- When warm air mass passes over cold air mass, the water vapor in the warm air mass will condense
- A warm front is when warm air mass passes over a cold air mass
- So, a warm front will cause the water vapor to condense

- A warm front will cause the water vapor to condense
- Clouds are formed by water vapor condensing
- Therefore, a warm front causes clouds to form

- A warm front causes clouds to form
- Cloudy means the presence of clouds in the sky
- Hence, a warm front causes the the sky to be cloudy

- A warm front causes clouds to form
- Clouds produce rain
- Hence, a warm front causes it to rain

- A warm front causes it to rain
- If it is raining, then the weather will be rainy
- Therefore, a warm front causes the weather to be rainy

- A warm front causes the the sky to be cloudy
- A warm front causes the weather to be rainy
- Hence, a warm front causes cloudy and rainy weather

So, a warm front causes cloudy and rainy weather
Question: Which condition is associated with most warm fronts?
Context: - When warm air mass passes over cold air mass, the water vapor in the warm air mass will condense 
- Clouds produce rain 
- If it is raining, then the weather will be rainy 
- A warm front is when warm air mass passes over a cold air mass 
- Cloudy means the presence of clouds in the sky 
- Clouds are formed by water vapor condensing