Chapter 3 Weather Patterns Weather Satellites n take

Chapter 3 Weather Patterns

Weather Satellites n take pictures of Earth n collect information about weather n measure moisture in air & temperature n send to weather station

How Clouds Form 1. Water EVAPORATES from the Earth’s surface and rises into the air. 2. Warm air expands and cools. 3. Water vapor CONDENSES into tiny droplets to form clouds.

Cloud Families n. Cumulus n. Stratus n. Cirrus

Cumulus Clouds n puffy n look like cauliflower n occur in sunny weather n average height in sky n form when warm, moist air rise upward from Earth’s surface

Stratus Clouds n often bring rain n flat gray layers n look like blankets covering the sky n low to the ground n form when a flat layer of warm, moist air rises very slowly

Cirrus Clouds n bring rain or snow n look like feathers, wisps of hair, or commas (, ) n high in the sky n form when warm, moist air rises high enough for ICE CRYSTALS to form

What’s in a Name? n Nimbus – means rain cloud Cumulonimbus - thunderstorms with rain, snow, or hail n Cirro – form high in the sky n Alto – form at medium height in the sky

Weather Predictions n weather forecaster – someone who makes predictions about the weather (using maps, satellite images, etc. )

Weather Maps n air mass – body of air that has the same temperature throughout n front – a place where two different type of air masses meet n weather map fronts: http: //maps. wunderground. com/data/640 x 480/2 xus_sf_ani m. gif

Cold Front – Weather Map n Cold front – forms when cold air mass moves into warm air n Warm front – forms when warm air moves into cold air n Reading Weather Map Activity: http: //www. dnr. sc. gov/climate/sco/Education/wxmap. php

Severe Weather Safety United Streaming Videos: n Severe Weather Safety: Watch for the Warning [18: 07] n Hurricanes, Tornadoes, and Thunderstorms [24: 00]