All’s not lost – well not quite
The NWP of the last week have been united in showing how, after the current anticyclonic easterlies collapses later this week, they will be …
Circulation
Jan 2021 – circulation
The reasons why northern Scotland saw its coldest January since 1985 are self evident when you look at the mean pressure charts for January. …
First hints of an easterly?
I may be clutching at straws as to what might come next this winter here, but there are the first signs of an easterly …
Mild air pushes into eastern Europe
Storm Christoph has made short work of the short cold spell that had become established across Scandinavia and eastern Europe since the New Year, …
Depressing outlook all bar Thursday
The weather looks depressingly like a very average kind of January for the next ten days or so, thats according to the ECMWF model, …
How to recreate a plotted weather chart from 1963 with observations from the Daily Weather Report
How to recreate plotted weather charts with observations from the Daily Weather Report – yes it’s rather a mouthful as titles go but it’s …
They thought it was all over…
The SSW event that occurred just after the New Year has been somewhat underwhelming in reinvigorating the Christmas cold spell across IONA, but there …
December 2020 – monthly mean pressure
Mean pressure anomalies for December across IONA were as much as 12 hPa below average. That combined with +10 hPa anomalies in the western …
2020 monthly circulation
Arguably the best weather in 2020 occurred during the very dry and sunny anticyclonic spell during April and May. The mild wet and windy …
Last 12 weeks circulation
In these weekly mean pressure charts it’s very easy to see the mild spell and strong southwesterlies that occurred in mid December followed by …
Winds veer into east as SSW gets underway
So it looks highly likely that an SSW event will get underway for the start of the New Year, the Met Office reaffirming today …
SSW imminent according to Met Office
Opposing forces battle for winter supremacy Posted by the Met Office Press Office on the 30th December, 2020 Courtesy of Met Office
Winds continue to veer in the coming week
The circulation over the next ten days across the UK will continue to become less cyclonic and more anticyclonic as winds gradually veer into …
Well and truly blocked into the New Year
The North Atlantic looks well and truly blocked well into the New Year according to the latest run of the ECMWF model, and eventually …
Something in the air
Both the GFS and the ECMWF models are promising a change of type between Christmas and New Year reversing the zonal westerly into a …
Higher than average pressure during November 2020
The band of higher than average pressure during November 2020 that stretched from the central Atlantic (+9 hPa) into central Europe (+8 hPa) explained …
Higher than average pressure during November 2020 Read More »
October 2020 – circulation
It’s no big surprise why October 2020 was so wet across IONA when you look at the MSLP anomalies across the northwest of Europe. …
Rise in pressure of 63.7 hPa in just 66 hours at Stornoway
There might be another SYNOP station with a slightly larger rise in pressure than the one at Stornoway, but the steady rise of 63.7 …
Rise in pressure of 63.7 hPa in just 66 hours at Stornoway Read More »
Change of type signalled for early November
A change of type is coming hard on the heels of a string of fierce extratropical lows that ushers in the start of November, …
Why has October 2020 been so cold?
Why has October 2020 been so cold up until now? The reason why temperature anomalies have been three degrees below average across central France …
Recent circulation indices
An abrupt start to autumn 2020 is evident in these six charts of various objective LWT circulation indices since the 7th of July 2020. …
A change of type by mid-week?
A change of circulation type is underway during the coming week, that’s according to the latest NWP forecast from the ECMWF hires model, and …
A taste of what’s to come this Autumn?
The one thing that you can never say about the weather across IONA is that it’s ever boring. After an eight day heat wave …