1. THUNDERSTORMS

2. What is a thunderstorm? A storm that contains lightning and thunder.
Produced by cumulonimbus clouds.
Creates gusty winds
Heavy rain
Even hail sometimes!

3. Weather during a thunderstorm
Hail
The largest piece of hail to ever fall was in July. It measured 8” in diameter and weighed 1.94lbs.
Heavy rain
The average amount of water that falls during a thunderstorm is about 2,000 metric tons.
Gusty winds
Highest wind speed ever recorded was 150mph in
Thunder&Lightning
Thunder and lightening go hand in hand when it comes to thunderstorms.

4. Conditions to create a thunderstorm
Forms when moist, unstable air is lifted vertically into the atmosphere.
Moisture is needed to form clouds.
Unstable air that is relatively warm and can rise fast is needed.
Lift can form from fronts sea breezes or mountains
Lifting of the air results in condensation and the the release of leftover heat.

5. Where and when thunderstorms occur
Thunderstorms occur everywhere there is not one place a thunderstorm occurs. However they are most likely to occur in the tropical areas.
WHEN
Thunderstorms happen all year round, they are most likely to happen in the spring and summer.

6. Predicting thunderstorms
Air pressure
You can predict a thunderstorm using a barometer.
When the pressure is low you are going to have cloudy days, when the pressure is really low you are going to have a thunderstorm.

7. ARGENTINA The worst thunderstorms happen in Argentina.
Hundreds of people were evacuated from homes.
At least 12 deaths happened because of the thunderstorm on December

8. Test your knowledge 1. What type of cloud is in a thunderstorm?
A)Nimbostratus
B)Cirrus
C) Cumulonimbus
D) Stratus
E) Altostratus

9. The answer is...

10. 2. What is the weather like during a thunderstorm?
A) Windy
B) Rainy
C) Hailing
D) All of the above

11. The answer is..

12. 3. Which one of these is a barometer?D)

13. The answer is....

14. 4. When the air pressure is really low it means...
A) Clear skies
B) Thunderstorm
C) Cloudy
D) Sunny

15. The answer is...

16. Bibliography http://www.eoearth.org/view/article/156624/
thunderstorms.htm
barometer.html
storms_ryanlerch_01.svg.hi.png

17. By: Hailey MacIntyre
Thanks for watching and watch out for a thunderstorm there may be one coming your way.