Tommy was always curious about how his Grandpa Joe could predict the winter weather so accurately. One cold day, Grandpa Joe decided to share his secret. He explained that observing nature could provide clues. Squirrels gathering extra nuts, birds flying south early, or a ring around the moon meant a harsh winter was coming. But Grandpa Joe also taught Tommy about jet streams and air masses. 'Meteorologists,' Grandpa Joe said, 'use these to forecast the weather scientifically.' He showed Tommy a weather map filled with colorful lines and symbols. 'These represent different weather conditions,' he explained, pointing at the map. From that day, Tommy started observing nature and checking weather maps too. He learned that predicting weather was not just guesswork but a science, and fun too. That winter was extraordinarily exciting for Tommy, who could now understand the whispers of wintertime.