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.
The main difference between the Watchman and the Lariat is that the Watchman is a metal and fabric implant placed inside the heart, blocking the opening to the appendage. The Lariat on the other hand occludes the appendage by tying off the base of the LAA from outside the heart.