Re: General May Weather
Posted: Sat 01/06/2019 00:20
is it odd having thunderstorm in auckland last day of autum?Cyclone Tracy wrote: ↑Sat 01/06/2019 09:39 May 2019 stats –
Mean daily temp = 15.4c, 1.4c above normal
Rainfall = 46.0mm (80mm below local average)
Prevailing wind SW
1 thunder day. 31 May
YTD daily mean temp = 19.08c (Around 1.5c above normal)
YTD rainfall = 199.8mm (458mm normal accum to end of May)
Driest start to the year ever recorded (Local records since 2001)
MetService May 2019 Summary - An unusually dry month
Highs featured on the weather maps over New Zealand in May, keeping the rain makers away. It was an unusually dry May in the north and east of both Islands, even with the rain right at the end of the month. Many northern and eastern areas of the North Island recorded less than half of normal May rainfall. Abnormally low soil moisture continued across the North Island, especially north of Taupo. This reflects five months of higher than normal pressure over New Zealand, and five relatively dry months in a row.
Whangarei, Pukekohe, Hamilton, Taupo and Napier have all recorded less than 220mm of rain so far in 2019, based on data until the 30th. This is less than 40% of what is normal for Whangarei and about 50% of normal in the other areas.
May started out very cold across the North Island, but temperatures quickly rebounded to run extremely warm across the country for the remainder of the month.
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May 2019 Average Temps, Rainfall, Sunshine and departures from 1981-2010 normals ℅ NIWA
Site T-max °C T-min °C T-mean °C Rain mm Sun hrs
Auckland, Mangere 19.1 +1.6 10.9 +0.5 15.0 +1.0 56 52% 156 109%
Auckland Aero 18.8 +1.4 11.2 +0.6 15.0 +1.0 63 58%
Tauranga Aero 18.7 +1.4 9.7 +0.4 14.2 +0.9 47 43% n/a n/a
Hamilton Aero 17.8 +1.0 6.9 +0.5 12.4 +0.8 62 58%
Hamilton, Ruakura 18.1 +1.2 7.8 +0.9 13.0 +1.1 61 63% 129 90%
Wellington, Kelburn 16.3 +2.0 11.2 +2.2 13.7 +2.0 82 74% 169 127%
Christchurch Aero 16.4 +2.1 4.1 +0.4 10.3 +1.3 73 127% 148 106%
Dunedin, Musselburgh 15.6 +2.9 8.0 +2.1 11.8 +2.5 62 95% 109 100%
Nev wrote: ↑Sun 02/06/2019 08:25
May 2019 Climate Anomaly Maps ℅ NIWA.gif
Some preliminary May 2019 figures for the main centres:
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May 2019 Average Temps, Rainfall, Sunshine and departures from 1981-2010 normals ℅ NIWA Site T-max °C T-min °C T-mean °C Rain mm Sun hrs Auckland, Mangere 19.1 +1.6 10.9 +0.5 15.0 +1.0 56 52% 156 109% Auckland Aero 18.9 +1.5 11.2 +0.6 15.0 +1.0 47 43% Tauranga Aero 18.8 +1.5 9.7 +0.4 14.3 +1.0 36 32% n/a n/a Hamilton Aero 17.9 +1.1 6.9 +0.5 12.4 +0.8 55 52% Hamilton, Ruakura 18.1 +1.2 7.8 +0.9 13.0 +1.1 61 63% 129 90% Wellington, Kelburn 16.3 +2.0 11.2 +2.2 13.8 +2.1 89 80% 169 127% Christchurch Aero 16.4 +2.1 4.1 +0.4 10.3 +1.3 59 103% 143* 106% Dunedin, Musselburgh 15.6 +2.9 8.0 +2.1 11.8 +2.5 62 95% 109 100% (* missing 1 day's sunshine data)
Kelburn's T-mean adjusted to 13.7C, so 2nd-equal May highest (with 2011) after 13.8C in 2016. Its T-min of 11.2C was also 2nd highest after 11.4C in 2016. However, its T-max of 16.3C this May was a record.
A close thing though for Kelburn's Tmean - averaging the daily numbers gives a value just a whisker below 13.75C, while 2016's value is about 13.76C.Nev wrote: ↑Mon 03/06/2019 08:42Kelburn's T-mean adjusted to 13.7C, so 2nd-equal May highest (with 2011) after 13.8C in 2016. Its T-min of 11.2C was also 2nd highest after 11.4C in 2016. However, its T-max of 16.3C this May was a record.
Similarly, Musselburgh's T-mean of 11.8C was its 2nd May highest after 11.9C in 1999. Its T-max of 15.6C was also 2nd-equal highest (with 2007) after 16.3C in 1999. However, its T-min of 0.8C this May was a record.