Waec Model Questions Vol1 2019 Geography Question 4

Practice essay / theory question 4 from the 2019 Waec Model Questions Vol1 Geography examination. This question covers Weather, Isobars, Wind, Pressure Gradient .

Waec Model Questions Vol1 2019 Geography Essay / Theory
Topics: Weather Isobars Wind Pressure Gradient
Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • GEOGRAPHY • essay

A synoptic weather chart for the West African region shows the following data: - A closed isobar of 1010 hPa over Lagos. - A closed isobar of 1002 hPa over Accra. - A closed isobar of 1006 hPa over Kumasi. - The isobars form a roughly semi‑circular pattern with the lowest pressure centre over Accra. - Wind barbs on the chart indicate winds blowing from the northeast over Lagos and from the southeast over Kumasi. Answer the questions below:

Question Parts

( a )
Identify the type of pressure system represented on the chart and justify your answer.
( b )
Using the isobar values, estimate the magnitude of the pressure gradient force (PGF) between Lagos and Accra. Assume the straight‑line distance between the two cities is 460 km and use PGF ≈ Δp / Δd, where Δp is the pressure difference in hPa and Δd is the distance in km.
( c )
Explain why the wind direction over Lagos is from the northeast even though the pressure gradient points towards the southwest.
( d )
Predict the likely weather conditions (e.g., cloud type, precipitation) over Accra and justify your prediction using the chart information.

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About This Question

This is Waec Model Questions Vol1 2019 Geography Question 4. It is one of the essay questions from the 2019 Waec Model Questions Vol1 Geography examination.

The question covers Weather, Isobars, Wind, Pressure Gradient .

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