Thirtysomething debuted Sept 29, 1987, on ABC and within a year had won an Emmy for best drama series and was on its way to becoming more than a show. It turned into such cultural phenomenon, the title made its way into the dictionary and, subsequently, into TV history.
The difference between a tornado watch and a tornado warning means the difference between taking action or taking precautions. A watch means that conditions are favorable for a tornado to occur. A warning means that a tornado has been seen or picked up by radar. A warning requires you to take shelter and brace for a potential tornado.
Warn is defined as to tell or caution against danger. An example of warn is to tell someone that there is a slippery road ahead. to tell (a person) of a danger, coming evil, misfortune, etc.; put on guard; caution. to caution about certain acts; admonish: warned against smoking in the building.