Las Vegas is set to experience calm and warm weather conditions through the weekend as high pressure reigns. The skies will remain clear with the continuation of above-normal temperatures. However, a different scenario is expected early next week when a low-pressure system originating from the Gulf of Alaska is slated to introduce cooler weather, with potential for wind gusts on Monday and even possibilities for rain and mountain snow in regions north and east of Las Vegas, according to the National Weather Service.
Changes in the weather pattern will commence on Sunday, with winds picking up across the region due to an approaching Pacific Northwest shortwave trough. "High pressure will remain firmly in control through Saturday," stated the National Weather Service. This upcoming shift is linked to a prevailing system near the British Columbia coast, leading to increased winds and the drawing in of moisture from the remnants of Hurricane Kristy—though it is noted that the odds of this moisture affecting the local weather are low.
As the atmosphere's dynamics evolve, Monday's forecast calls for a pronounced change with the onset of a significant trough pushing into the Western US, which holds the potential to introduce cooler conditions. While moisture will precede this trough, "The lack of overlap between the primary moisture plume and dynamics means that most of the precipitation with this system will stem from orographic lift, and thus largely confined to the higher terrain," according to the National Weather Service. The National Blend of Models (NBM) indicates limited precipitation for valley floors, with the higher likelihood of snow in local mountain ranges.
The National Weather Service emphasizes confidence in a cooldown of 15 to 20 degrees and notes that gusty conditions are likely to be the most impactful aspect of this system, with places ranging from western San Bernardino County to eastern Mohave County expected to see strong wind gusts on Monday. These windy conditions could persist into Tuesday, particularly affecting areas in San Bernardino County. However, by Wednesday, a respite from the wind and precipitation is forecasted. Yet, the National Weather Service advises vigilance as the active weather pattern may usher in another trough by the end of the week.
Aviation interests should note that VFR conditions are anticipated to prevail across the Harry Reid International Airport with winds maintaining speeds of less than 8 knots, shifting direction from easterly in the afternoon to westerly in the evening. Pilots can also expect only a few to scattered high clouds, as conveyed by the National Weather Service. Within Southern Nevada, northwest Arizona, and southeast California, similar VFR conditions with minimal winds are expected at all regional TAF sites.
For the general public and weather enthusiasts, the National Weather Service welcomes reports of significant weather events or impacts via their standard operating procedures. This active communication from spotters remains an integral part of weather monitoring and forecasting.
