Foggy Chch

tich · Unread post by **tich** » Sun 11/09/2005 14:02

Supposed to become fine today (like yesterday), but low cloud and fog is persisting in the city.

Cycled out to New Brighton - worse out there, with thicker (sea) fog, while back in the central city, it's more like low cloud. Looking forward to a clearance, but not much sign of that yet.

03Stormchaser · Unread post by **03Stormchaser** » Sun 11/09/2005 14:42

Climbed Mt Oxford Yesterday nice clear day up there. As you can see in the below pic (aaron actually in it) Chch would be in the distance. Crappy low level cloundetc was covering much of the plains

other photo's can be found here

Gary Roberts · Unread post by **Gary Roberts** » Sun 11/09/2005 14:55

03 Stormchaser wrote:Climbed Mt Oxford Yesterday nice clear day up there. As you can see in the below pic (aaron actually in it) Chch would be in the distance. Crappy low level cloundetc was covering much of the plains

[img]horror.jpg[/img]

other photo's can be found here

Nice pics, shame about the weirdo in them...

NZstorm · Unread post by **NZstorm** » Sun 11/09/2005 16:16

Nice shot. The weather is like that in Auckland today as well, above the clouds.

tich · Unread post by **tich** » Sun 11/09/2005 17:58

Looking forward to a clearance, but not much sign of that yet.

Unfortunately that clearance never arrived

, even though MetService hasn't changed its forecast for Canterbury. (fog morning and evening)
Great shots from above the cloud.

RWood · Unread post by **RWood** » Sun 11/09/2005 19:24

tich wrote:
Looking forward to a clearance, but not much sign of that yet.
Unfortunately that clearance never arrived , even though MetService hasn't changed its forecast for Canterbury. (fog morning and evening)
Great shots from above the cloud.

Can recall a summer's day when the whole plains had such cover under a weak 1016 - stopped at Burke's Pass (W end).

I sometimes fantasise about a blocking situation like the current one (which is now collapsing I guess), lasting for weeks (*) - superb w/end here. But John G and other Cantabrians might not be amused at all!

(* actually in July 2000 something like tha

t did happen...)

Michael · Unread post by **Michael** » Sun 11/09/2005 20:56

In Spring 1985 it did that and many times throughout 1989

RWood wrote:
I sometimes fantasise about a blocking situation like the current one (which is now collapsing I guess), lasting for weeks (*) - superb w/end here. But John G and other Cantabrians might not be amused at all!

(* actually in July 2000 something like tha t did happen...)

tich · Unread post by **tich** » Mon 12/09/2005 09:32

Foggy again this morning in Chch. Going by past occurrences it should at least partially clear in afternoon (usually does here), but return in evening.

TonyT · Unread post by **TonyT** » Mon 12/09/2005 09:54

Fog cleared here during the night and cold by dawn. down to 1deg.

tich · Unread post by **tich** » Mon 12/09/2005 11:06

Fog cleared here during the night and cold by dawn. down to 1deg.

Fog has now spartially cleared in Chch, with the sun coming out at times.

Storm Struck · Unread post by **Storm Struck** » Mon 12/09/2005 15:59

Fog cleared at about half past eleven with blue skies everywhere and nice warm sun

lasted until just before 3pm and then quckly rolled in again and now its overcast and bleak again

.
Cheers
JASON.

tich · Unread post by **tich** » Mon 12/09/2005 17:36

Fog cleared at about half past eleven with blue skies everywhere and nice warm sun lasted until just before 3pm and then quckly rolled in again and now its overcast and bleak again .

Ditto for central Chch, though low cloud and fog quite probably persisted for much of the day out by the coast.

03Stormchaser · Unread post by **03Stormchaser** » Mon 12/09/2005 19:38

Modis Sat image taken at 12/09/05 02:35 UTC (2:35 p.m. NZ Time)

NZ Thunderstorm Soc · Mon 12/09/2005 22:22

Good photo of that satelite pict there Steve.
You can see a slight circulation going on within the cloud.
Probably why is was Ne this afternoon and now it is southerly now, with a bit of a barometer pressure rise.

JohnGaul
NZTS

RWood · Unread post by **RWood** » Tue 13/09/2005 11:11

Relief from fog and low cloud for coastal/plains Canterbury soon with a change to more westerly conditions this week? It must have been a very cloudy month in Ch'ch so far.

Fine again here after thin broken cloud cleared, expect the cruddy stuff to roll in tonight or tomorrow.

tich · Unread post by **tich** » Tue 13/09/2005 19:48

Another foggy start to the day around Chch today, but I left for the peninsula late morning, and it cleared after about Taitapu. Fine out near Akaroa; just a little cloud and mist about the tops. I guess Chch stayed dull, as the Hillmorton maximum only reached 10C.

03Stormchaser · Unread post by **03Stormchaser** » Tue 13/09/2005 19:56

Question: what actually causes the foggy conditions we have had lately?? TonyT?

NZstorm · Unread post by **NZstorm** » Tue 13/09/2005 20:11

That will be 'warm advective fog', mild moist air coming in from the north and being cooled to its dewpoint by cold sea temps. Not uncommon in the South Island east coast.

Gary Roberts · Unread post by **Gary Roberts** » Tue 13/09/2005 21:30

NZstorm wrote:That will be 'warm advective fog', mild moist air coming in from the north and being cooled to its dewpoint by cold sea temps. Not uncommon in the South Island east coast.

I was in Oamaru today, and it was dismal and cold, like a winter day. Yet in the Mackenzie it was wonderful. This is a common circumstance. The weather usually begins to deteriorate somewhere between Otematata and Kurow, and getting progressively worse the further east you travel through the Waitaki valley.

NZ Thunderstorm Soc · Tue 13/09/2005 23:42

tich wrote:Another foggy start to the day around Chch today, but I left for the peninsula late morning, and it cleared after about Taitapu. Fine out near Akaroa; just a little cloud and mist about the tops. I guess Chch stayed dull, as the Hillmorton maximum only reached 10C.

Yes Ben that is what I call the "NE Kink Scenario" when it is overcast all day here in the city but you look to the south beyond Halswell way and you see clear blue sky.
The Ne was up a bit today compared to yesterday and the "Kink" effect was working because of the effect of the Port Hills/BP in such a scenario.
It would been sunny out at Motokorara/Birdling's Flat etc

JohnGaul
NZTS

RWood · Unread post by **RWood** » Tue 13/09/2005 23:47

Cant'y plains (and coastal Otago as well) have at times had some very dull months when such airflows were unusually dominant - at least they don't get the phenomenon (the "garua") that hits the near rainless Peruvian coast each winter - several months of very persistent low cloud to enjoy

Gary Roberts · Unread post by **Gary Roberts** » Wed 14/09/2005 08:03

RWood wrote:Cant'y plains (and coastal Otago as well) have at times had some very dull months when such airflows were unusually dominant - at least they don't get the phenomenon (the "garua") that hits the near rainless Peruvian coast each winter - several months of very persistent low cloud to enjoy

I'm vaguely familiar with the weather patterns along that coast, and particularly in relation to the Andean peaks and foothills of Chile (very important astronomical area now) and I wish our own climate and weather was so reliable!

TonyT · Unread post by **TonyT** » Wed 14/09/2005 08:51

NZ Thunderstorm Soc wrote:The Ne was up a bit today compared to yesterday and the "Kink" effect was working because of the effect of the Port Hills/BP in such a scenario.
It would been sunny out at Motokorara/Birdling's Flat etc

JohnGaul
NZTS

And was sunny for 90% of the day out Amberley way too.

RWood · Unread post by **RWood** » Wed 14/09/2005 09:22

Gary Roberts wrote:
RWood wrote:Cant'y plains (and coastal Otago as well) have at times had some very dull months when such airflows were unusually dominant - at least they don't get the phenomenon (the "garua") that hits the near rainless Peruvian coast each winter - several months of very persistent low cloud to enjoy
I'm vaguely familiar with the weather patterns along that coast, and particularly in relation to the Andean peaks and foothills of Chile (very important astronomical area now) and I wish our own climate and weather was so reliable!

The inland areas (Southern Peru to central Chile) are very sunny, especially near Tropic of Capricorn latitudes (over 85% of possible sun there), so the astronomers have had a large zone in which to pick out locations which are also relatively free of dust and pollutants.

The lack of rain is very pleasant (apart from the issue of water supply!)
and temps very equitable on the coast - Antofagasta's historical extremes are about 30C and 5C. Even in the inland desert the temperature range is not all that high.

Many would say such weather is the ultimate in boringness, but I could stand quite a lot of it! And some of the sub-Andean areas are scenically fascinating, with multicoloured rocks and landforms, plus a large salt lake.

Gary Roberts · Unread post by **Gary Roberts** » Wed 14/09/2005 12:40

RWood wrote:Many would say such weather is the ultimate in boringness, but I could stand quite a lot of it!

When it comes to weather and climate, astronomers prefer boring.

Still, those sites are a long way from Antofagasta or La Serena, so have the added great expense of necessary 'keep-them-sane' infrastructure.