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This report summarises the meteorology and hydrology of
the 5 - 6 January 2005 storm event that affected the
western part of the Wellington region. The report gives an
overview of the weather patterns, quantifies rainfall and
river flows, and provides a frequency analysis of the event.
The hydrological data used is from Greater Wellington
Regional Council's environmental monitoring network,
supplemented with data from NIWA Slips and flooding
caused damage in some parts of the region during the
storm.

This report is a hydrological analysis and does not describe
the effect of flood protection measures, the damage that
occurred or the civil defence response.