How many times do I need to read other's reviews on disaster films before I remember most people on here writing these think they are actual film critics? It is a disaster movie. Yes, the science is terrible. Yes the coincidences are fantastical. If you watch these for ground breaking stories with rich plots, or for an Oscar worthy performance by one of the actors, then you are watching these for the wrong damn reasons.
This movie shows a future where due to the rise in global temperatures, a modern ice age is triggered. How it is ushered in is by these violent, giant hurricane-like storms that cause flash freezing, and bring in a myriad of disasters with them. These include tsunamis and blizzards that drop so many feet of snow that people are walking level with the signs on the interstate that you would normally drive under. It also tries to throw in a lot of relatable human elements, such as the struggle of a man that is an absentee parent because of his job, trying to connect with his son, a lonely boy dying of cancer, and just the human death that this kind of disaster would bring.
Do not watch this for the science, though I do feel that they had the causation of another ice age correct. Do not watch this for deep plot. Watch this for the enjoyable ride on which it takes you.