- Cold fronts cause thunderstorms as they pass by
- A large cold front is moving past the school
- Therefore, the large cold front passing the school will cause thunderstorms

- The large cold front passing the school will cause thunderstorms
- The weather at school is hot and humid
- Therefore, the weather will change from hot and humid to having thunderstorms at the school

So, the weather will change from hot and humid to having thunderstorms at the school
Q: A large cold front is moving past the school on a hot, humid summer day. Which best describes the type of weather as the cold front passes by?
Context:
- Cold fronts cause thunderstorms as they pass by 
- A large cold front is moving past the school 
- The weather at school is hot and humid