June July wet

[jamie]

Hi guys I have a favour to ask.

I'm having a hard time with Cliflo at the moment and cant seem to get the info I want. I want to know just how much rainfall above normal the south Auckland region (Clevdon, Waiuku, Pukekohe, Mercer) has had in June and July. I also want to know many rain days above normal there was.

Could someone that is savvy with this data base and has a spare few minutes, pull some info together regarding this.

I heard from a farmer with 30+ years of rainfall records say it was the wettest July in 30 years which surprised me. I know its been wet but not that wet. I thought its more just relentless wet days on saturated soils.

Thanks in advance

[Manukau heads obs]

that surprises me
as we have had July rainfall well over 200mm in times more recent than the last 30 years
(e.g 280mm for july 1998 here)

[jamie]

Yea I thought the same.

The comment came from a farmer in pukekawa/onewhero way

[Manukau heads obs]

I suspect that they did get more rain in that area, than north of the Waikato River, as a number of the westerly rain events were heavier between Raglan and Port Waikato
but still not like those other really wet July's

[Nev]

Probably the nearest of NIWA's few sites is Pukekohe to the north. It recorded 158mm in June (most of which fell in the last 9 days) and 184mm in July, which is about 112% and 122% of normal respectively and you only have to go back a few years to find higher.

However, there was quite a bit T-storm activity around Auckland/Waikato at the end of July. So maybe some of those Cb's produced some heavy, but very isolated falls around that Pukekawa/Onewhero area?

[NZstorm]

EW Mercer rainfall for the two months.

The region did have a drier start and then a wetter finish in both months.

In winter the region typically averages about 15 or 16 wet days (1.0mm+) per month.

[Nev]

Pukekohe had 14 'wet days' (more than 1mm) in June and 17 in July, which is probably close to normal.

[Manukau heads obs]

we had 17 and 20 wet days here respectively
I have recorded an August with 31 days of rain before (in the 80's)

[Nev]

we had 17 and 20 wet days here respectively
I have recorded an August with 31 days of rain before (in the 80's)

Presumably that's based on 'calendar-days'?

For calendar-days, NIWA's Pukekohe Ag-research site had 14 and 19 wet-days respectively.