It's still snowing...ready for solar greenhouses and cold frames?

It looks like the photos of April 22...and it's still coming down. More forecast thru the weekend.
Are we ready to adapt our garden boxes with cold frames....or better yet, a solar or cold greenhouse?
I already grieve with all of you that have lost whatever you may have planted.   Wonder if the French Tarragon can take another bout of snow? Will let you know just how hardy it's proving to be.