This illustration made available by the National Weather Service on Thursday, Feb. 4, 2021 shows a Feb. 10-14 forecast for below-normal temperatures for large parts of the United States. The mid-February killer freeze was no surprise and yet catastrophe happened. Meteorologists, government and private, saw it coming, some nearly three weeks in advance. They started sounding warnings two weeks in advance. They talked to officials. They tweeted and used other social media and were downright blunt.