WHATS YOUR WEATHER LIKE 2019

Mostly cloudy again, with the cloud cover being very smooth and a light grey. The breeze has vanished, and we've only had a short period of light rain (0.6mm) this morning. So right now the temperature is 63f with a pressure reading of 989hpa

 

Hi Jenny, since I know you live at sea level the following applies

Standard air pressure at standard elevation (sea level) at 15°C and 45° latitude is 1013 hPa or 29.92 inches of mercury. Most dial type barometers employ an airpressure sensor with a limited range of sensitivity.

So air pressure will differ between heights and temperature and so, because of the combination of height and temperature can differ, for that area, greatly, which is why the Met Offices past practice of just issuing sea level pressure for the whole of the National was inaccurate. I talk in "old talk" when it comes to measurement as I get a proper sense of what they mean. Fahrenheit is far more definitive than Centigrade which seems too "general".

But I don't think your barometer is talking in millibars for air pressure, but what you're reading is the temperature Fahrenheit. So my temperature reading is always in Fahrenheit which is 63.f and your of 76.5 is in Fahrenheit and we have a difference of 13.5f.

So Air Pressure conversion is easy. 1000 hPa are equal to 1000mbar, which is equal to 750 mm of mercury in a barometric column, which is 0.987 of the average atmospheric pressure, which on global average is 1013 millibars orhectopascals.

 

Good afternoon the wind has blown my weather station down,but its still a Bonus of a day

 

Hi Jenny, I have an old French Barometer given to me by my sister a long time ago......


and I had to go into the Kitchen to look at the dial as it is less referred to than it should be, and it was given to me in a poor state so that I could restore it.

Right, firstly, your Baromenter seems only to have one needle (whereas mine has two needles, (one to read air pressure and the other to read the temperature), although your Barometer face has scales for both air pressure and temperature which means, in all probability, the temperature needle has been removed at some stage of the Barometer's life and I believe the remaining needle is indicatiing the air pressure. So, obviously, the one needle is showing Variable.

 

Hold that thought, Jenny!!!. A little research shows me that the French from around the 18th Century says that they made Barometers of several types, one to show air pressure in millibars only, one to show air pressure in Mercury Inches, one only to show air pressure in milliibars and temperature, and one to show air pressure in Mercury inches and temperature.
So, I stand corrected, your Baromenter with the one finger is indicating the air pressure in Mercury inches and not millibars only while at the same time indication the general state of the weather.

Inches-Millibars Pressure Converter. To convert millibars to inches of mercury, multiply the millibar value by 0.0295301. Click anywhere out of the field for calculation

 

Agreed. pete. but mine also shows temperature as well as mercury inch and, as I said, the French made different types for different demands. I believe the National Museum and the Manchester Museum have all 4 types on display, the ones in Manchester belonged to the Duke of Wellington.