DENVER - Monsoonal moisture has moved into the High Plains after strong thunderstorms dropped more than 2 inches of rain in less than 30 minutes in the Denver metro on Sunday.
The heavy rain in such a short period of time led to flooded roadways that stranded several drivers and flooded a newly opened tunnel on Interstate 70 with more than a foot of water.
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Traffic was backed up for miles, and it took crews more than an hour to remove debris that had collected on the roadway.
There were several storm reports on Sunday, including one report of a boulder the size of an engine that fell onto Highway 285 in Poncha Pass, Colorado.
One person also reported seeing a funnel cloud that dissipated before touching the ground.
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A lot of the rain and thunderstorm activity has since slowed down over the past several hours, but activity is expected to ramp back up later on Monday as moisture continues to flow in from the south.
"Throughout the day, we will be focusing on northern New Mexico into southeastern Colorado once again for that concentration of showers and thunderstorms," FOX Weather meteorologist Jane Minar said.
The heaviest rain and thunderstorm activity is expected to remain over Arizona and into southern Nevada and Utah, though parts of northern New Mexico and Colorado could pick up 1 to 2 inches of rain over the next several days.
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