Air Masses of North America

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Air Masses and how they control our weather. Air Mass An air mass is a body of air with similar properties throughout. Similar temperature. Similar moisture.

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Presentation transcript:

Air Masses of North America

Air Masses Important Air Masses Effecting Chicago Continental Polar Canadian: brings cold air in winter time. Alberta Clipper Maritime Polar Pacific: brings mild winter weather with moisture. Summer cool weather Maritime Tropical Atlantic: brings warm moist air from Gulf of Mexico in Summer.

High Pressure Systems High Pressure system: Cool dense dry air. Winds rotate clockwise around high pressure system. Average Barometric Pressure is 29.92 inches or 1013 milibars.

Low Pressure Systems Warm Front the leading edge of a low pressure system. Cold Front the trailing edge of the low pressure system

Weather Data Air Temperature: The temperature of the Atmosphere measured in degrees of Fahrenheit. Barometric Pressure: Is the measure of air pressure. A drop in air pressure indicates the an approaching front Dew Point: The temperature at which the atmosphere becomes saturated. The higher the Dew Point the more moisture is in the air. Wind Direction/Speed: The speed of the wind and the direction the wind is coming from. A change in wind direction or increase in speed indicates an approaching front.

Weather Data chart