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Understanding Pressure Maps in Meteorology

Explore the importance of air pressure in weather forecasting through pressure maps and isobars. Learn how to interpret wind direction and speed based on pressure differentials and isobar intervals.

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Understanding Pressure Maps in Meteorology

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  1. Day 43 Investigation 8 part 4 Pressure Maps

  2. Pressure Map of the US Weather maps are used by meteorologist Information is gathered from weather balloons, satellites, and other weather sources Air Pressure is very IMPORTANT

  3. Pressure Maps and Isobars Low Pressure #’s represent atmosphere pressure in millibars Lines are isobars Iso - samebar - pressure Connect all recording stations where the atmosphere pressure is the same High Pressure

  4. Low and High Pressure Readings Lowest Pressure984 mb Highest Pressure1032 mb

  5. Which way does the wind blow? From Billings to Kansas City? From Kansas City to Billings? The wind blows from Kansas City to Billings

  6. Which way does the wind blow? From Kansas City to Buffalo? From Buffalo to Kansas City? The wind blows from Kansas City to Buffalo

  7. Isobar Intervals Why is pressure difference between adjacent lines always the same but the distance is not? Shows how fast the pressure is changing What is the difference between isobar lines? 1032 mb - 1028 mb = 4 mb

  8. Isobar Intervals What do you think it means when the isobar lines are close together Rapid change in pressure What do you think it means when the isobars lines are far apart? Gradual change in pressure

  9. Isobar Intervals What can the distance between isobars tell us about how fast the wind is blowing? Isobars are close together, pressure changes quickly from one location to another Wind speed will be highest between two locations where isobars are close together

  10. High & low pressure on a weather map shows where air flows from • High-pressure to low-pressure • Air movement is called wind WIND

  11. Isobar Intervals • High and Low pressure on a weather map shows us where air flows from areas of high pressure towards areas of low pressure • The air movement is called wind

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