General February Weather

[jamie]

Jan Feb total of 7.8mm here.

That’s 7.8mm in 70 days now.


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[Richard]

Medbury stats - rainfall total 22.8mm
Max temp, 31.8 17th
lowest max, 16deg 16th
min temp 2.9 9th
highest min 21.6 3rd

[Awhituobs]

but its still Feb guys lol

[NZ Thunderstorm Soc]

but its still Feb guys lol

...but today is an extra day for February, that occurs once every four years, so should today's rain be included in the usual February's rain fall?
Anyway, 11.3mm was recorded here from early this morning, and I see, that nothing was recorded at the RPA at Levels and bugger all rain fell in Ashburton? Interesting.

[snowstormwatcher]

Anyway, 11.3mm was recorded here from early this morning, and I see, that nothing was recorded at the RPA at Levels and bugger all rain fell in Ashburton? Interesting.

Yes looked like a good patch of rain near Geraldine on the rain radar this morning Ecan website showing 20mm at Woodbury. Nothing much here just 1mm in the gauge today from some brief drizzle this morning and 1.5mm yesterday from spillover rain.

[NZ Thunderstorm Soc]

CWU had no rain for Geraldine, but I don't trust their recordings anyway.

[tornado]

I had a bit of drizzle here from the weak front. 0.7mm. still looks like showers next week for upper north island. signs of Autumn slowly starting. break in high pressure,longer nights,cooler mornings etc

[NZ Thunderstorm Soc]

I had a bit of drizzle here from the weak front. 0.7mm. still looks like showers next week for upper north island. signs of Autumn slowly starting. break in high pressure,longer nights,cooler mornings etc

I see that the Chatham Islands had thunder forecasted for them over the past few days. Whether they got them, or not I don't know.
Seems an unlikely place for thunderstorm activity but have they had thunderstorms in the past?
...anyway here in Geraldine, we got some good rain early this morning, reducing to drizzle/light rain with a total of 11.3mm falling today until around just after noon when cloud started to break, but then cloud cover becoming persistent for the rest of the day.
Today's maximum was 17,7C.
NE winds this afternoon, moderate to fresh at times but becoming calm this evening.

[Nev]

I see that the Chatham Islands had thunder forecasted for them over the past few days. Whether they got them, or not I don't know.
Seems an unlikely place for thunderstorm activity but have they had thunderstorms in the past?

The Chatham Islands average more thunder-days per year than Christchurch…

THE CLIMATE AND WEATHER OF THE CHATHAM ISLANDS - NIWA

Thunderstorms

On average there are five days of thunder each year at the Chatham Islands, and 10 days of thunder in a year are likely once every 50 years. Although fairly evenly distributed throughout the year, there is a tendency for thunderstorms to occur more frequently from April to June and especially during the night. Meteorological situations associated with thunderstorms usually occur with cold unstable showery south-westerlies, or cold fronts crossing the islands. Due to the localised nature of thunderstorm occurrence, it is possible that not all thunderstorms are detected.

The heavy rain, lightning, hail, and wind squalls which can occur with thunderstorms will sometimes cause severe local flooding, disruption of electrical and electronic equipment, and damage vegetation and buildings.

Also of interest: https://historygeek.co.nz/2013/02/05/ea ... d-tornado/

[Awhituobs]

interesting photo!
I wonder what the exposure time had to be
(which is why it makes them look a bit odd)

[tornado]

Saw that article. it should say earliest known photograph of new zealand tornadoes cause there are actually 3.

overall this month i got 22.3 of rain with 17mm falling on the 22nd feb.

1 thunder day here : 22 feb. 2 rumbles heard when that front came through.


hottest temp here 29.6

[Cyclone Tracy]

Local feb stats

Mean daily temp = 21.7 (0.1c above the 2018/19 Ave)
Rainfall = 11m (58mm below 2001-2019 average)
Prevailing wind SW
0 thunder days.
Air pressure ave 1017.7 hPa. (4.4 hPa above ave)
Humidity 71.5% (5.1% below average)

Year to date

Mean daily temp 1.05c below 2018/19 Ave
Rainfall 20mm , 115mm below 2001-2019 average.

[spwill]

I notice Auckland Airport had only 1 day with rain recorded this Feb, a record perhaps? Grey Lynn showing 3 days with rain but two of the days showing only 0.2mm.

Re Chathams thunder, I wouldn't trust any of the numbers from Niwa regarding thunderstorm days.

[David]

Howick stats for Feb 2020

Mean temp = 21.1C

Mean daily high = 27.0C (smashing the old record of 26.1 for any month)
Highest temp = 29.9C (20th)
Lowest daily high = 23.7C (23rd)

Mean daily low = 16.2C
Lowest temp = 11.3C (10th)
Highest daily low = 20.2C (16th)

Total rainfall = 11.4 mm (all of that falling on one day of the month, the 22nd)
YTD rainfall = 19.8 mm

[Awhituobs]

my stats:
http://weather-display.com/windy/gb/cli ... 22020.html
average temperature was higher than Jan

[NZstorm]

Re Chathams thunder,

I think they would get cold pools passing through quite regularly in winter and spring with the 1 or 2 rumble type storms.

[Nev]

February 2020 was another very dry month for the top two-thirds of NZ, particularly in the North Island, with drought conditions declared in Northland and North Auckland on the 11th, followed by the Waikato and South Auckland on the 28th. Low rainfall records fell in places like Rotorua Aero (2.4mm) and Napier Aero (3.0mm). Record dry spells were also recorded in Auckland, along with places like Dargaville, Russell and Rotorua still not seeing any rain days over 1mm since about mid-Jan. In contrast, the lower South Island was very wet, with NIWA's Milford Sound EWS starting off with nearly 1100mm in just 3 days, including 566mm for the calendar day of the 3rd. A State of Emergency was declared in Southland and Fiordland after severe flooding and slips blocked roads and stranded tourists.

It was also a very warm month for most, starting off on the back of 'heatwaves' in the North Island's northern and eastern areas, the longest lasting 13 days at Whitianga and 12 days at Whangarei City. New all-time daily temp records were also set during the first few days of Feb at Napier Aero (37.4C), Whakatane Aero (36.4), Whangarei (34.1C), Whitianga (33.1C), Te Puke (33.0C), and Palmerston North (32.9C). Tauranga Aero also recorded its highest ever Feb mean T-max, Hamilton Aero its highest all-time mean T-max, Ruakura (Hamilton) its 3rd highest Feb mean T-max, Auckland Aero its 3rd equal highest mean T-max, Mangere (Auckland) its 4th equal highest mean T-max and Christchurch Aero its 4th highest Feb mean T-max.

Feb 2020 Climate Anomaly Maps ℅ NIWA.png

Some very preliminary Feb 2020 figures for the main centres:

Code: Select all

Feb 2020 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       25.7  +1.9    16.7  +0.5    21.2  +1.2     12   17%    269  137%
Auckland Aero           26.0  +1.9    16.8  +0.3    21.4  +1.1     14   20%
Tauranga Aero           26.5  +2.5    16.4  +0.9    21.5  +1.7     11   13%    n/a   n/a
Hamilton Aero           27.9  +3.2    12.0  -0.9    20.0  +1.2     18   24%
Hamilton, Ruakura       27.6  +3.3    12.5  -0.8    20.1  +1.3     10   14%    244  127%
Wellington, Kelburn     21.2  +0.6    14.7  +1.0    18.0  +0.8     42   59%    203   96%
Christchurch Aero       24.4  +2.5    11.9  +0.3    18.1  +1.3     23   53%    165   85%
Dunedin, Musselburgh    19.4  +0.9    12.0  +0.5    15.7  +0.7    110  162%    185  118%
Greymouth Aero          20.6  +0.5    12.6   0.0    16.6  +0.2    153   95%    177   99%

Edit: Updated Chch figures

[NZ Thunderstorm Soc]

Raukapuka Stats- Geraldine

min- 1.5C
Max - 36C
total rainfall - 81.6mm over 13 days
Lowest max - 16.1C
Highest min - 17.4C
Days over 30C - 5