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Published byChristina Ball
Modified over 5 years ago
Fronts When 2 air masses meet density differences keep them separate Front- boundary between air masses 100’s to 1,000’s of miles wide
Cold Front Cold air mass overtakes a warm air mass Cold air lift warm air up Short lived Violent
Squall line – long line of heavy thunderstorms
Warm Front Front edge of an advancing warm air mass Cold mass retreats from an area Precipitation over a large area
Stationary Front Fronts either move very slow or don’t move
Occluded Front Cold air mass overtakes warm air mass Lift warm air up above
Polar Front Cold polar air meets warm tropical air
Midlatitude Cyclone Low pressure Rotating wind Moves towards the rising air of central low pressure regions
Midlatitude Cyclone Stages
Anticyclone Air sinks and flows outward from a center of high pressure Clockwise in NH Dry weather
Thunderstorms Heavy storm with rain, thunder, lightning, and winds 3 stages: 1. Cumulus – warm moist air rises 2. Mature – dark cumulonimbus (heavy rain) 3. Dissipating - end
Lightning Clouds discharge electricity Rapid expansion of air – thunder Lightning fun facts!
Hurricanes Tropical oceans 120 mph winds in a spiral Intense low pressure
Winds increase towards the center – eye Eye – calm sinking air Storms surge – rising sea level
Tornadoes Rotating column of air High winds Funnel-shaped 400 km/hr Thunderstorm meets a high altitude horizontal wind
Ch. 13 – The Nature of Storms
Air Masses, Pressure Systems, and Frontal Boundaries
Hurricanes. Midlatitude Cyclones vs. Tropical Storms Midlatitude Cyclones Cover large area Have cold fronts and warm fronts Less violent (except.
Weather Patterns. Air masses Changes in the weather are caused by movements of large bodies of air called air masses. Air masses usually cover thousands.
21.2 FRONTS Chapter 21 – Weather Cooler air is denser and often does not mix with warmer air… Thus a FRONT FORMS !
Chapter 24 Section 2 Handout
Warm up Activity Warm up question: What is a wave cyclone
A cold front moving in brings stormy weather
Weather Air Masses Weather.
Weather Patterns and Severe Storms Chapter 20
An immense body of air that is characterized by similar temperatures & amts. of moisture at any altitude As air masses move the characteristics of an.
Develop and use models to explain how relationships between the movement and interactions of air masses, high and low pressure systems, and frontal boundaries.
Standards 5a. Students know how differential heating of Earth results in circulation patterns in the atmosphere and oceans that globally distribute heat.
17.1 – Air Masses and Fronts An air mass is a huge body of air that has similar temperature, humidity, and air pressure throughout.
Objectives: Identify two types of pressure systems. Identify two types of pressure systems. Identify and describe what causes weather patterns. Identify.
Weather Chapter 24.
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