The stratosphere has undergone warming over the UK and northern parts of the Atlantic, as well as Europe over the past few days. Here's the temperature chart for 10mb (about 100,000ft). You can clearly see the warming that's been happening now. That enhances the development of high pressure and generally serves

Mid January is here and have you noticed how the days are getting ever so slightly longer? I think we'll notice it more this week, especially as cloud gives way to sunshine for some of us as the week progresses. That increases the risk of frost (see below). So, here are the

The 240hr from midday Sunday's ECMWF shows a west to southwest winds through the UK,. But this ain't no mild flow. Trace back the isobars into the Atlantic west of Ireland, then northwards to the west of Iceland, then north again to east of Greenland. 850mb temperatures showing 0C, but those falling from