Unstable Weather
Forum rules
These topics are a read-only archive and may be subject to out-of-date information.
For today's weather discussion head to: New Zealand Weather & Climate
These topics are a read-only archive and may be subject to out-of-date information.
For today's weather discussion head to: New Zealand Weather & Climate
- NZstorm
- Posts: 11333
- Joined: Mon 10/03/2003 19:38
- Location: Grey Lynn, Auckland
- Has thanked: 342 times
- Been thanked: 361 times
Unstable Weather
I thought i would start off a new thread.
A very sunny day today and only Isolated cb's developing. I'm not sure why so few developed as the upper air was tending unstable with daytime heating. I suspect the air got a bit dry. Convective clouds hate low dewpoints. But I don't blame Met Service going for the showers.
I was working in the MT Eden area today and photographed this convective buildup around 1pm. I'm sure this cloud would have had hail.
Wide angle lenses here.
Towering cumulus
Glaciates forming Cumulonimbus
Cb shows further development.
I went up onto top of MT Eden to get this shot of the same convective system. The shower is about 15km distant and I had to use a wide angle lense to get the whole cloud in.
A very sunny day today and only Isolated cb's developing. I'm not sure why so few developed as the upper air was tending unstable with daytime heating. I suspect the air got a bit dry. Convective clouds hate low dewpoints. But I don't blame Met Service going for the showers.
I was working in the MT Eden area today and photographed this convective buildup around 1pm. I'm sure this cloud would have had hail.
Wide angle lenses here.
Towering cumulus
Glaciates forming Cumulonimbus
Cb shows further development.
I went up onto top of MT Eden to get this shot of the same convective system. The shower is about 15km distant and I had to use a wide angle lense to get the whole cloud in.
-
- Posts: 2068
- Joined: Wed 12/03/2003 19:47
- Location: Mt Somers
- Has thanked: 19 times
- Been thanked: 41 times
Hold on Dean! I've got a photo of a big Cb that floated past the NW of Chch about a week ago, it produced hail in Oxford and there was lightning as me and John got sferics on the radio (unfortunately not much lightning though). But I guess this didn't float past Ashburton so in your case, yes they are rare in your skies, what am I saying! they are rare in our skies to, if you compare how much Auckland gets as to what we get here in Chch I would say it's rare for us to compared to Auckland. Anyway, moving on!
Great photos Steven. Do you have an idea on the heights this cloud got to?
Cheers
Aaron Wilkinson
Great photos Steven. Do you have an idea on the heights this cloud got to?
Cheers
Aaron Wilkinson
-
- Posts: 18567
- Joined: Wed 12/03/2003 22:08
- Location: Raukapuka Geraldine
- Has thanked: 1789 times
- Been thanked: 1430 times
Good photos Steven.
Those type of Cu congestus clouds I call - "Fists" as they look like a clenched fist sticking up into the clear blue sky.
Unstable and interesting sky here today. Fine now.
Despite the strong SE airflow over the SI at the moment, there was a light northerly blowing here this afternoon which resulted with a substantial convective shower here around 1:30pm. I got 2.5mm from it.
The moon here looked quite good this evening, with a halo from the cirrus up there plus Mars shining away. Would of made a good photo if I had a suitable camera!
JohnGaul
NZTS
Those type of Cu congestus clouds I call - "Fists" as they look like a clenched fist sticking up into the clear blue sky.
Unstable and interesting sky here today. Fine now.
Despite the strong SE airflow over the SI at the moment, there was a light northerly blowing here this afternoon which resulted with a substantial convective shower here around 1:30pm. I got 2.5mm from it.
The moon here looked quite good this evening, with a halo from the cirrus up there plus Mars shining away. Would of made a good photo if I had a suitable camera!
JohnGaul
NZTS
-
- Posts: 2068
- Joined: Wed 12/03/2003 19:47
- Location: Mt Somers
- Has thanked: 19 times
- Been thanked: 41 times
Thanks for the info on height Steven.
Unstable sky John? Do you say this because of the shower you mention and the northerly breeze or do you say it because of the cloud stucture? I never got this shower you mention, it must of been localised.
Cheers
Aaron Wilkinson (Cheers is becoming repetative, must come up with better line <G>)
Unstable sky John? Do you say this because of the shower you mention and the northerly breeze or do you say it because of the cloud stucture? I never got this shower you mention, it must of been localised.
Cheers
Aaron Wilkinson (Cheers is becoming repetative, must come up with better line <G>)
-
- Posts: 12305
- Joined: Mon 10/03/2003 16:30
- Location: West Coast Road, Manukau Peninsula, North Island
- Has thanked: 0
- Been thanked: 0
- Contact:
-
- Posts: 12305
- Joined: Mon 10/03/2003 16:30
- Location: West Coast Road, Manukau Peninsula, North Island
- Has thanked: 0
- Been thanked: 0
- Contact:
-
- Posts: 2068
- Joined: Wed 12/03/2003 19:47
- Location: Mt Somers
- Has thanked: 19 times
- Been thanked: 41 times
Ben wrote:
I think the pic above of which I took today is what your referring to, darkish looking cloud looking from New Brighton Pier towards city center (buildings can be seen in the far background of picture). I put it on yahoo photos and it worked!BUT it does look ominous to the northeast.
Cheers
Aaron Wilkinson
- NZstorm
- Posts: 11333
- Joined: Mon 10/03/2003 19:38
- Location: Grey Lynn, Auckland
- Has thanked: 342 times
- Been thanked: 361 times
Skies looked very unstable all day on the east to north horizon with some large looking but disant cb.
Lots of T/cu again today with one cb developing over Auckland early afternoon. The cloud was much to close to me to get a good photo of it.
I was at Howick and the anvil was blowing back over the top of me in an upper westerly. Todays wind profile is light easterly to about 7000m then westerly above that. I had a report of very heavy rain in the Balmoral area with this cloud. The shower drifted slowly westward during the afternoon and out to sea by 3pm.
Lots of T/cu again today with one cb developing over Auckland early afternoon. The cloud was much to close to me to get a good photo of it.
I was at Howick and the anvil was blowing back over the top of me in an upper westerly. Todays wind profile is light easterly to about 7000m then westerly above that. I had a report of very heavy rain in the Balmoral area with this cloud. The shower drifted slowly westward during the afternoon and out to sea by 3pm.
-
- Posts: 1012
- Joined: Sun 30/03/2003 18:28
- Location: Hobsonville Point, Auckland
- Has thanked: 36 times
- Been thanked: 78 times
- Contact:
I watched a couple of nice buildups out to the distant west and north on the drive home tonight. There was a large anvil maybe somewhere level with the top of the Kaipara. I managed to take a picture while sitting in the car going nowhere on the motorway but it didn't turn ouit very well. Nice shot of the barrier though!
Cheers,
G
Cheers,
G
- Michael
- Posts: 7210
- Joined: Thu 27/03/2003 12:04
- Location: Rainy Manurewa, Auckland - "City of Gales"
- Has thanked: 0
- Been thanked: 1 time
- Contact:
[quote="NZ Thunderstorm Soc"]
The moon here looked quite good this evening, with a halo from the cirrus up there plus Mars shining away. Would of made a good photo if I had a suitable camera!
Just a little off topic since it appears to be clear in most places-Does Vega in Lyra get above the horizon in Christchurch? Can you see it? It should do at declination 38 north It will be due north in the evening about now for this time of the year.
The moon here looked quite good this evening, with a halo from the cirrus up there plus Mars shining away. Would of made a good photo if I had a suitable camera!
Just a little off topic since it appears to be clear in most places-Does Vega in Lyra get above the horizon in Christchurch? Can you see it? It should do at declination 38 north It will be due north in the evening about now for this time of the year.
-
- Posts: 18567
- Joined: Wed 12/03/2003 22:08
- Location: Raukapuka Geraldine
- Has thanked: 1789 times
- Been thanked: 1430 times
-
- Posts: 18567
- Joined: Wed 12/03/2003 22:08
- Location: Raukapuka Geraldine
- Has thanked: 1789 times
- Been thanked: 1430 times