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Table of Contents
Clouds
Precipitation
Air Masses and Their Movements
Storms
Predicting the Weather
Weather Patterns
How Clouds FormClouds form when warm, moist air rises and cools.
Clouds
Cloud TypesThere are many different types of clouds.
Clouds
Cirrus
Cumulonimbus
Fog
Cumulus
Altocumulus
Altostratus
Cirrocumulus
Nimbostratus
Stratus
Clouds and WeatherWhat kind of weather can be predicted from each type of cloud?
Clouds
Rain GaugeThe rain gauge, measuring in centimeters, collects ten times the actual depth of rain that falls.
Precipitation
Water DropletsCloud droplets condense to become larger droplets.
Precipitation
Freezing PrecipitationWhat would be the air and ground temperature ranges for each type of precipitation?
Precipitation
Air Masses and Their Movements
Types of Air MassesAir masses can be classified according to temperature and humidity.
North American Air MassesAir masses can be warm or cold, and humid or dry.
Air Masses and Their Movements
Types of FrontsWhat type of weather is brought by each front?
Air Masses and Their Movements
Cyclones and AnticyclonesWhich image is a cyclone and which is an anticyclone? What is the air motion direction of each?
Air Masses and Their Movements
Air Masses and Their Movements
Which circles are low-pressure centers and which are high-pressure centers?
Lake-Effect SnowAs 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
Storms
How Thunderstorms FormA thunderstorm forms when warm, humid air rises rapidly within a cumulonimbus cloud. What is indicated by the blue and red arrows?
Storms
HurricaneWhere 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 FormationAbout 1,200 tornadoes occur in the United States every year. Weather patterns on the Great Plains result in a “tornado alley.”
Key
Types of Tornado Damage
Storms
Predicting the Weather
Red SkyMany people use creative thought to summarize their own observations of weather.
Predicting the Weather
Weather Map SymbolsThe tables below show what various weather symbols represent.
Predicting the Weather
Newspaper Weather MapThe symbols on this map show fronts, high- and low-pressure areas, the high and low temperature readings for different cities, and precipitation. The color bands indicate different temperature ranges.
Weather Map
Predicting the Weather