What could have been a deadly situation, thankfully turned out to just be a highly inconvenient one. A rockslide in Glenwood Canyon in Colorado closed I-70 on Tuesday. National Weather Service reports that “rapidly freezing and thawing temperatures combined with precipitation make for ideal conditions for rockslides in extreme terrain.” Tuesday’s rockslide was an important reminder of the dangerous impact that winter weather can have in western Colorado. It took most of the day for crews to clear the roadway enough for one lane to be open. Highway 40 felt the increase in diverted traffic.