How a typhoon develop

1. How
Typhoon
Develops
PREPARED BY: TYPE YOUR NAME HERE

2. LEARNING OBJECTIVE
•Explain how typhoon
develops and how it is
affected by landmasses and
bodies of water

3. 1. Can you name any of the ocean currents?
2. Are there any patterns on the wind direction animation?
3. Using evidence from the Sea Surface Temperature and
Wind Speed map can you say why we get ocean currents?
Ocean currents and sea
surface temperature from
https://earth.nullschool.net
on 23rd May 2020
Surface wind speed map for
the 23rd May 2020 from
http://earth.nullschool.net

4. Tropical Cyclone
(also known as
a typhoon or
hurricane)
Describe the
satellite image –
what do you see?
Hurricane Maria, 2017. About 900 miles across.

5. What are the Impacts of
Tropical Cyclones? 1. Describe the
weather during
Hurricane Dorian
– a tropical
cyclone.
2. Describe the effects
of this tropical
cyclone on people
and the
environment

6. 500 to 2000km
Abou
t12K
M
Anvil of
clouds
bands Warm upwelling
air
Cooler sinking
air
Spiral of fastest
winds around the
Spiral bands of
Cross section through a tropical
cyclone
Line of cross
section
Low shear
Warm Ocean Water
Complete the diagram below by adding each word from the box into the gaps

7. 500 to
2000km
EY
E
Abou
t12K
M
Anvil of
CUMULONIMBUS
clouds
RAIN
bands
Warm upwelling
air
Cooler
sinking
air
Spiral of fastest
winds around the
EYE WALL
Spiral bands of
THUNDERSTORM
S
Cross section through a tropical
cyclone
Line of cross
section
Low WIND shear
Warm Ocean Water 26°C+

8. NORTH
AMERICA
EUROPE
AFRICA
13
2
6
9
2
9
7 9
TROPIC OF
CANCER (23.5°N)
TROPIC OF
CAPRICORN
(23.5°S)
EQUATOR
Map of major Tropical
Cyclones
KEY
Sea temperatures go above 26°C
Direction of cyclone movement
9
9
Typhoon
Haiyan
HURRICAN
ES
CYCLONES
TYPHOON
S
Average number of
cyclones a year
HURRICANES Local basin
name for tropical
cyclones

9. This map shows the tracks of all tropical cyclones which
formed worldwide from 1985 to 2005.
70°N
60°N
50°N
40°N
30°N
20°N
10°N
0°
10°S
20°S
30°S
40°S
50°S
5°N
5°S
1. Which areas get the most tropical cyclones?
2. Look carefully between 5°N and 5°S – what do you
notice?

10. Describe the
location of Tropical
cyclones
USEFUL SENTENCE STARTERS
-
Tropical cyclones are found...
Most Tropical cyclones occur
in.....
The least Tropical cyclones
occur.....
Many Tropical cyclones occur at
the latitudes of.....
There are no Tropical cyclones.....
Tropical cyclones are called …
The countries most affected by
Tropical cyclones are…
This second map shows that we
do not get Tropical cyclones
between the latitudes of…

11. 500 to
2000km
Line of cross
section
1. The sun
sends
incoming
solar
radiation to
Earth which
warms our
oceans
2. This warms the oceans to
a critical 26°C
3. This causes warm MOIST
air to rise through the air
4. This air cools as
it rises, causing
condensation to
occur and clouds
to form
5. Some cooled
air sinks back
down helping
to create the
EYE
6. Air rushes
in from
outside the
cyclone
creating
winds
7. The whole
cyclone rotates
because of the
Earth’s spin

12. • Storm surge: A rise in sea level due to the low
pressure and winds pushing water onshore. In
1899’s Cyclone Mahina the storm surge was
14.5m. Hurricane Katrina caused a 7.7 to 8.5m
storm surge in 2005
• Extreme rainfall: Tropical Cyclone Hyacinthe
was associated with over 6m of rainfall.
Hurricane Harvey dumped 1.53m of rainfall on
Texas in 2017.
• High winds: The 1924 Cuba hurricane had
wind speeds of 165 miles per hour. Hurricane
Laura in 2020 hit 150 miles per hour
Key Impacts of Tropical Cyclones

13. We can prepare for Tropical
Cyclones!
Is there enough detail on the poster
below?
Could anything else be included?

14. Review – True or false?
1-10 in the back of your books
5 seconds thinking time per question
1. If a storm isn’t spinning, it can’t be a tropical cyclone
2. A tropical cyclone will always have a name
3. A tropical cyclone can form over land
4. The name for hot air rising is ‘convection’.
5. A tropical cyclone will have winds of at least 74mph.
6. A tropical cyclone can only form over water that is
20o
C or warmer
7. A tropical cyclone would spin clockwise in the North
Atlantic
8. A tropical cyclone could form in the Arctic Ocean
9. A tropical cyclone near Japan would be called a
hurricane.
10. Tropical cyclones can happen in any month of the
year
1. True
2. True
3. False
4. True
5. True
6. False
7. False
8. False
9. False
10. True

15. Tropical Storms and climate
change
1850 2018
1900 2000
In a warming world
what will the
consequences be for
people living in areas
that suffer tropical
cyclones?

16. Content, images, text, etc. used belong to
the rightful owner. No copyright
infringement intended.