Will you need a jacket today? You would if it's going to be like the coldest day on record: -134°F! We depend on the weather forecast to help us make choices every day. But how do meteorologists make their predictions? Join storm chasers and explore the tools they use to measure and track invisible patterns in the sky in this exciting book. Teach third-grade students about measuring temperature, wind speed, air pressure, rain, and more with the colorful images and fun facts in this high-interest informational text. Featuring a hands-on "Think Like a Scientist" lab activity that is aligned to the Next Generation Science Standards and instructions for making tools such as a thermometer, barometer, and anemometer, this book helps students apply what they've learned in the text and supports STEM instruction. Helpful diagrams and text features, such as a glossary and index, are also included to improve content-area literacy.