General January Weather

Weather reports, prognostics, questions and discussion. Climate diagnostics, drivers, and outlooks. Weather stations and websites.
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Richard
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Re: General January Weather

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Richard wrote: Mon 30/01/2023 20:05 Unfortunately the weather station stopped working properly at 6.00pm where 51mm had fallen in 40mins, that intense rain kept up till around 7.00 and was falling at around that same rate. When it was recording the rain was falling at 96mm per hour, the hour missing from the recording would have been around the same so we could have had around 150mm in the hour and a half

Screenshot 2023-01-30 at 19-46-14 Neon System.png

Worked out that it shows in non daylight savings time, that's what buggered me up, had always thought the website had an hour lag.
So 58mm from yesterdays storm
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Re: N.I. Heavy Rainfall Event - Jan 27-Feb 02

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Fine overnight but clouding up this morning and afternoon with light NE. a bit hazy.
Cloud layers this afternoon gradually thickening this evening. 23.4C for today, not very interesting. .
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Nev
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Re: General January Weather

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Here's some January 2023 rainfall records to 9am this morning from MS. Note that it doesn't include Kaikohe's 527mm. Auckland Aero's 420mm was also its wettest all time month - previous record being 304mm set in July 1998.

MetService Jan 2023 rainfall records.jpg
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cbm
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Re: General January Weather

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After trying to rally a bit mid month, imagine some locations sunshine hours are going to threaten low records also.

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Richard
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Re: General January Weather

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lake sumner.resized.jpg
Be interesting to know how much rain fell in the Hurunui Gorge during Mondays storm, this stream is only about a km long so not a huge catchment
https://www.hurunui.govt.nz/council/ale ... 7q9s2dgu53
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Re: General January Weather

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January 2023 was a month of contrasts, being extremely wet and cloudy in the North Island, while mostly dry and sunny in the South Island.

Jan 2023 Climate Anomaly Maps ℅ NIWA.png

Preliminary stats for the main centres:

Code: Select all

Jan 2023 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       23.3  -0.1    16.9  +1.0    20.1  +0.5    478  780%    145   62%
Tauranga Aero           23.1  -0.8    17.1  +2.0    20.1  +0.6    385  491%    
Hamilton Aero *         23.5  -0.8    15.5  +3.1    19.5  +1.2    235  286%    156   68%
Wellington, Kelburn     21.0  +0.7    14.3  +0.8    17.6  +0.7    116  154%    229   93%
Christchurch Aero       22.4  -0.3    12.9  +1.0    17.6  +0.4     26   72%    244  102%
Dunedin, Musselburgh    20.1  +1.2    13.6  +2.0    16.8  +1.5     24   33%    271  150%
Greymouth Aero          24.4  +4.6    15.2  +2.8    19.8  +3.7    143   68%    272  135% 

* Sunshine from Ruakura 
Edit: Above table's departures are based on 1981-2010 averages. However, as of this year NIWA are now using 1991-2020 averages.

Mangere, Auckland recorded its wettest all time month (records from 1959) and both Tauranga and Hamilton Aero's wettest ever January (records from 1910 and 1935 respectively). Greymouth Aero also equaled its warmest all time month (records from 1947).
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spwill
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Re: General January Weather

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The last 10 Januarys at Mangere for comparison :smile:
Rainfall, 6mm,42mm,6mm,117mm,36mm,121mm,48mm,8mm,54mm,5mm, this January 478mm

Sunshine , 255hrs,242hrs,308hrs,206hrs,242hrs,212hrs,287hrs,278hrs,280hrs,312hrs, this January 145hrs

For what its worth 5 of the last 10 years have been La Nina, 2 have been El Nino.
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Re: General January Weather

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From an article a few weeks back "The fewest sunshine hours that had ever occurred in the month of January was in 1989, with 168 hours of bright sunshine recorded"

So seems this month in Auckland has smashed two records in a undesired way.

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Re: General January Weather

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cbm wrote: Thu 02/02/2023 11:46 From an article a few weeks back "The fewest sunshine hours that had ever occurred in the month of January was in 1989, with 168 hours of bright sunshine recorded"

So seems this month in Auckland has smashed two records in a undesired way.
Correct. This Jan was also Ruakura, Hamilton's cloudiest (by 3.5 hrs) - previous record of 159 hrs was also in 1989, from records since 1937.
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David
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Re: General January Weather

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Howick summary - Jan 2023

Mean temp: 20.0C
Mean daily high: 23.8C
Mean daily low: 16.8C
Highest temperature: 27.2C (on day 19)
Lowest temperature: 13.0C (on day 18)
Total rainfall: 274mm

Notes:
- wettest Jan on record, beating out Jan 2011 by 20mm
- 2nd wettest month on record, behind Mar 2017 which had 324mm
- the mean daily max was the lowest for any Jan since 2014
Image
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Re: General January Weather

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Readings from Raukapuka/Geraldine for January

Rainfall 75.9mm over 12 days
Max temp 28.4deg (Friday the 27th)
Min temp 7.7 deg,(Monday the 9th)
Lowest max temp 13.4deg, (Monday the 23rd)
Highest min 17.3C (Monday the 30th)
Thunder heard only on one day January the 6th.
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