Hemel Hempstead, Old Fishery Lane water level

What this means

The River Bulbourne at Hemel Hempstead, Old Fishery Lane is running far below normal at 0.62 m.

The median for late October is 0.72 m, based on 21 years of readings, so the river level is 0.09 m below typical. On the same day last year the reading was 0.71 m, a difference of −0.08 m. The lowest reading on record is 0.54 m (May 11, 2006).

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 0.59 m and 0.73 m.

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

Compared with 21 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date

0.72 m0.09 m below the median for this date

Normal for this date

0.64 m – 0.78 m8 years in 10 fall in this range (21 years of records)

Normal range

0.64 m – 1.99 m

Same day last year

0.71 m−0.08 m

Lowest and highest in 30 days

0.59 m – 0.73 m

Lowest and highest in 12 months

0.60 m – 0.96 m

Highest on record

1.80 mSeptember 22, 1992

Lowest on record

0.54 mMay 11, 2006