Impact Forecasting, the catastrophe model development center of excellence at Aon Benfield, today releases the latest edition of its monthly Global Catastrophe Recap report, which reviews the natural disaster perils that occurred worldwide during January 2014. Aon The report reveals that a series of powerful winter storms brought excessive snow and bitter cold to the United States. No fewer than four separate stretches of winter weather affected United States in January, bringing heavy accumulating snowfall, sleet, freezing rain, ice, gusty winds, and bitterly cold Arctic air to much of the country. The most significant — and costliest — period occurred during the second week of the month, where at least 21 people were killed.