Sometimes the National Weather Service will issue a hazardous weather outlook, an advisory, treat this as a green light.

有时候国家气象局会发布一个危险的天气预报，一个警告，把它当作绿灯。

All 100 counties in North Carolina had at least one type of National Weather Service alert, from a flash-flood warning to a hazardous weather outlook, in effect for Sunday or the days ahead.

北卡的100个县均发布了至少一种国家级气象警报，从闪电洪水警报到危险天气预报，警报于周日或之后几日生效。