xmetman Blog

From the ashes…

This is the new and revamped xmetman site. It will be blog but without the comments as in the last one – the continual feuding that went on in the majority of comments that I received about AGW made a complete nonsense of a site that was dedicated...

DataPoint is dead long live DataHub!

The writing has been on the cards for a long time regarding the future of DataPoint. It’s now official that the service will close shortly to be replaced by a new service called DataHub, the big difference is that from the look of things it’s only forecast NWP...

Winter 2017-18 snowiest in five years

The winter of 2017-18 was the snowiest since 2012-13 in Central England according to my calculations of daily EWP and CET. It may have been cold in February and March but there was little in the way of precipitation.

Gordon Manley

The warmest and coldest 30 day spells since 1772

Warm and cold spells don’t always correspond with the start and end of any particular month and that’s true of the monthly CET series devised by Gordon Manley. The daily series, which is maintained by the Met Office extends back to 1772, is even more useful, so I...

Hurricane Katrina

2018 Hurricane season

The updated HURDAT2 through 2018 for the Atlantic basin is now available to download. Here’s a closer look at the 2018 season. There were eight hurricanes in all but just Michael made it to category five. Hurricane Leslie lasted for twenty two days before dissipating. Four tropical cyclones...

Recent North Atlantic SST

The cold pool in the central western Atlantic just about managed to survive through the winter of 2018/19. Meanwhile in the eastern Atlantic, North Sea, Baltic and Norwegian SST anomalies are already well above normal by April. This animation I’ve cobbled together from the map room at the...

Hot summers in Central England

There was a lot of talk in the media last year about the summers heat wave (2018) and comparisons with 1976. Here is a table of the top thirty warmest seven day periods since 1772 that I have extracted from the daily Central England Temperature [CET] series maintained...

May 1896 most anticyclonic

Looking at the Jenkinson Lamb objective weather data from the CRU at the UEA, I find that May 1896 was the most anticyclonic across the British isles in the record that started in 1871. I’ve gauged this on the combined frequency of the daily anticyclonic or hybrid anticyclonic...

Cold start to May in the north

It’s been quite a cold start to the month of May 2019 and their is a decent snow cover down to 2500 feet on Ben Wyvis in recent days. That’s not so surprising as the 1000-500 hPa partial thickness has been sub 528 Dm for the last week...

This year’s UK extremes so far

Here are this year’s extremes for air temperature, sunshine and rainfall I’ve extracted from the SYNOP data that I download courtesy of the OGIMET site. I forgot I had written this application so this post is as much as a reminder to me to use it every now...

Which one is February and which May?

You may be surprised to find that the plotted chart on the left is for the 9th of May, whilst the one on the right is for the 25th in the record warm spell at the end of February [2019] over 10 weeks earlier. Such are the vagaries...