Cloud motion¶

• September 2nd 2020, 13:00 - High windshear between the lower and upper cloud decks. This condition is relatively common over the UK, although it can be difficult to observe without a timelapse. High windshear often signals the approach of front.
• October 29th 2019, 14:00 - Another high windshear case, with the cloud motion almost reversed between the lower and upper layers.
• May 25th 2020, 15:00 - Almost stationary cumulus on a sunny afternoon. Try following an individual element until is dissipates. The majority of clouds worldwide disappear by evaporating, rather than raining out.
• January 15th 2021, 14:00 - A timelapse inside a storm, complete with rotation and outflow visible at higher levels.

Sunrises¶

Who doesn't like a nice sunrise? The camera is positioned so that it views towards the morning sun.

• February 20th 2021, 07:00 - One of the more spectacular sunrises, with the sun directly behind the Queen's tower.
• February 22nd 2021, 07:00 - The southern UK along with much of western Europe has been covered by a dust plume from the Sahara, leading to this rather dim and dusty sunrise.
• October 10th 2019, 07:00 - The first sunrise recorded by the camera and still one of the best

Contrails¶

• March 17th 2020, 06:00 - A mid-March sunrise over London. The contrails appear brighter as they are higher and so already lit by the sun. Air traffic at Heathrow was already beginning to reduce sharply by this point in 2020, but was still around 50-70% of normal levels.
• March 26th 2020, 06:00 - Sunrise over London with cirrus and contrail shadows on upper layers of cloud. Taken shortly after the start of the coronavirus shutdown, so there is unfortunately a number of smudges on the window that I forgot the clean before leaving...
• June 1st 2020, 05:00 - Early morning cirrus and contrails. Note that although there was a large reduction in passenger travel during the coronavirus pandemic, cargo flights are still common (as seen here).
• September 10th 2020, 06:00 - Sunrise with a single aircraft. Mostly generates a limited contrail, but passes through a small supersaturated region, generating a contrail that persists for 5-10 minutes.