meteorologists are not the only ones who look for unusual signs. tv weather reporter ross lindy recalls, '' my mother used to say that it was going to rai every time the cows lay down in the fields, and she was always right ! '' many older people have their own ''methods'' of predicting the weather, but nowadays things are more scientific. in fact,it is surprising how even a child can make day-to-day predictione with just a little bit of information. so how is the weather actually forecast?