This site provides useful practical information related to global and national weather observing practices and instruments, including independent equipment reviews.
You will find much of the background in my book The Weather Observer’s Handbook (published by Cambridge University Press), details of which can also be found on this site, together with useful links and downloads.
Author, The Weather Observer’s Handbook
A nation obsessed with the weather? Yes, certainly, but which nation?
Tip of The Day
AWS software provides three key functions – system setup and configuration, communication with and downloading of data from the datalogger, and the display of current and logged data. Most offer some form of data upload to Internet/website.
Where accurate air pressure records are required, the observed barometer reading needs to be adjusted to a standard level, usually mean sea level (MSL), because air pressure decreases rapidly with altitude. A variety of approaches exist to correct or ‘set’ a barometer to mean sea level: four are described in The Weather Observer's Handbook The choice of method depends upon accuracy sought (and the accuracy of the sensor) and height above sea level. Downloadable Excel spreadsheets are available on this site to simplify the production of site-specific sea level correction tables where desired.
It is advisable to check and test all sensor / datalogger / software and communications thoroughly, over a period of at least a few days, before permanent hardware installation or embarking on any long-term data collection.
By convention, weather measurements throughout the world are made to a common time standard – Coordinated Universal Time (UTC). For all practical purposes, UTC is identical to Greenwich Mean Time (GMT).
Most manual raingauges are read once daily, usually at a standard morning observation time, typically between 7 A.M. and 9 A.M. local time. The morning reading should be ‘thrown back’ to the previous day’s date.