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Rainfall and Pressure

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Broad General Education (BGE)

Fourth Level: People, Place and the Environment

I can demonstrate an understanding of weather and climate by explaining the relationship between weather and air pressure.

  • Explains links between weather and air pressure

A data based resource looking at rainfall and pressure: Worksheet below and Teachers Notes

Alternative resource: Red sky at Night, Shepherd’s Delight worksheet and Teacher’s Notes – a resource looking at how our prevailing wind direction means this saying is largely true.

Name:                                                                                                                                      Date:

Investigating the Link Between Between Pressure and Rainfall

Here is some data collected by a weather station on the outskirts of Edinburgh, at the start of 2019.

pressure rainfall data

Using this data, draw a graph of rainfall against pressure.

blank graph paper

Now use this information to complete the following sentences:

The most it rained in one day was _______________mm.

It didn’t rain at all on ____________ days.

The highest pressure recorded was ______________hPa (a hPa is the same as a millibar).

The lowest pressure recorded was _______________hPa.

Does it always rain when the pressure is low? Use figures to justify your answer.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Does it ever rain when the pressure is high? Use figures to justify your answer.

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Many weather apps assume that if the pressure is low, it will rain. Does your graph justify this assumption?

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Extension:

Here are the weather maps for 4 of the days when it rained: the first 3 show when the pressure was low and the 4th shows when the pressure was high and it rained.

weather charts

Start exploring

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