The storm hit Wilder in western Canyon County about 2 p.m. Thursday, with wind gusts up to 30 mph, the National Weather Service reports.
By 3, the storm was moving through the Boise area, and the weather service predicts possible hail and wind gusts to 35 mph until about 4 p.m., when it will head into Elmore County, meteorologist Valerie Mills reports.
"They're just racing through like a commuter," Mills said.
Small hail and heavy rainfall was reported in Star at 2:40 p.m., and 30 mph winds caused a power outage in Meridian, she said.
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No further thunder storms are expected later Thursday, Mills said, but showers will continue through the early evening. Dry weather and a warming trend are expected through the weekend.
The overnight low Thursday night is expected to be 45 degrees. Thursday's high temperature of 63 degrees came at mid-afternoon, before the thunderstorm hit, she said.