Las Vegas is set to experience its 100th day of triple-digit heat, matching a record. The National Weather Service Las Vegas warns that dry and windy conditions starting Wednesday will increase the risk of fires. Dew points are dropping, and temperatures are expected to cool slightly by Thursday. However, strong winds are raising concerns, leading to upgraded Fire Weather Warnings in Clark and Mohave counties.
While the heat lingers, strong winds are predicted to accompany the drier air influx, and this has led to heightened alerts; a Red Flag Warning is currently in place for Lincoln County and expansions cover most of Clark and Mohave counties, according to the National Weather Service Las Vegas. The southern Great Basin should expect the cold front shortly after sunset, weakening as it moves south, pushing temperatures down approximately ten degrees from Tuesday's highs. The long-term forecast points towards a fall-like weather shift with below-average temperatures as back-to-back low-pressure troughs make their way across the region, heralding cooler days ahead.
Aviation forecasts for Harry Reid International Airport predict southwest winds to be strong, with gusts of 20-30 knots likely in the afternoon and evening. The models are uncertain about whether these conditions will continue through the night. Similar weather is expected across southern Nevada, northwest Arizona, and southeast California, with dry conditions and strengthening south-to-southwest winds. Gusts may persist into the night, particularly in areas like Daggett and the Las Vegas Valley.
Over the weekend, attention will turn towards the tropical moisture potentially pushing northward up the Gulf of California; this could introduce chances of thunderstorms by Sunday and Monday if dry air from an additional trough doesn't outpace the moisture inflow, "Timing will be key in this scenario as an additional trough will usher dry air into the southwestern United States early next week," the National Weather Service Las Vegas advised. Spotters are encouraged to report any significant weather or impacts according to standard operating procedures.
