An 'Arctic Blast' caused by low pressure over Scandinavia and high pressure over Greenland and the Atlantic forced air from the Arctic down into Europe, via the British Isles. On the 6th April, the warm April sun heating the ground under the cold air caused convective showers to form, which seemed to get more powerful throughout the day. These convective showers would hit us around every hour and to add to the fun, they dropped heavy snow instead of rain.
Powerful updraughts and evaporative cooling under the showers made for a very cold and windy environment for the places they rolled over. In the video above you can see my experience of one of the later showers around 17:45, where I was battered very suddenly by strong wind and heavy snow.
Outside the showers, incredible cloudscapes were on every horizon, with towering 'Cumulus Congestus' clouds shrouding the ground beneath in that deep-blue, purplish hue signifying heavy precipitation, as seen in the above photos.
Snow SlowMo:
Recording Evaporative Cooling:
As 4D video hasn't really taken off, conveying a temperature change over video is a very difficult task. In the past I have simply timelapsed the thermometer like when I did the Cold Front Timelapse; and to an extent that is what I did this time too. However, unlike a cold front, there is actually quite a visual element to evaporative cooling during a snow shower, and that is the snow shower itself. To tackle this, I framed a shot where both the snow shower and the thermometer is visible, set it recording as a snow shower approached and timelapsed and graphed the result:
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