Lewis, E. et al

Gridded estimates of hourly areal rainfall for Great Britain (1990-2014) [CEH-GEAR1hr]

The dataset contains 1km gridded estimates of hourly rainfall for Great-Britain for the period 1990-2014. The estimates are derived by applying the nearest neighbour interpolation method to a national database of hourly raingauge observations collated by Newcastle University and the Centre for Ecology & Hydrology (CEH). These interpolated hourly estimates were then used to temporally disaggregate the CEH-GEAR daily rainfall dataset. The estimated rainfall on a given hour refers to the rainfall amount accumulated in the previous hour.

The dataset also contains data indicating the distance between the grid point and the closest recording raingauge used in its interpolation. When this distance is greater than 50km, or there is zero rainfall recorded in the closest gauge, the daily value is disaggregated using a design storm. The dataset therefore also contains a flag indicating if the design storm was used. These data are provided as an indicator of the quality of the estimates.

Publication date: 2019-04-18

Get the data

This dataset is available under the terms of the Open Government Licence

Format of the data: NetCDF

You must cite: Lewis, E.; Quinn, N.; Blenkinsop, S.; Fowler, H.J.; Freer, J.; Tanguy, M.; Hitt, O.; Coxon, G.; Bates, P.; Woods, R. (2019). Gridded estimates of hourly areal rainfall for Great Britain (1990-2014) [CEH-GEAR1hr]. NERC Environmental Information Data Centre. https://doi.org/10.5285/d4ddc781-25f3-423a-bba0-747cc82dc6fa


© Natural Environment Research Council


Study area
Temporal extent
1990-01-01    to    2014-12-31

Provenance & quality

The hourly rainfall estimates are derived from the temporal disaggregation of the CEH-GEAR daily data using hourly gauge data. This methodology ensures that the daily totals of the CEH_GEAR daily and 1hr datasets are consistent. The hourly gauge data is from the Met Office, the England Environment Agency (EA), Natural Resources Wales (NRW) and the Scottish Environmental Protection Agency (SEPA). The CEH-GEAR daily data is derived from the Met Office national database of observed precipitation. The nearest neighbour interpolation methodology was used to generate the gridded hourly estimates which were subsequently used to disaggregate the daily data.

A quality control protocol was established in order to identify and reject erroneous hourly values in the gauge rainfall input dataset. The quality control procedure is a three step process:
1) The gauge data is compared to the gridded CEH-GEAR daily dataset to identify suspect gauges
2) A series of quality control tests are applied to identify suspect values at all gauges which are marked with a quality control flag
3) Combinations of quality control flags for a given hourly accumulation are used to determine which flagged data are treated as erroneous values and thus excluded from the gauge records.

Supplemental information

This dataset is a supplement to:

Lewis, E., Quinn, N., Blenkinsop, S., Fowler, H. J., Freer, J., Tanguy, M., … Woods, R. (2018). A rule based quality control method for hourly rainfall data and a 1 km resolution gridded hourly rainfall dataset for Great Britain: CEH-GEAR1hr. Journal of Hydrology, 564, 930–943

Correspondence/contact details

Dr Elizabeth Lewis
Newcastle University
School of Engineering, Cassie Building
Newcastle upon Tyne


Lewis, E.
Newcastle University
Quinn, N.
University of Bristol
Blenkinsop, S.
Newcastle University
Fowler, H.J.
Newcastle University
Freer, J.
University of Bristol
Tanguy, M.
Centre for Ecology & Hydrology
Hitt, O.
Centre for Ecology & Hydrology
Coxon, G.
University of Bristol
Bates, P.
University of Bristol
Woods, R.
University of Bristol

Other contacts

NERC EDS Environmental Information Data Centre
NERC Environmental Information Data Centre

Additional metadata

Topic categories
Environment , Climatology / Meteorology / Atmosphere
CEH-GEAR,  Climate and climate change Gridded estimates of areal rainfall (GEAR)
Meteorological geographical features
Spatial representation type
Spatial reference system
OSGB 1936 / British National Grid
Last updated
25 June 2021 18:35