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Weather Patterns
Table of Contents
Clouds
Precipitation
Air Masses and Their Movements
Storms
Predicting the Weather
Clouds
How Clouds Form
Clouds form when warm, moist air rises and cools.
Clouds
Cirrus
Cloud Types
There are many
different types of
clouds.
Cirrocumulus
Cumulonimbus
Altocumulus
Altostratus
Cumulus
Nimbostratus
Stratus
Fog
Clouds
Clouds and Weather
What kind of weather can be predicted from each type of cloud?
Precipitation
Rain Gauge
The rain gauge, measuring in
centimeters, collects ten times
the actual depth of rain that
falls.
Precipitation
Water Droplets
Cloud droplets condense to become larger droplets.
Precipitation
Freezing Precipitation
What would be the air and ground temperature ranges for each type of
precipitation?
Air Masses and Their Movements
Types of Air Masses
Air masses can be
classified according to
temperature and humidity.
Air Masses and Their Movements
North American Air Masses
Air masses can be warm or cold,
and humid or dry.
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?
Air Masses and Their Movements
Which circles are low-pressure centers and which are high-pressure
centers?
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?
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?
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.
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
Storms
Types of Tornado Damage
Predicting the Weather
Red Sky
Many people use creative thought to summarize their own observations of
weather.
Predicting the Weather
Weather Map Symbols
The tables below show what various weather symbols represent.
Predicting the Weather
Newspaper
Weather Map
The symbols on this map
show fronts, highand low-pressure areas,
the
high and low
temperature readings for
different cities, and
precipitation. The color
bands indicate different
temperature ranges.
Predicting the Weather
Weather Map