Three severe winter weather/freeze events accounted for the lion’s share of Allstate Corporation’s estimated US$223 million (pre-tax) in catastrophe losses for February 2015, the insurer reports.The cat loss estimate for the month was US$223 million (pre-tax) and US$145 million (after-tax), notes a statement last week from Allstate, the largest publicly held personal lines in the United States, whose brand’s network of small businesses offers auto, home, life and retirement products and services in the U.S. and Canada.