General December Weather

[jamie]

It looks like December will get off to a nice start for most.

Mid-late during the week some wet weather comes. GFS is hinting at some nice cold air aloft moving over the country and a large low sitting over us.

[Tornado Tim]

GFS is hinting at some nice cold air aloft moving over the country and a large low sitting over us.

Hope that the SFC temps will be high enough to create good instability......

[NZstorm]

Warm humid air arrives from the north Taman tomorrow and hangs around for a few days. Should feel a bit more like summer atleast!

Dewpoint chart for 6pm Sunday.

[NZ Thunderstorm Soc]

Interesting to note that on MetService's Thunderstorm Outlook for today it mentions the slightest possibility of lightning disharges in the wave cloud associated with the NW. I can remember going to a MetSoc meeting years ago when this fellow from Colgate mentioned that he had observed lightning in NW Arch cloud overhead on the odd occasion. I just thought that I would mention this. Thankyou.

[cantygal]

Another busy day John

[Orion]

23.6 degrees here at present; it has clouded over in the last hour or so.
A slight breeze from the south-east.

[snowstormwatcher]

23 degrees here too, High overcast cloud with a few spots of rain earlier on. No sign of the NW wind that is expected.

[Orion]

25.8 degrees now.
Pressure has fallen from 1009 to 1004.7 hPa in the last hour and a half.

[Storm Struck]

Interesting to note that on MetService's Thunderstorm Outlook for today it mentions the slightest possibility of lightning disharges in the wave cloud associated with the NW. I can remember going to a MetSoc meeting years ago when this fellow from Colgate mentioned that he had observed lightning in NW Arch cloud overhead on the odd occasion. I just thought that I would mention this. Thankyou.

I would have thought the risk would need to be more widespread and higher on the west coast for this to happen, the MS only cover a coastal low risk for the west coast.
Abit of a risk tomorrow too south of christchurch although it will be alot later on maybe even evening for some parts as a pool of air drifts over the lower south, warm dry air further north for most of the day though but possibly some light coastal winds south of christchurch as the NW flow dies off.

[Weetbicks]

I'm so frustrated with looking at Metservice forecasts for Christchurch city. Every time it says 23, 24, 27 degrees and so on, it's more like 15 degrees due to the Nor Easter. Can't they just assume that Chch is going to have the cold Nor Easter always blowing (as it always seems to). Sure there may be NW up high or inland but the number of times it makes it to Christchurch seem to be so few and far between. I was looking forward to a nice warm day and instead it's another indoor day because it's too windy and cold outside. I can't blame Metservice for the weather but why are they consistently forecasting higher temperatures than we ever reach?

[Captain Salty]

one's breakfast news kept forecasting 28 for chch this morning lol. I don't know if they were looking at tomorrows forecast or what?

[Orion]

26.2 degrees now and a fresh NW breeze has arrived.
Humidity down to 50% (was 55% earlier)

[NZ Thunderstorm Soc]

Yeah, we were in town around lunch-time and it was a bit cool with an easterly blowing. Had to grab the jersey from the car.

[Richard]

Interesting to note that on MetService's Thunderstorm Outlook for today it mentions the slightest possibility of lightning disharges in the wave cloud associated with the NW. I can remember going to a MetSoc meeting years ago when this fellow from Colgate mentioned that he had observed lightning in NW Arch cloud overhead on the odd occasion. I just thought that I would mention this. Thankyou.

Happens at least once every two of three years about this area John,the best example of it was when i was living out the back of Amberley in summer of 1991,one night about 3.00am and i was woken by thunder so of cause i had to go outside and watch it,it was a night of arch cloud but also a full moon or near to it so this added to spectacle,the lightning was all the horizontal type which zipped across from west to east beneath the high cloud,after about an of this i hoped on the farm 4x4 and drove up to the highest point on the property(300m)from there you could see the lightning from about Timaru all the way up to Kaikoura,it was amazing to watch.It was at the same time when Granity on the West Coast got flooded,the lightning on this side even made the papers i remember.

[spwill]

Some good thunder possibilities still showing up for NZ from mid next week .

I think it still looks too warm in the upper levels for thunder along the Canterbury coast tomorrow afternoon/evening.

[Richard]

Yes yes yes,just had a overhead lightning strike

[Richard]

Now a second one which is coming from just to the NE of us.

[NZ Thunderstorm Soc]

Wow. That's fantastic
Thanks for that.
NW here from about 5pm, with a pathetic looking Arch forms seen from here.
Temperature just scrapped 20C with the wind change from the NE, with nothing hot about the possibilities about the possible temperatures for the day being in the mid twenties as forecasted.
Keep your fingers crossed. May get to 22C tomorrow.

[Richard]

I'm so frustrated with looking at Metservice forecasts for Christchurch city. Every time it says 23, 24, 27 degrees and so on, it's more like 15 degrees due to the Nor Easter. Can't they just assume that Chch is going to have the cold Nor Easter always blowing (as it always seems to). Sure there may be NW up high or inland but the number of times it makes it to Christchurch seem to be so few and far between. I was looking forward to a nice warm day and instead it's another indoor day because it's too windy and cold outside. I can't blame Metservice for the weather but why are they consistently forecasting higher temperatures than we ever reach?

If the NW had reached CHCH it certainly would have been 28+ because it reached 24.5 here and the NW is normally cooler here than CHCH,been a strong wind at times too,but thankfully a warm one

[NZstorm]

Some good thunder possibilities still showing up for NZ from mid next week .

I think it still looks too warm in the upper levels for thunder along the Canterbury coast tomorrow afternoon/evening.

Yes, still a strong longwave pattern on the gfs with polar air for later in the week.

As for tomorrows' eastern South Island chances, I agree, the shortwave doesn't reach the South Island until late evening, too late in the day for thunder. Could still be a shower or two on sea breeze convergence though.

[Richard]

There's blue on the radar ATM in yet there's not a drop of rain out there

[NZstorm]

Whenuapai sounding last night showing the upper level subtropical airmass over us with cool surface air.
Areas away from the west coast should warm up a bit today.

[03Stormchaser]

Metservice doing a good job today, currently 24C

[CHCH Weather Chaser]

26 degrees at the airport, 27.5 locally. Will get close to 30 if this thin high cloud budges.

[CHCH Weather Chaser]

Have hit the magic 30 just up the road! (Jeffs Station)

Temperature 30.0 C
Dewpoint 12.0 C
Humidity 33 %

Wind Speed 8 km/h
Average Wind Speed 1 km/h
Wind Direction North Nth East
Barometer 994.3 hPa

Rainfall (Last 10 Mins) 0.0 mm