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What kind of clouds lit up the sky above Denver this week?

Lots of viewers were stunned by the clouds in the sky during the sunset Monday night. They're called cumulonimbus or mammatus clouds.

Coloradans across the Denver metro area were treated to some incredible views of clouds during Monday and night's sunset. 

Even more viewers saw a similar-looking cloud Tuesday night in the metro area.

9NEWS viewers in Denver, Aurora, Parker, Lakewood, Morrison, Boulder, Littleton, Sterling, Centennial, Highlands Ranch, and Brighton sent in photos of the colorful sky and unqiue-shaped clouds. 

Do you have an awesome photo to share? Email us at yourtake@9NEWS.com 

Meteorologist Cory Reppenhagen said a decaying thunderstorm made way for some lovely-looking mammatus clouds over the Denver metro area Monday and Tuesday. A particularly orange sunset helped tie the spectacle together.

"The whispy clouds are from the snow and the graupel evaporating quickly as it falls from high altitude," Reppenhagen said. "The pillowy clouds underneath the anvil, are called mammatus."

"You could probably see it from 80 to 90 miles in any direction," he said. 

Here’s a roundup of photos from viewers: 

Credit: Scott Ashley
Sunset in Arvada.
Credit: Jeff Edwards
Sunset from Sterling
Credit: Raymundo Wong
Downtown Denver on Monday.
Credit: Amanda
Our Pup Maggie loved taking in the view from her new house in Arvada tonight!
Credit: Montoya Whiteman
Brighton sunset
Credit: Rob Nixon
Westminster
Credit: Jeff Taylor
Clouds over Jefferson County
Credit: Phil Rooke
Clouds in Aurora
Credit: Chris Kirk
The sunset from Banded Oak Brewing Co.
Credit: Scott Breay
Arvada, Stenger Soccer complex
Credit: Lisa Fallon
Highlands Ranch
Credit: Jennifer Carreiro
Old South Pearl Street in Platt Park.
Credit: Carla Howard
Clouds in Denver
Credit: Terri Glassman
Littleton
Credit: Jacqueline Brown
Highlands Ranch
Credit: Tom Kocialski

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