1. Chapter 11, air mass
Lesson 7 – front
Air Masses cold front
and Fronts warm front
Chapter 11, thunderstorm
tornado
Lesson 8 –
hurricane
Severe storm surge
Storms

4. cold front – cold air moves in under a warm air mass.
Cold fronts often bring brief, heavy storms. There may
be thunderstorms and strong winds. After the storm,
the weather is usually cooler and drier.

5. cold front – cold air moves in under a warm air mass.
Cold fronts often bring brief, heavy storms. There may
be thunderstorms and strong winds. After the storm,
the weather is usually cooler and drier.

6. warm front – warm air moves in over a cold air mass.
Warm fronts often bring light, steady rain of snow. The
precipitation may last for days. Winds are usually light.
Warm front may also bring fog – stratus clouds that form
near the ground. Afterward the weather is usually
warmer and more humid.

7. warm front – warm air moves in over a cold air mass.
Warm fronts often bring light, steady rain of snow. The
precipitation may last for days. Winds are usually light.
Warm front may also bring fog – stratus clouds that form
near the ground. Afterward the weather is usually
warmer and more humid.

8. warm front – warm air moves in over a cold air mass.
Warm fronts often bring light, steady rain of snow. The
precipitation may last for days. Winds are usually light.
Warm front may also bring fog – stratus clouds that form
near the ground. Afterward the weather is usually
warmer and more humid.

9. warm fronts vs. cold fronts

10. thunderstorm – the most common type of storm

11. thunderstorm – the most common type of storm

12. tornado – a violent whirling wind that moves
across the ground in a narrow path

13. tornado – a violent whirling wind that moves
across the ground in a narrow path

14. hurricane – a very large swirling storm with very
low pressure at the center

15. hurricane – a very large swirling storm with very
low pressure at the center

16. hurricane – a very large swirling storm with very
low pressure at the center

17. storm surge – a great rise of the sea along a shore

18. storm surge – a great rise of the sea along a shore

19. storm surge – a great rise of the sea along a shore