Penzance Alverton water level

What this means

At 0.07 m, the Lariggan River at Penzance Alverton is far below normal for mid-October.

The median for mid-October is 0.10 m, based on 16 years of readings, so the river level is 0.03 m below typical. On the same day last year the reading was 0.10 m, a difference of −0.03 m. The lowest reading on record is 0.04 m (September 8, 2011).

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 0.06 m and 0.11 m.

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

Compared with 16 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date

0.10 m0.03 m below the median for this date

Normal for this date

0.07 m – 0.15 m8 years in 10 fall in this range (16 years of records)

Normal range

0.05 m – 0.30 m

Same day last year

0.10 m−0.03 m

Lowest and highest in 30 days

0.06 m – 0.11 m

Lowest and highest in 12 months

0.06 m – 0.31 m

Highest on record

0.68 mMarch 21, 2013

Lowest on record

0.04 mSeptember 8, 2011