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title | Outline of exercises |
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Exercise 1. Visualise the ECMWF analysis of the St Jude storm
Objective: Understanding the formation of the storm
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Note |
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- Examine the map of wind-gust observations in the handout.
Note the observed area of strongest windgusts and their intensity. - How does the analyses compare with the observations?
- Understand the storm development and behaviour from the ECMWF analyses.
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Starting up metview
Code Block |
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title | Type the following command in a terminal window |
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metview |
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title | Metview icons |
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For this task, use the metview icons in the row labelled 'Analysis'
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Note |
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icon | false |
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title | Getting started |
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- Start with
an_1x1.mv with mapType=1 to see the large scale. Everyone should plot the mean-sea-level-pressure (mslp) and 10m wind-gust, over each 3hr period, (wgust10) plots. Remember you can overlay two or more variables as shown above and use animation. - Each team member can then choose their own parameters; look at the fields on different pressure levels; use the smaller geographical area (mapType=0) to compare with the observations.
- Discuss the storm characteristics and development.
If you prefer to see multiple plots per page rather than overlay them, please use the an_2x2.mv macro. |
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title | Plot analyses in various layouts |
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Icon 'an_1x1.mv ' produces a single plot on the page. Icon 'an_2x2.mv' can produce up to 4 plots per page. Info |
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| For the 'an_1x1.mv' icon, the plot contents can be changed by editing the plot1 variable in the macro. By default the 10m wind is shown. To alter the plotted field, right-click and choose 'Edit'. It is possible to overlay multiple fields like this:
You will find a list of available parameters in the macro. After editing the macro text, you can optionally save using the 'File' menu and 'Save'. Display the plot by clicking: Animate the plots in the display window by clicking |
Info |
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title | Change plot appearance |
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| The number of maps appearing in the plot layout can be 1, 2, 3 or 4. Macro an_2x2.mv demonstrates how to plot a four-map layout in a similar fashion to the one-map layout. The only difference here is that you need to define four plots instead of one. Right-click on the icon and select 'Edit'. Change the plot layout like this:
Two map types are available covering a different area.
With mapType=0, the map will cover a smaller geographical area centred on the UK. With mapType=1, the map will cover most of the North Atlantic |
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Note |
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- Examine windgust observations. Note the observed area of strongest windgusts and their intensity. How does the analyses compare with the observations?
- Understand the storm development from the ECMWF analyses.
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icon | false |
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title | Team : Getting started |
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- Start with
an_1x1.mv
with mapType=1
to see the large scale.
Everyone should plot the mean-sea-level-pressure (mslp) and 10m wind-gust, over each 3hr period, (wgust10) plots. Remember you can overlay two or more variables as shown above and use animation. - Each team member can then choose their own parameters; look at the fields on different pressure levels; use the smaller geographical area (mapType=0) to compare with the observations.
- Discuss the storm characteristics and development.
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Task 2: Visualise operational HRES forecast
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