Originally Posted by
IO540
Why didn't the forecaster just list every possible weather?
At least that way they would get it right! They just list the most probable, which is probably why they get it wrong so often. Even so, looking at that TAF, the TS might make you stay away whereas just the RA might make you head out. If the RA one was a PROB40 you wouldn't get the PROB30 TSRA. Some might say that was important to know.
Good reason to keep an ear on the weather if on a long trip, the idea is that they get more accurate the closer to the time you arrive.