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 Cloud Types There are many different types of clouds. Cirrus 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, high- and 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