听力原文：After very early heavy snowfall and a great start to the skiing and snowboarding

season, winter sports lovers will be excited to know that another heavy dump of snow is expected for the long holiday weekend. The weather bureau estimates between 5—7 inches of snow will fall in the city and surrounding mountains. This may come as a godsend for skiers and boarders, but city authorities are bracing for the worst. The Mayor has warned motorists to keep off roads and stay inside. People are advised to stock up on essential food and emergency items. The storm is expected to hit in less than eight hours.

What is the purpose of this passage？

A．To talk about winter sports

B．To warn of an impending storm

C．To ask drivers to drive more

D．To remind people to eat well