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BOISE Severe thunderstorms are moving across the Treasure Valley this afternoon bringing heavy rainfall, lightning, strong winds and golf ball-sized hail in some areas.

KTVB Meteorologist Jim Duthie says deep moisture over the area, along with an approaching cold front, triggered the thunderstorms throughout southwest Idaho and southeast Oregon. Those storms are also bringing the threat of flooding. Some areas could receive up to a half an inch of rain.

Duthie says the storms will last until after dark and then diminish. Drier, cooler air will then spread across the region.

Go to our weather page to get the latest weather advisories.

We received reports of heavy rainfall on Interstate 84 between Boise and Nampa.

The Idaho Transportation Department sent out several traffic alerts saying the interstate was stop and go. One motorist told us she decided to pull off onto the shoulder off the interstate and wait for the storm to pass.

There have also been some reports of minor flooding on city streets.

KTVB's Andrea Lutz was driving along Highway 55 in Horseshoe Bend and said she encountered golf ball-sized hall falling on the road. Motorists are advised to use caution and avoid traveling during the storm, if possible.

In Owyhee County, a vehicle with several people inside went off Highway 78 into a canal. Everyone managed to get out safely, but dispatchers are cautioning residents to stay inside and avoid any unnecessary travel due to the slick conditions on the roads.

Idaho Power reports that nearly 1,600 customers in Nampa are without electricity. That was just before 4 p.m., around the same time when the storm blew through town.

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