How did we determine the weather pre-digital age?

THERE’S a storm coming. I can feel it in my throbbing temples and in the oppressive, muggy heat that’s been building all day. I also know from this morning’s radio forecast that thundery showers are expected by nightfall but having just read a book that claims humans don’t need professional meteorologists to predict the weather, I have switched off all my gadgets and determined to study the world around me for clues as to when the storm will break. . http://www.heraldscotland.com/news/16295823.How_did_we_determine_the_weather_pre-digital_age_/