the area go from 75-90 degrees on Wednesday to 55-75 degrees on Friday," the National Weather Service stated.
The winds, strongest on Wednesday and Thursday, are likely to lessen as the week concludes. By the weekend, as the low-pressure system pushes eastward, expect a gradual return to the usual warmth Vegas is accustomed to. However, for aviation interests, particular attention should be paid to Harry Reid and surrounding airports, where varying winds and potential overnight virga could briefly affect the otherwise steady flow of aircraft. The National Weather Service gives a heads up for possible "erratic and gusty winds during the evening," though they admit the confidence levels remain low. Considering the region's penchant for calm evenings, this may come as an unusual twist to daily operations.
For the community and travelers alike, the message from the NWS is clear: prepare to swiftly adjust your plans and wardrobes to match the changing whims of a desert climate that refuses to be pinned down by seasonal expectations. Spotters in the area are encouraged by the NWS to report any significant weather or impacts as these events unfold.
