You probably know what you should do in case of a weather emergency - make sure you have a working flashlight with good batteries, candles, matches, battery powered radio and if you live in Maryland, bread, milk and toilet paper. There's lots of_ other_ sites to fill you in on emergency preparedness. If that's what you're searching for, stop reading now and go back to your search engine and try again. This is strictly tongue-in-cheek advice for crocheters (and anybody else who crafts)
But lucky for you, I'm here to tell you about those emergencies when you can't get to the yarn store or maybe the kids are home for 3 "snow days" in a row and you question your sanity. If you can, make sure you have a difficult project on the back burner - maybe an intricate sweater with lots of changes or a afghan with a zillion little stitches. This project may save your sanity during the long days of no outside input besides Wally the Weatherman saying "yup, it's going to be 5 inches of partly cloudy here tonight, folks". If you have some of the yarn you need to start this, all the better. You can begin the project and put it away until you "have more time". When you're snowed in, you will definitely have more time. You will be able to concentrate on the pattern with less interruptions.
Or maybe you got that bag of granny squares, you know which one. The granny squares your were doing to use up those little bits of yarn. Now you got 200 granny squares and not a clue how to use them. If you got the yarn, edge them in the same color. Start sewing some together. You can make a scarf easily with enough granny squares to make a longish rectangle. You can make it as long and as wide as you want. You can make lapghans by sewing/crocheting them together to form about a 36 inch by 36 inch square. If you have a granny square book (I'm recommending "Woman's Day Prize Winning Granny Squares" - not because I get a kickback, but because it's a good book), you can go granny square wild and make almost anything with your granny squares. This is a soothing way to accomplish something without going nuts.
Or maybe you got that pile of magazines and pattern books - you know, that one particular book you've looked at but never got around to working any pattern from. Just get some yarn, the proper hook for the yarn and practice that pattern. It might not be the right gauge or the color you want, but this is just a practice piece, you can rip it out and start again. (Don't use any furry type yarns for this, they are difficult to rip out.) You may work the pattern and think "wow, this is great" and dig in your stash to find what you need to make it the way you want to. Or you may say "there is _no_ way I can work this pattern for 403 rows. It's just not happening for me." Either way, you've taken a chance and tried something different to keep you as normal as possible during a prolonged time, anything to stave off that "cabin fever".
And "cabin fever" can make you do stupid stuff. Like say "I got 4 wheel drive, I don't care if there is 3 feet of snow on the ground, I got to get out!" And than your friends are seeing you on the tv, screaming at the yarn shop because it's closed and laughing until they realize it's _you_.
"Wow", they will say, "I can't believe Robin had it so bad that she thought the yarn shop would be open in 3 feet of snow."
I hope these tips have been helpful to you;) It makes the stash acquisition easier to deal with if you realize you are saving it up for a snowy day.