Whetstone water level

What this means

Dollis Brook at Whetstone is running at a record low at 0.01 m.

No reading on record has been lower: the old record low was 0.25 m, from July 23, 2008. The median for mid-October is 0.29 m, based on 20 years of readings, so the river level is 0.27 m below typical. On the same day last year the reading was 0.26 m, a difference of −0.25 m.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. In the last month it has stayed between 0.00 m and 0.14 m.

Autumn rain usually starts to lift rivers again after the summer low.

Compared with the highest and lowest levels the agency has recorded at this gauge. How to read levels

Key numbers

Median for this date

0.29 m0.27 m below the median for this date

Normal for this date

0.27 m – 0.35 m8 years in 10 fall in this range (20 years of records)

Normal range

0.26 m – 2.00 m

Same day last year

0.26 m−0.25 m

Lowest and highest in 30 days

0.00 m – 0.14 m

Lowest and highest in 12 months

0.01 m – 0.55 m

Highest on record

1.07 mFebruary 10, 2009

Lowest on record

0.25 mJuly 23, 2008

Lowest on record

0.24 m below the lowest level on record