One year of rain in 8 months
Taupo has surpassed its average expected annual rainfall already.
It’s only September, but more rain has fallen in Taupo so far than what could normally be expected in a whole year.
Metservice scientists say it may get rainier too, with global warming increasing the amount of moisture in the air.
Claire Flynn, Metservice meteorologist, said 992mm of rainfall had been recorded at Taupo Airport by Friday morning - passing the 41-year average of 954.6 mm per year.
While Turangi was typically rainier than Taupo, rainfall hadn’t reached its annual average yet.
‘‘Being closer to the mountains, it is a lot wetter there, with an average annual rainfall of 1556mm, Flynn said.
‘‘So far this year up to midnight [Thursday], Turangi have had 1300mm of rainfall,’’ she said.
The Taupo District hasn’t been as wet as Rotorua though, which has had 156 per cent of its average annual rainfall already.
In Rotorua, 2046mm of rain has fallen. The annual average for that city is only 1313mm.
Flynn said New Zealand had been affected by a lot of lowpressure systems coming from the Tasman Sea this year.
‘‘Usually we see a lot of fastmoving fronts coming from the southwest.
‘‘This year, we have had fewer of these fast moving fronts, and instead had more low-pressure systems – some of which have sat stationary, close to New Zealand for a period of time, bringing periods of persistent rain to many parts of the country,’’ she said.
Severe weather forecaster Erick Brenstrum said warmer air could hold more moisture, so the future wasn’t likely to be drier.
‘‘Due to warming around the globe, generally rainfall events across the world will bring larger amounts of rainfall than a similar storm would have brought in previous decades,’’ he said.
Additionally, when moisture condenses from vapour into liquid [rain], it releases latent heat energy, the Metservice forecaster said.
‘‘This extra energy can also serve to make storms more intense, and therefore increase rainfall that way.’’
Average rainfall around New Zealand [10-year]: ❚ Auckland average annual: 1065mm. Year to date: 985 mm. ❚ Rotorua average annual: 1313 mm. YTD: 2046 mm. ❚ Hamilton average annual: 1129 mm. YTD: 1110 mm. ❚ Wellington average annual: 1230 mm. YTD: 1135 mm ❚ Fiordland average annual rainfall: 4925 mm. YTD: 4006 mm.
‘‘Due to warming around the globe... [storms] will bring larger amounts of rainfall.’’
Wet weather isn’t bothering Peyton and Dominick, who enjoy splashing in puddles.