We are often asked why our levels differ from other readings or markers, and there can be many reasons for this:
What are 'Normal summer lows'? We use Q95 values mostly given to us by the providers of our river data, or ascertained ourselves after a lengthy dry spell. These are the value that the river is above for 95% of the time in the summer. They are not absolute lows, so in exceptionally dry periods, you will still see the odd negative reading.