In the northern hemisphere, as this chart is, wind flows along the isobars, anti-clockwise around low pressure zones and clockwise around highs. That explains the wind arrows given on the annex above. This means that the stark change in the direction of the isobars causes a stark change in wind direction also. As we fly through the front, this is a change in direction in the anti-clockwise sense (known as "backing"), from approximately 280° (NW) to approximately 230°(SW).

The isobars are also closer together after the second cold front, meaning that the wind speed is higher in this region, and therefore the wind gets faster after passing through the cold front.

The cold front is moving from West to East in the diagram, as is expected with a front in this region (and shown by the direction of the "spikes" on the front. This means that "in front" of the cold front is the Eastern side of it, and "behind" the cold front is the Western side. Our track means that we "overtake" the front, starting behind it and passing through it to end up in front of it.