New Zealand climate in April
April was a relatively dry month overall, especially over the North Island and the north and west of the South Island, with less than 50% of normal rainfall in many areas. The month was dominated by anticyclones to the west and winds from the southerly sector, which produced cooler than normal conditions for many.
For more information on the climate in April 2007, visit the climate summaries page at www.niwascience.co.nz/ncc/cs/mclimsum_07_04
End of month rainfall lifted soil moisture levels
Rainfall late in April brought some relief to dry soils in many areas, although soil moisture deficits of about 110 mm persisted in Hawke’s Bay, central Marlborough and Central Otago.
Mostly below normal catchment yields
April streamflows were normal in the far north, and generally below normal elsewhere.
February to April: the climate we predicted and what happened
Rainfall was normal or below normal as predicted in the east and north of the North Island, apart from wetter than expected conditions in Northland. Elsewhere conditions were mostly drier than expected.
Air temperatures were higher than predicted in the south and west of the South Island, but near normal as expected elsewhere.
Streamflows were above normal in the far north and mostly below normal elsewhere. Catchment yields were generally lower than predicted in the South Island, and southwest North Island.