Low Carola is deepening very quickly at the moment, and the curl of cloud she is spinning up makes an impressive site in the latest satellite imagery to the southwest of Ireland (fig 1), as do the plotted observations and barograph from the weather buoy 62029 better known as ‘K1’ (figs 2 & 3).
As far as I can see Carola easily breaks the barrier for rapid cyclogenesis of 24 hPa in 24 hours, the pressure there has fallen by 37.4 hPa in 12 hours, in fact I don’t think I have ever seen sustained pressure falls like that on a chart from an extra tropical low.
No doubt the French will have claimed this low and come up with their own name for it, but I noticed it didn’t even get a mention in the BBC forecast at 12.58 pm from Sarah Keith-Lucas.
Rather more geographical than meteorological I know, but I think I’ve identified these four snow-covered mountain ranges in Spain which are standing out so well on today’s satellite picture (fig 1). I reckon that after a bit of research they are:
The snow-covered mountains close to the south coast are of course the Sierra Nevada’s or ‘snowy mountains’ in Spanish, which for some reason I had always believed lay further west. The highest point is Mulhacén at 3,478 metres which is also the highest point of continental Spain.
An interesting satellite picture day of clouds across the bay of Biscay from the NOAA Worldview website (fig 1). If anything, the grey scale image from the Met Office taken a little later looks even better (fig 2). As far as I can tell it all looks like a sheet of low stratocumulus cloud at under the anticyclone, with a cloud base of around 4,000 feet, but I could be wrong.
A great visible satellite image of an almost cloudless Scandinavia covered in a winter mantle of ice and snow. Part of the ice in the northern Baltic seems to have been become detached from the shore due to the recent strong northerlies, and has opened a clear patch of water.
Strange goings on in the Sahara desert south of Cairo (fig 2).
What looks like medium level altocumulus, but’s probably a much lower sheet of stratocumulus to the north of the Canary Islands (fig 3).
An interesting visible satellite image for 0845 UTC this morning looking across the North Sea, Baltic and into western Russia with its snow cover. All eyes are now set to the east, on what could be a very eventful week weather-wise.
Lovely morning down here in the southwest, but the wind is adding a bit of a bite to it even so, with a-5.6°C wind chill at nearby Dunkeswell at 10 UTC (fig 1). The SC sheet that’s lying across northern England and Wales seems to be aligned with the lighter winds down the axis of the ridge (fig 2).
There’s talk of a SSW event later in the month, which may explain why the GFS model has been in a total quandary for a while now, with little consistency from run to run beyond T+120.
Classic picture of the snow over Scotland earlier today thanks to this NASA visible satellite image from earlier today (fig 1). Most of the country is under snow, and over higher ground that’s now a very deep cover, it’s not that often that the Isle of Lewis gets a complete cover of at least 8 cm like it has, but rather strangely most of Aberdeenshire is snow free. There are Cumulonimbus clouds and associated snow showers pushing south across the northern Isles, and some broken frontal cloud across the southwest.
Temperatures at many places across the north have stayed sub-zero today, and at Altnaharra at 15 UTC it’s -5.6°C. The 35 cm snow depth at Tulloch Bridge is slightly less than it was yesterday, this due to consolidation rather than any thawing (fig 2).