Thunderstorms
This type of cloud produces thunderstorms.
cumulonimbus cloud
A rotating column of air that reaches the ground.
tornado
The calm centre of a hurricane
the eye
A severe snowstorm is called thi
a blizzard
A flood that occurs very quickly
flash flood
Warm air rising in a storm is called this.
updraft
A tornado begins as one of these
funnel cloud
The strongest winds occur here
the eyewall
Visibility during a blizzard must be less than this distance
200 metres
A flood that may last weeks or months
broadside flood
This stage has heavy rain, thunder, and lightning
mature stage
Tornadoes usually form from this type of storm.
severe thunderstorm
Hurricanes form over this
warm ocean water
Blizzard winds must exceed this speed
55 km/h
A structure used to divert floodwater
floodway
This sound is caused by lightning.
thunder
Tornadoes can reach wind speeds up to this many km/h.
500 km/h
Hurricane winds must reach at least this speed
119 km/h
Name two dangers of blizzards
frostbite, hypothermia, poor visibility, accidents
Name two causes of flooding
Heavy rain, snowmelt, hurricanes, storm surge, ice jams (any two)
Name all three stages of a thunderstorm.
developing, mature, and dissipating stages
Explain how a tornado forms.
Warm air rises, wind shear causes rotation, a funnel cloud forms, and reaches the ground
Explain why hurricanes weaken over land
They lose their source of warm ocean energy
Name three safety precautions during a blizzard
Stay indoors, avoid travel, dress warmly, keep emergency supplies
Compare flash floods and broadside floods
Flash floods occur quickly with little warning; broadside floods develop slowly and affect larger areas