Autumnal Weekend.

After a cool night, when the average temperature reached around 3.5c, the Autumn season seems to have taken its place in a stereotypical fashion.

The jet stream is still running, in the main, towards the south and this action is dragging cool air down from north.  Today will, therefore, start off with a similar northerly wind direction although we will see a wind shift as the day passes towards the E.  Winds, however, will remain light with an average speed of around 4mph.

The movement of the jet stream (see image below) is creating low pressure systems out to the south-west of us.  These systems will travel towards the UK as the day passes and will bring wind and rain to our area sometime during tomorrow PM.  I can give more precise details in Sunday’s bulletin although forecast models would suggest the rain will reach our area by mid afternoon.

Today, however, we will some clear / bright spells and the day will remain mostly dry.   Clouds will be generally thin or heavily fragmented for much of the day. As early evening reaches us we will see an increase in cloud cover.  This cover will continue overnight.

Despite the clear daytime spells our top temperature will be lower than you would expect with a high of around 13c by mid afternoon.  Overnight the minimum temperature will reach 5c.

Today’s summary.

Generally bright but still on the cool side.

Observations made 06:20 hours Hammerwich, Staffordshire.

Air pressure : 1019.7; Temperature : 4.7c; Wind : 2mph NNW; Relative humidity : 93%; Rain last 24 hours : 7mm.

Jet Stream Image  Showing Low Pressure System Developing In The SW (Note the “loop” and the circle of low pressure).


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