Thunderstorms are caused by cumulonimbus clouds and require moisture, unstable air, and lift to form. They most commonly occur in the spring and summer afternoons and evenings. Around 1800 thunderstorms occur globally each day. Thunderstorms can be dangerous due to lightning, heavy rain, hail, strong winds, and sometimes tornadoes. It is important to seek shelter indoors when thunderstorms threaten.

1. Thunderstorms
By: Luke, Luis, Hunter

2. What is a thunderstorm?
• A thunderstorm is a storm with lightning and
thunder. Its produced by a cumulonimbus
cloud, usually producing gusty winds, heavy
rain and sometimes hail.

3. What causes a thunderstorm?
• The basic ingredients used to make a
thunderstorm are moisture, unstable air and
lift. You need moisture to form clouds and
rain. You need unstable air that is relatively
warm and can rise rapidly. Finally, you need
lift. This can form from fronts, sea breezes or
mountains.

4. When are thunderstorms most likely
to occur?
• Thunderstorms can occur year round and at all
hours. But they are most likely to happen in
the spring and summer months and during
the afternoon and evening hours.

5. How many thunderstorms are there in
a day?
• It is estimated that there are around 1800
thunderstorms that occur across our planet
every day.

6. What damages thunderstorms can
cause?
Usually there is lightning during a thunderstorm
and lightning is the cause of many people
death, if they are unlucky enough to be struck.
Lightning can also cause fire, hail, wind,
lightning and tornadoes are some of the
weather condition that occur during a
thunderstorm.

7. • http://www.youtube.com/watch?v=tmjrRrvF7
J0&feature=related

8. How to prepare for a thunderstorm?
• Keep an eye at the sky. If you hear thunder go
to a same place immediately. Make sure that
you are not outside while a thunderstorm is
occurring. Also make sure you are not close to
a window. The best place to be is in a car or in
a building make sure the window are closed.

9. • Google Images
• Weatherwizkids
• Youtube