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Re-visualise the 500 hPa temperature ODB data with vis_temp' and drag the Symbol Plotting, Coastlines, Legend and Text Plotting icons into the plot again. To overlay the 500 hPa temperature forecast we need to filter the matching filed field from the GRIB file. The 't500_fc' GRIB Filter icon is already already set up to perform this task. Just drag it into the plot, then drag the 't_cont' Contouring icon into the plot as well to customise the contour lines.
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