Observations beside the river

An original notice for an invented riverside weather station.

Electronic equipment at the station stores the temperature and air pressure automatically. Volunteers also complete a paper observation when the station opens and again before it closes.

For every handwritten observation, enter the time at which you looked across the river. You must also record the visibility by choosing one of these descriptions: ‘clear’, ‘reduced’ or ‘obscured’. Write in black ink so that the sheets can be scanned at the end of the month. Completed sheets should be placed in the blue folder inside the station.

Identify the two pieces of information that volunteers must record for every handwritten observation.