This document provides a unit of lessons and activities on thunder storms and blizzards that are intended to provide students with a basic understanding of the causes and consequences of these natural disasters. The booklet is designed to be used in correlation with a science unit or as a supplement to an elementary science curriculum. The lessons are arranged sequentially, but activities can be extended or omitted according to student interests and abilities. Questions are included that require students to: (1) look for cause and effect; (2) make predictions based on information in the reading section; and (3) to draw conclusions supported by the evidence presented. Extension sections are included to challenge students to pursue topics according to their own interests, talents, and capabilities. A glossary and an answer key for the activities are included. (TW)