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Storms bring heavy rain, lightning to Front Range

Monday night's storms brought heavy rain, lightning and hail to the Denver area and northern Colorado.

DENVER — Storms brought heavy rain and lightning to the Colorado Front Range Monday afternoon and evening, causing street flooding in Douglas County and a ground stop at Denver International Airport. 

The storms brought nearly nonstop lightning to Greeley and Fort Collins around 9 p.m. 

The Douglas County Sheriff's Office said around 7:15 p.m. that a portion of Monarch Boulevard in Castle Pines was closed due to road flooding. They said no one was trapped, but four cars were underwater. One to three inches of rain had already fallen in the area by 7:30 p.m. The road reopened around 9 p.m., the sheriff's office said. 

The Colorado Department of Transportation reported flooding on northbound Interstate 25 between Wilcox Street and Founders Parkway in Castle Rock. Traffic was still moving on the interstate. 

In the Deckers area, a portion of County Road 126 was washed out near Highway 67, the sheriff's office said. 

Golden also saw heavy hail and flooding. 

Denver International Airport was under a ground stop starting at 8:20 p.m. due to thunderstorms, the Federal Aviation Administration said. That ground stop was eventually lifted, but arrival delays persisted.

A house fire in Arvada may have been caused by a lightning strike, the fire department said. That fire was first reported at 7 p.m. at a home on Janice Way. Everyone inside was able to get out safely, firefighters said.

The National Weather Service issued a Flood Watch through midnight for parts of Adams, Arapahoe, Weld, Elbert, Douglas, Larimer, Boulder, Morgan, Jackson and Grand counties. 

Flash Flood Warnings were also issued Monday evening for areas including central Douglas County and the Cameron Peak burn scar in Larimer County. 

This moisture will stick around through much of this week, leading to cooler temperatures, more rain and possibly more flooding.

Temperatures cool off into the upper 70s and lower 80s by the end of the week, with more rain on the way.

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