Update on the change to wintry weather next week.

Update on the change to wintry weather next week.

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A few days ago I indicated we would see some wintry weather next week.

A large low pressure system will be moving Eastwards towards Iceland. During Monday we will see some very breezy conditions with rain and showers, temperatures will be reach 8 possibly 9 centigrade. During the evening we will start to see colder air moving down over the UK. It looks like the -5 c line at 1,500 metres will move over our area turning the rain to snow.

It looks like we will see wintry showers sometimes turning heavy and prolonged. The wintry weather looks like it will possibly last through the week and into the weekend.

This first image, the 850 hpa for midnight Tuesday 16th, shows the temperature at 1,500 metre’s and if you trace the contours all the way back to Greenland, it shows it will be bringing cold air down to the UK. If you look you will see a dotted like over the UK this is the -5 c line at the height of 1,500 m. This is the first indication there could be a risk of snow.

The second image is the 850 thickness line, now this shows the temperature should be -6 c at 1,500 m and the thickness line is  below 528, this is another indication that there is a risk of snow.

 

The third image shows Dew point and this is around 0 c. Again this gives us another indication that there is a risk of snow. So putting the 3 criteria’s together this increases the risk.

More updates to follow over the coming days.