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 new book The Weather Observer’s Handbook (Cambridge University Press, 2012), details of which can also be found on this site, together with useful links and downloads.

Stephen Burt
Author, The Weather Observer’s Handbook

A nation obsessed with the weather? Yes, certainly, but which nation?


Tip of The Day
Earth temperatures are most frequently measured at depths of 5, 10, 20, 30, 50 and 100 cm below ground level. Measurements at 30 cm or deeper are normally made under a grass surface, while the shallower depths are measured under a bare soil plot. Both should remain fully exposed to sunshine, wind and rainfall.
By convention, 24 hour minimum temperatures read at the morning observation are entered to the day on which they were read, whereas 24 hour maximum temperature and total rainfall are entered to the day prior to the observation (they are said to be ‘thrown back’).
Pressure sensors must be located away from places that may experience sudden changes in temperature (direct sunshine, heating appliances or air conditioning outlets) or draughts, which will cause erroneous readings.
The choice of datalogger and automatic weather station (AWS) software is crucial to the effective operation of any AWS. Its specification will define the capabilities (or limitations) of the AWS, and the choice of unit should be given at least as much consideration as the choice of sensors.
There are enormous differences in functionality and capability between basic and advanced models of automatic weather station (AWS). The general rule that ‘you get what you pay for’ holds true for AWSs as well as most other products, but some systems are better than others and it pays to check available products carefully against your requirements to ensure the best fit.