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Section 12.4 – Weather Analysis and Prediction

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Presentation on theme: "Section 12.4 – Weather Analysis and Prediction"— Presentation transcript:

1 Section 12.4 – Weather Analysis and Prediction
8th Grade Earth and Space Science Class Notes

2 Wednesday, 5/8 Warm – Up Explain what happens at a cold front. How is a cold front represented on a weather map? Write down the HW. Learning Goal – Identify the various ways that weather data is collected. Agenda Warm-Up Question/Review HW Class notes/discussion of Section 12.3 Work on Weather Data WS (pg. 38) and 12.3 Review (pg.42) Homework Air Mass WS and Section 12.1 Review due by Friday, 5/10 Global Wind Systems WS and Section 12.2 Review due by Friday, 5/10 Weather Data WS (pg. 38) and Section 12.3 Review due by Friday, 5/10

3 Station Models A record of weather data for a particular site at a particular time Uses meteorological symbols (see Figure 12.17) for example All meteorologists to have a convenient and efficient way to share data

4 Plotting Station Model Data
Meteorologists use lines to connect points of equal or constant values. Isobars – lines of equal pressure Isotherms – lines of equal temperature

5 Interpreting Station Model Data
Isobars that are close together indicate strong winds Isobars that are far apart indicate light winds Indicates high and low pressure systems

6 Digital Forecasts Created by applying physical principles and math to atmospheric variables and making a prediction about how these variables will change over time Main method used by present day meteorologists

7 Analog Forecasts Based on comparison of current weather patterns to those of the past Useful for conducting monthly or seasonal forecasts

8 Short-Term Forecasts One to three days based on behavior of larger surface and upper-level features (low pressure, high pressure, etc.) Usually accurate for temperatures and precipitation

9 Long-Term Forecast Less reliable than short-term forecasts
4-7 day forecasts rely on circulation patterns in the troposphere and upper stratosphere Forecasts for months or seasons are based on weather cycles or patterns

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