An advisory for a large weather system that is predicted to bring substantial snowfall to the southern Great Basin and Southern Sierra regions early this week has been issued by the National Weather Service in Las Vegas.Ahead of the upcoming Pacific storm, which is expected to start snowing tomorrow and continue through Tuesday night, NWS Las Vegas forecasts a break in the systems for today. Thanksgiving Day is expected to be cooler and dryer as the storm intensifies, and by the following weekend, another low pressure system is expected to target the Southern California Coast.
However, a band of west-southwest gusts between 15 and 25 mph may persist across parts of San Bernardino, southern Clark, and northern Mohave counties into the late morning. As this weather event progresses, there will be light rain showers or snow flurries, mostly limited to eastern Lincoln County and southwest Utah, which are not expected to have a significant impact within the NWS’s area of responsibility. Residents of Las Vegas woke up to a more muted atmosphere this morning with diminishing elevated winds that will continue to decrease throughout the Mojave Desert throughout the day.
A Winter Storm Warning, which includes a separate advisory for the White and Inyo Mountains for the same period, is in force for the Eastern Sierra Slopes over 7,000 feet from early tomorrow through Wednesday morning in anticipation of the approaching storm. People planning Thanksgiving travel are advised to heed these warnings and keep up with weather developments through credible sources, as the Winter Storm has the potential to cause significant disruptions, such as dangerous driving conditions and widespread infrastructure closures.
Although it is still difficult to predict the weather with any degree of certainty, current forecasts indicate that a trough pattern will continue through Wednesday. After that, a change in weather patterns is expected, with high pressure approaching over the weekend. Depending on how quickly this transition occurs, there may be more snowfall at lower elevations or a tapering off by Wednesday. Regional precipitation, temperatures, and snow levels may be affected differently as the pattern changes, with the Mojave Desert and Colorado River Valley perhaps remaining dry while areas of northern Colorado may see a resurgence of precipitation.
Consequences for aviation include persistently strong winds near Harry Reid International Airport, which range from 15 to 25 knots in the morning to westerly gusts in the afternoon. In northern Las Vegas, there is a 10% possibility of light northeast winds, although the current scenario is for westerly components until sunset, with light and variable evening winds following. Pilots should expect broken mid-to-high level clouds to persist, with few to scattered clouds at or above 7,000 feet.
Local spotters are encouraged to submit noteworthy observations in accordance with established protocols and play a crucial role in documenting meteorological phenomena in real time.
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