Air pressure... talk to me!

[GingerWizard]

I have just acquired two barometers. They are reading a bit different presently, and i would like to try and adjust them. One is quite old (circa 1900) the other more modern, (1970's). What do i need to know about setting them? I am sure it will take a good few days to get varying pressures and therefore accuracy. However is there a particular time i should adjust them. Say for instance at a high or low peak/trough......


I know someone out there is brimming with knowledge about this topic so please spill forth......

Thank You!

Gwiz

[Zad]

It seems to be 1008mb over Kent at the moment:
http://www.metoffice.gov.uk/weather/uk/uk_latest_p...

(Obviously that will change depending on when you read this)

[HiRich]

1) Find a local, live reference (as Zad did)
2) Choose a day/time when there is likely to be little variation between the reference and home. (look at the isobar maps, and a good rule would be "when there's no wind")
3) Depending on type, there might be some thermal variation (one reason they are normally inside, in the shade), so make sure they are in or near their normal location and not being sun-scorched.
4) Adjust.

[fangio]

Don't forget to allow for the height above sea level of your location.

[GingerWizard]

Thankyou all, i will begin adjusting them. My home over looks the english channel so i know the height above sea level! What has been mentioned is what i had initially thought.

Cheers

Gwiz


(how the hell this got moved to homes and gardens i do not know!)

[anonymous-user]

yep approx 1mb every 30ft

[rovermorris999]

This is a good site:
www.xcweather.co.uk