Annamometer / weather station

Spinning cups in the wind

Gale force blowing across the land

Pressure dropping

Rain falling horizontal

Waves whipped into crazy foam

Crashing over coastal roads

Trees bending over fences

Birds cowering in hedges

Cold is the storm

Ready to snow?

Gales are unfriendly

Viscious and fearful

Great, gusting blow…..

Barometer reading

My barometer pressures have dropped from about 1010 yesterday to 970 on my traditional barometer and 959 on my electric weather station. There is always a discrepancy of about 10 (millimeters of Mercury?) between the two.

What is ‘pressure’. Pressure is air pressure, the weight of the air pressing down on us from the top of the atmosphere downwards.

The guage on the traditional barometer has gone from fair (gold pointer) to rain with the black pointer.

How is pressure measured? One ‘bar’ of pressure is the average air pressure at sea level. It’s also measured in millimetres of Mercury.  There was a historical experiment to find out about the air pressure. The experimenters put a tube of  mercury upside down in a glass dish. This can leave a vacuum in the top of the tube. If you have the tube and dish at sea level the Mercury will be at a lowed level in the dish. This is because a larger weight of atmosphere is pressing down. Go up a mountain and the level in the dish will rise, because the air pressure up there is lower (less depth of atmosphere).

There is lots of information on sites like Wikipedia about air pressure. They probably describe how the air circulating in the atmosphere causes areas of low and high pressure. The weather is also influenced by the sea and its temperatures and the heating of the Earth’s surface by the sun.

Looks like rain….. again!

sketch-1560966518858

Rain, some people never get any, others get monsoons. Here in temperate Britain we get our fair share but the South East gets less. Up here in the Midlands we usually have reasonable amounts and we rarely have hose pipe bans.

This year we had a really mild February followed by a wet and windy spell. Now in June the temperature is lower than usual and we are stuck under a low pressure area, so it keeps raining. Don’t expect to get enough vitamin D either. It’s overcast and grey.

Apparently the Jet Stream in the upper atmosphere if swinging backwards and forwards, sending Low pressure areas down riwards us or up from the bay if biscay. High pressure and a stable weather situation seem far away.

The weather in the east has been very bad for a change and there are floods in Lincolnshire. Rivers have burst their banks, and as a lot of the land is below sea level, the embankments and river edges are overflowing. Homes have been flooded. Life is interesting.