Download Severe Weather and Weather Safety

Severe Weather and Weather
Safety
1.Thunderstorms
2.Hurricanes
3.Tornadoes
4.Safety
1. Thunderstorms
• An intense local storm that forms strong
winds, heavy rain, lightning, thunder and
sometimes hail
• Last for about 30 min.
Formation of a Cumulonimbus cloud
a.
b.
c.
d.
Warm air rises and forms a cumulus cloud
Cloud continues to build upward
Cumulonimbus cloud forms
Ice particles may form and as they grow large
they fall and pull cold air down with them – this
brings heavy rain and hail.
e. Downdraft spreads out blocking warm air from
rising and storm slows down and ends.
Lightning and Thunder
• Lightning – a discharge of
electrical energy
• Thunder – sound created by the
rapid expansion of air along the
lightning strike
2. Hurricanes
A tropical low-pressure system with winds
blowing at speeds of 119km/h (74mi/h) or
mores
Called Typhoons over the west Pacific
Called Cyclones over the Indian ocean
Formation of a Hurricane
• Begins as a thunderstorm over tropical waters
• Warm water heats the air above it and feeds the
hurricane.
• Warm air rises faster and faster
• Winds begin to bend into a spiral
• Winds move faster and faster around the center
(the eye of the hurricane)
• Over land or cooler water the hurricane loses
strength.
Hurricane damage
•
•
•
•
High wind damage
Heavy rain = Flooding
May produce tornadoes
Storm surge – the wall of water the
winds pushes onto land
• Can be most destructive and deadliest part
of a hurricane
3. Tornadoes
• A destructive, rotating
column of air with very high
winds
• Funnel-shaped cloud
Formation of a tornado
• Form when a thunderstorm meets
horizontal winds at high altitudes
• These winds cause the warm air
rising to spin
• The funnel cloud becomes visible
as it picks up dust
Tornado Alley
• Most common in the United states in the
Midwestern area
• Including : Iowa, Kansas, Nebraska, Ohio
• Danger is due to high winds.
• Can reach 400km/h
• Most injuries and deaths due to object blown
by the wind or trapped in building that
collapse.
Safety
1. Thunderstorm safety
A.
B.
C.
D.
E.
F.
Seek shelter immediately
Stay away from trees
Stay close to the ground
Get into a car
Stay away from water
Avoid using electrical appliances, running
water or phone lines
Safety
2. Hurricane safety
A. Have an evacuation plan
B. have an emergency kit already packed
C. Secure loose objects outside
D. Listen to news
E. Stay indoors away from windows
F. Evacuate when told to do so.
Safety
3. Tornadoes
A. Go to a place without windows
B. Go to basement, storm cellar or a closet
or hallway
C. If outside lie in a ditch or low-lying area
D. protect your head and neck with your
arms and hands
Sun safety
• Wear sunscreen at all times
• Wear protective clothing
• Limit outdoor activity
• Drink plenty of water