It started snowing late yesterday evening.The snow lasted the whole night with strong wind.When i woke up early this morning i found everything outside was covered with snow.Snow is frozen water that falls from the sky.All snow flakes have six sides,but no two snow flakes are the same.Snow is good for winter wheat.It can protect the wheat from the coldness.People can go skiing after heavy snow.But too much snow can affect the traffic.Whe the snow melts and the streets are covered with ice it is dangerous for us to drive or walk on the streets.We should be careful to drive after the snow.