August 2019 was characterised by considerably lower than normal mean sea level pressure over and to the south of New Zealand.
New Zealand Climate Update 243 - September 2019
19 September 2019
What happened in August how our climate outlook for the previous three months turned out, global and local sea temperatures, and our outlook for September-November.
The NINO3.4 Index anomaly (in the central Pacific) for the month of August (to the 25th) was +0.20˚C, suggesting that oceanic ENSO neutral conditions have arrived.
September – November 2019 temperatures have about equal chances of being near average (45% chance) or below average (40% chance) for the north and west of the South Island
June – August 2019 pressure was forecast to be higher than normal to the west and northwest of New Zealand and below normal to the south of the country.