Transcript File - Ms. D. Science CGPA

Weather Patterns
Table of Contents
6.4
Storms
How Do Meteorologists Predict Weather?
Ms. De Los Rios
6th Grade
Vocabulary 6.4
1. Storm- A violent disturbance in the atmosphere.
2. Thunderstorm- A small storm often accompanied by heavy
precipitation and frequent thunder and lighting.
3. Lightning- A sudden spark, or energy discharge, caused when
electrical charges jump between parts of a cloud, between
nearby clouds, or between a cloud and the ground.
4. Hurricane- A tropical storm that has winds of about 119 km per
hour or higher.
5. Storm Surge- A “dome” of water that sweeps across the coast
where a hurricane lands.
6. Tornado- a rapidly whirling, funnel-shaped cloud that reaches
down to touch Earth’s surface.
How Do the Different Types of Storms Form? Pg. 209
A storm is a violent disturbance in the atmosphere.
•
Storms involve sudden changes in air pressure, which cause rapid air
movements.
Types of severe storms:
Winter storms, thunderstorms, hurricanes, and tornadoes
Winter Storms
• In Fl, (little snow), but in northern U.S. has large precipitation of snow.
• Winter storms involve snow.
• All year round, most precipitation begins in clouds as snow.
• If the air is colder than 0ºC all the way to the ground, the
precipitation falls as snow.
Storms
Lake-Effect Snow
As cold, dry air moves across the warmer water, it becomes more humid as water vapor
evaporates from the lake surface. When the air reaches land and cools, lake-effect snow
falls. Which cities receive lake-effect snow?
How Do the Different Types of Storms Form? Pg. 210
Thunderstorms
A thunderstorm is a small storm often accompanied by heavy
precipitation and frequent thunder and lightning. pg. 211 cause of thunder
Lightning is a sudden spark, or electrical discharge, that jumps
between parts of a cloud, between nearby clouds, or between a
cloud and the ground.
Did you know how a fulgurite is form?
Thunderstorms form in large cumulonimbus clouds, also
known as thunderheads.
•
Read fig. 2
Storms
How Thunderstorms
Form
A thunderstorm forms
when warm, humid air
rises rapidly within a
cumulonimbus cloud.
What is indicated by the
blue and red arrows?
Thunderstorm Damage
river/stream banks overflow
• Flood low-lying areas
Urban areas, ground is
saturated causing floods in streets, parking lots, and residential
areas.
• Lightning can strike the ground/trees
and start fires.
• Lightning strikes can hurt people of
animals
pg. 211
How Do the Different Types of Storms Form? Pg. 212
Hurricanes
A hurricane is a tropical cyclone with winds of
119 km/h or higher.
They form in:
Atlantic=Hurricanes
Pacific= Typhoons
Indian oceans= Cyclones
A hurricane begins over warm ocean water as a low-pressure area, or
tropical disturbance. Read fig. 4
Tropical disturbance tropical storm Hurricane
The low pressure and winds of a hurricane can cause storm surge, a
“dome” of water that sweeps across the coast where the hurricane
lands.
Storms
Hurricane
Where is the eye of the hurricane? Where are the strong and weak areas?
Storms
Hurricane strength is ranked on
the Saffir-Simpson Hurricane
Scale.
Hurricane Damage:
•Flooding
Beach erosion
•Storm surge
destroy buildings
Erode coastlines
How Do the Different Types of Storms Form? Pg.
209
Tornadoes
• A tornado is a rapidly whirling,
funnel-shaped cloud that reaches
down from a thunderstorm to
touch Earth’s surface.
• Tornadoes most commonly
develop in thick cumulonimbus
clouds—the same clouds that
bring thunderstorms.
• Cumulonimbus clouds form on hot
humid afternoons/evenings when
warm air is forced upward along a
cold front.
Storms
Types of Tornado Damage
Storms
Tornado Formation
•About 1,200
tornadoes occur in
the United States
every year.
•Weather patterns on
the Great Plains
result in a “tornado
alley.”
Key
Air Masses and Their Movements
Types of Fronts
What type of weather is
brought by each front?
Air Masses and Their Movements
Cyclones and Anticyclones
Which image is a cyclone and which is an anticyclone? What is the air
motion direction of each?