Super views of Noctilucent clouds this week. The very high wispy clouds are sometimes visible in the twilight skies of mid summer. Beautiful and eerie
It's that time of year. Noctilucent clouds are visible in June but rare enough to cause excitement. These high ice crystal clouds can only be seen in the midsummer twilight. Once the sun comes out the light is too strong for these delicate, pale threads to be seen, they need the semi-darkness. Usually, cloud viewed in high latitudes, they were seen in mid-June 2018 in Norfolk and the Netherlands with brilliant displays over northern Britan and Northern Ireland.
WMO Cloud Atlas Definition ; Clouds resembling wispy cirrus but usually with a bluish or silvery colour; they stand out against the dark night sky well past summer sunset because they are in the mesosphere.
High up in the atmosphere, near the top of a layer called the mesosphere, the air is very cold with ice particles from May through the summer months (in the northern hemisphere). Around mid summer with the sun just below the horizon, there is enough light to illuminate the clouds but dark enough skies to contrast and see them. They are also called Polar Mesospheric Clouds (PMCs), night-shining clouds and look out for #NCL or #NCLnow for the next view
These clouds are studied closely as they are sensitive to changes in the upper atmosphere, giving clues for climate change research. There are suggestions that noctilucent clouds are being seen more often, as they are brighter, is that part of climate change with more CO2, CH4 and CFCs altering all layers of the atmosphere?
WMO "Noctilucent clouds are composed of very small water ice crystals formed on minute particles of dust, possibly of cosmic origin from micrometeors".
If you did see, or have any photos, you can share in the Netweather community Forum Noctilucent Clouds thread
Rain has arrived here as well. Initial rain is not expected to be heavy but more expected later leading to an unsettled few days. Yellow warning for rain and wind issued for Friday but not affecting our region yet.
Some rain started at 11am. Wind dropped at present. 3.5C. Still gloomy.
I’ve been having discussions on weather communities on social media about how the current economic and political climate worldwide has made us more sensitive to poor weather.
Like it seems other naff years fly under the radar as they happened during...
lassie23 they are; some like cold, some like hot and some are just lukewarm 🙂
Yellow weather warning now in place for Friday for rain in C & S Scotland, and wind in Wales, NI and S Scotland.
The Tall Weatherman yes indeed 🙂