01:03 Extreme Avalanche Danger for Colorado Drivers are being urged to avoid the mountains as the state faces another day of dangerous avalanche conditions.

At a Glance Highway 91 remained closed Friday near Copper Mountain, a day after an avalanche buried cars on the roadway.

Colorado's avalanche danger is at the highest level in some parts of the state.

So far this season, more than 2,000 avalanches have been recorded, including at least 288 this week. A backcountry skier was killed Thursday in an avalanche in the Jones Pass area of Clear Creek County, Colorado, amid warnings of extreme avalanche danger, authorities say.

Hans Berg, 48, of Empire, Colorado, became the seventh fatality from avalanches this season, according to the Colorado Avalanche Information Center (CAIS).

Berg was working as a photographer for a backcountry skiing and boarding tour. He dropped below a group to capture some images and was carried away by the slide . He was recovered from the snow and later succumbed to his injuries at a local hospital, the Summit Daily reported.

On Monday, the body of backcountry skier Scott Spencer, 53 was recovered in the Matterhorn area near Telluride, the Telluride Daily Planet reports.

The avalanches have been particularly numerous this week with at least 288 slides reported, the Denver Post reported.

A lengthy stretch of Highway 91 in Colorado remained closed Friday, a day after an avalanche buried several cars south of Copper Mountain in what's become a historically dangerous season for avalanches in the state.

Amid extreme avalanche danger, the slide was reported just before 4 p.m. MST and the highway was closed from Copper Mountain to Leadville as a result, CDOT tweeted. The agency noted that it did not know when the highway that was closed between Leadville and Copper would reopen.

The Summit Daily reported four cars were buried under as much of 15 feet of snow. Charles Pitman, a spokesman for the Summit Rescue Group, told the newspaper at least one car was completely flipped and buried. However, no injuries were reported.

The slide was reportedly 300 feet wide and up to 15 feet deep and occurred on Resolute Cliff, an area where no avalanche had hit before, according to CDOT.

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News crews attempting to reach the site of the slide said they were stopped by another avalanche that was triggered just a few miles north of Copper Mountain.

"I think it's pretty safe to say that nobody that is alive has seen a week like this ," Colorado Avalanche Information Center director Ethan Greene told the Post Independent, speaking about the extreme avalanche danger in the mountains.

Early Thursday, a 13-mile section of Interstate 70 between Vail and Copper Mountain was closed in both directions after an avalanche ruptured a natural gas pipeline. It was later reopened once crews cleared the roadway.

Loveland Pass also remained closed Friday, according to CDOT.

An earlier avalanche on Thursday temporarily closed I-70 at milepost 186. A tow truck was caught up in the avalanche but the driver was reportedly uninjured, the Denver Post reported.

The Colorado Avalanche Information Center (CAIC) upped the avalanche warning in parts of Colorado to the highest level of 'extreme' Thursday, noting that some avalanches could be "historic in size." The warning includes the Front Range, Steamboat and Flat Tops, Vail and Summit County, Sawatch, Aspen, Gunnison, Grand Mesa and the San Juan Mountains.

“Do not travel in the backcountry. Historic avalanches expected to valley floors,” the CAIC warned, urging drivers to avoid all avalanche-prone terrain.

So far this season, more than 2,000 avalanches have been recorded, the Denver Post reported. A typical season sees 3,000 avalanches, but most occur during the spring melt. Spencer Logan, an avalanche forecaster for the Colorado Avalanche Information Center, noted that this year is different from previous years.

“We are seeing avalanches run longer than they have in 50 years in some cases,” Logan told the Post. “We’ve gotten a lot of snow on the mountains and it is starting to come down.”

"These are 1-in-30 to 1-in-50-year kinds of avalanches,” Ethan Greene, director of the CAIC, told the Post.

Greene said authorities are "definitely concerned about the safety of people in the backcountry."

"Given the conditions, and the amount of time left in the winter, there probably will be other accidents,” he told the Post.

The CAIC noted that warm temperatures, rain on snow and strong winds are "rapidly overloading the snowpack across the North San Juan zone. Conditions are becoming very dangerous."

The threat prompted the closure of all upper mountain lifts and terrain at the Breckenridge Ski Resort. Arapahoe Basin closed Thursday as well.

All week, CDOT and CAIC have worked to mitigate potential avalanches in areas at risk.

The area received 5 inches of snow overnight Tuesday, adding to the nearly 60 inches of snowpack already reported at the Vail Pass. More snow is expected this weekend.