USUALLY WHEN weather forecasters say, 'It will be cloudy today', we only have a basic idea of what the conditions will be like.
But more than 2,100 students from 300 secondary schools will know exactly what that means after taking part in a project which will help them understand the weather forecasting system.
'Weather Diary 2005' is jointly organised by the Hong Kong Observatory (HKO) and Hong Kong Education City.
They will jot down their observations as sunny, cloudy or overcast, and if there's a drizzle, shower or heavy rain.
It might sound like a simple task, but a senior scientific officer from the HKO said that the students had to learn some skills.
The HKO conducted a series of talks for the participants last month to give them a better understanding of the principles involved.