I found myself nodding along with all of this. I'm constantly surprised, in this day and age of easy internet access and use, that more people don't go to the small trouble of checking the weather. If there will be severe weather, try to get around it. Leaving early is a great tip.
I will say that the airlines have gotten much, much better about mass cancellations in the past few years. They issue waivers further in advance and with more flexibility. They do a very good job now of reseating people from cancelled flights. Even hold times seem lessened.
The other advice, to have some small emergency pack is also a great one. I always travel with allergy medicines and make sure to have some in my backpack. That's my big 'miserable without' item and I don't want to be found short. This, of course, will vary for others.
A very good read.