"Freddie" wrote in message
...
There is a large cyclonic block over Spain presently, with an upper
anticyclone over southern Scandinavia. This means that the flow through
the troposphere over the UK is from the east at the moment. It is this
flow that is steering fronts westwards across the UK. This has been the
case since Monday. At the weekend, three things will happen:

- The cyclonic block over Iberia will fill and drift south.
- The upper anticyclone over southern Scandinavia will decline and withdraw
eastwards.
- In the Atlantic, a large upper low will move initially eastwards and will
then turn to the left to move northwards to the west of Ireland.

The net effect is that a southerly flow will develop across the UK,
bringing warm air northwards, and sweeping away the cold and damp
easterlies that have effected most of the country. Don't get the sun tan
lotion out, though, as the air will be fairly unstable and you can expect
to see rain or showers moving south to north at times.

Early next week the general Atlantic flow will veer more southwesterly and
strengthen. This will push fronts across the UK from the southwest. The
jet stream will be to the northwest out in the Atlantic so the fronts are
likely to be weak in the south and there should be plenty of dry and fairly
warm weather - albeit not wall-to-wall sunshine. During the second half of
the week there are signs of high pressure moving a bit closer to the
southern half of the UK, so things should settle down and temperatures
should remain above average.

Thanks Freddie that's really good info. Warmer but unstable is reasonably
good news for next week thanks - my allotment needs some TLC and get the
seed potatoes in between showers.