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Las Vegas Braces for Storms: NWS Warns of Flash Flood Potential in Southern San Bernardino County

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Published on August 25, 2025
Las Vegas Braces for Storms: NWS Warns of Flash Flood Potential in Southern San Bernardino CountySource: Unsplash/ Wes Warren

Las Vegas Weather Update: Prepare for a bout of stormy weather today. According to the National Weather Service in Las Vegas, widespread showers and thunderstorms are expected throughout the area, with the potential peak hitting on Tuesday.

The National Weather Service is warning residents, especially in far southern San Bernardino County, including Yucca Valley, Joshua Tree, Twentynine Palms, and along State Route 62, to brace for possible flash flooding due to an influx of moist air and thunderstorms. The primary concerns, as noted by the Weather Service, include "frequent lightning, heavy rain, gusty winds, blowing dust, and flash flooding." An additional hazard comes from the possibility of winds exceeding 50 mph and a 10% chance of thunderstorm-related wind speeds over 58 mph in the highlighted regions.

Travelers and locals should be prepared for shifting conditions in the skies above. For those flying into or out of Harry Reid, expect the typically quiet morning to give way to potential thunderstorm activity around noon. These storms could trigger "erratic gusty winds and briefly heavy rain with lower ceilings," impacting flights and air traffic. The same holds for much of southern Nevada, northwestern Arizona, and southeastern California, where isolated showers and thunderstorms could lead to similar disruptions.

Even with more storms around, city temperatures will stay near 100°F. After Tuesday, drier southwest winds will reduce rain and storms, and temperatures should return to normal for the season. Later in the week, the weather will calm down, but people should still be careful in areas affected by storms.