Liverpool tide gauge site

The tide gauge is located within the Old Lock Keeper's Office at the entrance to Gladstone Dock. The pressure points are located on the seaward side of Gladstone Lock.
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Tide gauge building

The tide gauge consists of a pneumatic bubbler system supplying two full tide pressure points. These are mounted on steelwork attached to an access ladder on the seaward side of the dock entrance. Both pressure lines, wind speed and direction are monitored by the POL data logger.

Tide gauge location The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.

External users

Sea level pressures and/or elevations from this site are supplied to the following authority:

  • Environment Agency, North West Region

Site history

1991 – DATARING system installed with two full tide pressure points and datum probe
1995 – Wind speed and direction instruments installed
2000 – POL data logger installed
2001 – Mid-Tide pressure point installed
2003 – Wind speed & direction instrument failed

Location
Latitude53° 26.981'N
Longitude3° 1.086'W
Grid refSJ 3248 9525
Earliest data1991
Tidal levels 2008 to 2026
HAT10.37 m
LAT0.02 m
MHWS9.39 m
MHWN7.45 m
MLWN3.16 m
MLWS1.12 m
H for 2017 10.01 m
L for 2017 0.42 m
H for 2018 10.06 m
L for 2018 0.25 m
MSR8.27 m
MNR4.29 m

Abbreviations
HAT – highest astronomical tide
LAT – lowest astronomical tide
MHWS – mean high water springs
MHWN – mean high water neaps
MLWN – mean low water neaps
MLWS – mean low water springs
H – highest for year
L – lowest for year
MSR – mean spring range
MNR – mean neap range

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