Clouds form over Interstate 15 near downtown Las Vegas as the sun sets on Thursday, July 17, 2025.

For the second time this month, monsoon storms created some chaos in Southern Nevada, albeit briefly.

The northbound lanes of Interstate 15 were briefly closed at Primm about 5 p.m. because of flooding from a thunderstorm.

Puddles of water at Paiute Way and Interstate 95 on Thursday.

Also, during a storm, a crash briefly caused the closure of the southbound lanes at Jean, about 12 miles north of Primm, the Regional Transportation Commission of Southern Nevada said on X.

Clouds gather over Charleston Boulevard in Summerlin, looking west, on Thursday.

By 6 p.m., all lanes of I-15 were re-opened. Primm is about 40 miles southwest of Las Vegas.

The National Weather Service said more than 1 inch of rain had fallen in the Primm area in a 20-minute span before 5 p.m.

Most of the Las Vegas Valley saw little to no rain despite a severe thunderstorm warning and flash flood watch.

On July 2, portions of the eastern valley saw a strong dust storm bring 70 mph winds that snapped trees and power poles, blocking roads and causing widespread power outages.

More storms Friday

There’s a 50 percent chance of storms, primarily in the afternoon, the NWS said. High temperatures should stay in the mid-90s, below normal for mid-July.

In a post on X, the NWS said “a low-pressure system developing off the coast of Baja California will spread moisture into the region.”

Airport showers

The last time Harry Reid International Airport saw measurable rain was May 6, according to Chris Outler of the NWS. But the airport did record a trace amount of rain in early May and early June.