Transcript Weather & Climate - Rocklin Academy Meyers

Weather & Climate
Severe Weather
Objectives
• List and describe the main types of storms
and explain how they form.
• List and describe basic safety for severe
weather situations.
STORMS
• A storm is a violent disturbance in the
atmosphere.
• They involve sudden changes in air
pressure.
• Changes in air pressure causes rapid air
movement.
Thunderstorms
Formation
Temperature Precipitation Safety
•W/in large
cumulonimbus,
or
thunderheads
•Form when
warm air is
forced upward
at a cold front
•Hot, humid
•Heavy rainfall
afternoons in the •Sometimes hail
spring and
summer
•Avoid
touching
metal objects
•Install metal
lightening
rods
•Find a low
area away
from trees
•Stay away
from water
Thunderstorms
• During a thunderstorm, positive and negative
electrical charges build up in the clouds.
• The discharge of the electricity between clouds
is lightening.
• Lightening is as hot as 30,000°C, hotter than the
sun.
• The heated air expands and explodes producing
thunder.
Tornado
• Rapidly whirling, funneled-shaped cloud that
reaches down from a storm cloud to touch
Earth’s surface
• Most frightening & disruptive storm
• Usually brief, touching the ground approx. 15
minutes or less
• Wind speeds may reach 480 km/hr
Tornado
Formation
Temperature Precipitation Safety
•Develop in
low, heavy
cumulonimbus
clouds
•When warm
dry air mass
and cool air
mass collide
•Warm humid
•Heavy rain and
air
wind
•Spring and
early summer
when ground is
warm
•Listen for
watches &
warnings
•Basement
level, or to the
middle room
on ground
floor
•Stay away
from windows
•Lie in a ditch
Tornado
• Tornado Watch – tornadoes are possibly in
your area
• Tornado Warning – tornadoes have been
seen in the sky or on weather radar
• Occur most often in the US
• Approx. 800 tornadoes a year
Checkpoint
• Where do tornadoes
form?
• Why is there a tornado
alley?
• What states make up
tornado alley?
• Low heavy cumulonimbus
clouds
• Warm humid air mass
moves north from Gulf of
Mexico and meets a cold
dry mass that is moving
south from Canada
• SD, Iowa, Nebraska,
Kansas, Missouri,
Oklahoma, TX, NM, and
Arkansas
Hurricanes
• Tropical storm that has winds of 119
km/hr
• Usually occur between June and
November in the eastern US
Hurricanes
Formation Temperature Precipitation Safety
•Begins over •Warm
warm water as temperatures
a low pressure
area, tropical
disturbance
•Gets it
energy from
warm humid
air at the
ocean’s
surface
•Strong winds
•Rain which
generally causes
flooding
•Evacuate
•Move into
the interior
room and stay
away from
windows
Hurricanes
• Occur between June and November
• Effect people that live on the coast of the
Atlantic, Pacific, and Indian Oceans
• Eye – center of a hurricane
Winter Storms
• Lake-effect Snow – In the fall and winter, land
cools faster than the lakes.
• When cool air mass moves from Canada across
Great Lakes it picks up water vapor and heat from
lakes.
• After the air mass
passes the lakes it begins
to cool and the water vapor
condenses and falls as snow
What is it?
• A Blizzard is a
blinding snowstorm
with very strong
winds and cold
temperatures
When do they take place?
• Blizzards are storms that happen in the winter
months.
How do they occur?
• Blizzards occur when a warm air mass runs
into a cold air mass. Clouds form and the cold
air freezes the moisture in the warm air mass.
The wind speeds increase and snow falls to the
ground.
Where do they take place?
Safety Precautions
Find shelter indoors.
2. Stay away from windows and doors.
3. If you are stuck in a car with the engine running to stay warm, keep the
windows open a little bit. This will let poisonous carbon monoxide
escape from the inside of the car.
4. Keep extra food and water, flashlight, a battery-operated radio, and, if
possible, a cell phone with you.
5. If you are trudging through deep snow, keep moving. Do not lie down
to rest.
6. If you are caught outdoors, use clothing to cover your face and as much
of your skin as you can.
Your Assignments
• You will work in predetermined groups.
• Within your group, you will create a skit
demonstrating your knowledge on severe weather
safety.
– What is your severe weather?
– How does it occur?
– What are the safety precautions you should take if you
are inside/outside?
• You have 30 minutes before you present to the
class.