Stormy start to the week in Las Vegas
Las Vegas is starting the first week of June under a dynamic weather pattern, as tropical moisture surges into the Mojave Desert, driven by a low-pressure system currently spinning just west of Baja California. According to the National Weather Service in Las Vegas, the desert skies are expected to erupt with showers and thunderstorms beginning today, continuing through Monday, with heavier rainfall targeting northwestern Arizona and the southern tip of Mohave County.
Thunderstorm threats and flooding risks
The tropical moisture is residual from Tropical Storm Alvin, and its arrival brings a heightened threat of thunderstorms, some of which may be strong enough to produce outflow winds. These can stir up dust and debris, reducing visibility in open areas. The NWS warns that “strong outflow winds are a possibility with any showers that form,” increasing the concern for localized flash flooding, especially where soils remain hardened by recent dry spells. Southern Mohave County is under a Marginal Excessive Rainfall Outlook, meaning isolated flash flooding could emerge as the atmosphere continues to saturate.
While initial virga showers—rain evaporating before it hits the ground—have been observed, tonight’s storms may bring sufficient moisture to reach the parched surface. Residents across the Las Vegas Valley and beyond should remain on alert through early Monday morning.
Temperatures cool temporarily before surging midweek
With thicker cloud cover and enhanced atmospheric moisture, temperatures in Las Vegas are expected to dip 5 to 10 degrees Fahrenheit (3 to 6 °C) below the recent highs. That temporary cooldown, however, will be short-lived. By midweek, as the moisture exits eastward and a ridge of high pressure rebuilds, the mercury is forecast to rise sharply, reaching levels up to 10°F (6 °C) above normal.
By this coming weekend, temperatures in the desert valleys will likely climb back into the triple digits—well above seasonal averages—pushing Death Valley into a Moderate HeatRisk category for Monday and potentially beyond. Heat-sensitive groups may experience increased stress as the desert heat returns in full force.
Windy conditions challenging for pilots
For those taking to the skies, aviation conditions may prove challenging, particularly today and tonight. The NWS notes that south-southwest winds will continue throughout Monday morning, with gusts reaching 15 to 25 knots. Thunderstorms, particularly those forming in the evening, could bring unpredictable gusts and shifting wind directions, adding to the complexity of local and regional flight operations.
Wet weather may persist into Thursday
Although a drier pattern tries to assert itself by midweek, the NWS expects that a northwest flow could keep scattered showers and gusty winds in play through Thursday. This is due to a mix of lingering tropical moisture and incoming shortwaves, which may continue to destabilize the region’s atmosphere. As the new ridge settles in, though, the heat will rebuild, driving temperatures in Las Vegas and nearby valleys back into the upper 90s to low 100s °F (37 to 40 °C) by Friday and Saturday.
Spotter activation and public awareness
Due to the unsettled conditions, NWS Las Vegas has encouraged trained weather spotters and the public to report any significant weather impacts, including flooding, wind damage, or dangerous lightning. As the early summer storm season unfolds, all eyes remain on the skies over Clark County and the surrounding Mojave Desert.
