They finally reopened interstate 5 so we made it to Mt. Shasta this morning by around 10:30

From our hotel in Redding the 4 of us could see trucks on Interstate 5 back up in the north bound lanes as far as the eye could see (many miles). Since we wanted to avoid spending about 2 to 3 hours or more in this backup on the freeway we used a frontage road my friend and his girlfriend know about. So, as soon as we got on the freeway we were traveling freeway speeds most of the way to Mt. Shasta. Since the temperature had risen to 36 degrees it was raining instead of snowing so we saw a lot of snow on the sides of the roads but the snow in the road had been plowed or melted one of the two by the time we drove north. The most snow we had to drive through was just trying to get off the Freeway into Mt. Shasta and parts of the hotel area had not been plowed yet and even where we were staying the area there we had to wait for heavy snow movers Skip loaders to finish clearing so we could actually park and unload. And even then I had to put on snow boots to unload because I had to park on 8 or 10 inches of snow. So I needed to get out of my waterproof Croc sandals and into snow boots to unload all our stuff . So, much of Mt. Shasta and the surrounding areas are snowed in still. It's only Interstate 5 that is completely open now (just during the day for sure) because tonight or tomorrow night it might close down again. So, you want to be driving north or south between Ashland and Dunsmuir or Castella you might want to do this before 2 or 3pm today or you might not be able to.

There were snow flurries from our view veranda of the mountain that we observed as we moved into our view room at the hotel. And all the roofs we could see had at least 2 to 3 feet of snow on them.

However, snow on a roof up to a certain point keeps you warmer as a form of insulation. But, beyond 4to 5 feet or more and up to 10 feet or more it might collapse your roof. But, most roofs are okay with 2 to 3 feet of snow up there if they are built correctly in the first place.

For example, Horse Camp Lodge owned by the Sierra Club as an emergency winter shelter for climbers of Mt. Shasta can take about 25 feet of snow or more on the roof because it is designed for this.
But, most regular homes aren't designed this way for heavy snow loads.

I myself in 1973 had to take a shovel because the snow was as high as the Chimney top and dig down to even get the door open there to stay a few days in the spring then in late April 1973. But, generallly speaking 25 to 40 feet of snow on Mt. Shasta at those altitudes was not unusual then.