At present GFS is only really suggesting a couple of mild days before things return to seasonal average albeit that confidence drops in that from 04 December. There should be some good early conditions in many of the places openning this weekend in Switzerland and Austria.
Obviously A snowHead isn't a real person
Obviously A snowHead isn't a real person
Verbier has been dumping for most of the week. The lifts are opening tomoorow.
Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
ECM a bit milder than GFS from 04 December this evening. But too far out to have much confidence either way.
ECM keeping on a milder path. Substantial difference between the two.
Then you can post your own questions or snow reports...
Then you can post your own questions or snow reports...
06z swings back to a milder outlook in FI though still a fair spread from 04 December.
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After all it is free
Build the tension, why dont you. Lol
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I've been keeping a close eye on conditions/forecasts for Tignes and snow-forecast.com appears to be suggesting night-time temps at the lowest lift levels significantly lower than at the mid height lifts, though morning temps are similar. How does that work then?
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Inversions
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snowHeads are a friendly bunch.
ECM ends it's run on a rather mild note.
And love to help out and answer questions and of course, read each other's snow reports.
And love to help out and answer questions and of course, read each other's snow reports.
Quote:
night-time temps at the lowest lift levels significantly lower than at the mid height lifts, though morning temps are similar. How does that work then?
temperature inversion - in still air, the cold sits at the bottom of the valley. Could be even colder in Bourg St Maurice. There can be several inversions as you drive up.
So if you're just off somewhere snowy come back and post a snow report of your own and we'll all love you very much
So if you're just off somewhere snowy come back and post a snow report of your own and we'll all love you very much
I know it is called an inversion, but I was wondering why the inversion only occurs each afternoon/night-time and not during the morning?
You know it makes sense.
You know it makes sense.
Quote:
I was wondering why the inversion only occurs each afternoon/night-time and not during the morning?
It doesn't. I have frequently got in my car up the mountain, in the morning, and driven down through dropping temperatures.
Otherwise you'll just go on seeing the one name:
Otherwise you'll just go on seeing the one name:
@Ray Zorro, because the inversion was out partying the night before and had a stinking hangover?
Poster: A snowHead
Poster: A snowHead
Ricklovesthepowder wrote:
@Ray Zorro, because the inversion was out partying the night before and had a stinking hangover?
There speaks the voice of experience!
Obviously A snowHead isn't a real person
Obviously A snowHead isn't a real person
there isn't always an inversion - in low pressure, stormy, unstable sort of weather it doesn't happen. So other factors which change (wind springing up with a front, etc etc) will determine when the inversion starts or stops.
It's interesting driving up (or down) through two separate inversions at different altitudes.
In high pressure times it's often FAR warmer up the mountain than down in the valleys, with freezing fog down there, and the smoke from chimneys just spreading out horizontally. I think that's why places like Grenoble get bad air pollution.
Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
Ray Zorro wrote:
I know it is called an inversion, but I was wondering why the inversion only occurs each afternoon/night-time and not during the morning?
In fact it's the opposite. Inversions are caused by subsiding air so are generally strongest in the morning before the sun has the chance to heat the ground and subsequently the air above. As the ground warms up thermal mixing occurs and the inversion is often broken, at least in summer. At this time of year however the sun is often not strong enough to heat the ground sufficiently so inversions will often hang around for a long time during anti-cyclonic weather.
I was wondering why the inversion only occurs each afternoon/night-time and not during the morning?
It doesn't. I have frequently got in my car up the mountain, in the morning, and driven down through dropping temperatures.
I remember cycling down col de la madeleine one cold day (notionally not in the winter) and it was a mild 4 degrees at the top and on the way down it got colder instead of warming up and I arrived at a hairpin with my fingers not able to brake properly.
Anyway, snowHeads is much more fun if you do.
Anyway, snowHeads is much more fun if you do.
pam w wrote:
Quote:
I was wondering why the inversion only occurs each afternoon/night-time and not during the morning?
It doesn't.
But it does - and that was the reason for my (badly worded) question.
e.g. next Wednesday Lower/Mid and Upper temps are forecasted to be (morning) 5/4/-1 and (evening) -7/2/-3 so not obvious inversion in the morning, but a clear one at night time.
@Ray Zorro, You asked why it doesn't occur during the morning. If you were just referring to that very particular morning , rather than mornings in general, the answer will lie in the very particular conditions expected at that spot, that morning. Inversions can be present - or absent - at any time of the day or night and at any time of year, too.
Then you can post your own questions or snow reports...
Then you can post your own questions or snow reports...
or perhaps it's just a fairly rubbish weather forecast....
After all it is free
After all it is free
pam w wrote:
or perhaps it's just a fairly rubbish weather forecast....
They exist? Really?
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I'm not sure the snowforecast.com forecasts necessarily srtand up to that degree of scrutiny.
Ski the Net with snowHeads
Ski the Net with snowHeads
Quote:
I'm not sure the snowforecast.com forecasts necessarily srtand up to that degree of scrutiny.
snowHeads are a friendly bunch.
snowHeads are a friendly bunch.
under a new name wrote:
pam w wrote:
or perhaps it's just a fairly rubbish weather forecast....
They exist? Really?
I once shared a house with a 'journalist' in Cheltenham. We spent many a drunken evening making up the horoscope as that was one of her jobs to do. Sounds a bit like some of the forecasts
And love to help out and answer questions and of course, read each other's snow reports.
And love to help out and answer questions and of course, read each other's snow reports.
The last few GFS runs have shown building support for a cold spell next weekend in the Alps with snow to low levels. After warmer weather Tuesday to Thursday cold weather would push down on Friday and low pressure would develop in the Mediterranean on Saturday.
However, ECM has shown no sign of this and is sticking to a mild weekend with high pressure ruling the roost.
But which one will come out on top?
So if you're just off somewhere snowy come back and post a snow report of your own and we'll all love you very much
So if you're just off somewhere snowy come back and post a snow report of your own and we'll all love you very much
Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
Look folks don't worry. My zx81 GFS simulator predicted snow on 4th December back in July and I just ran the 15:00 run again and it it still stands by that.
emwmarine wrote:
Imagine there will be snow in November that will stick around at higher altitudes only, then some more in December, Jan, Feb, Mar and April by when it will start melting and only be useful at high altitudes going into May.
The first really big dump will be early this year, due to Elle Ningoin, on Friday 4th December. Around 50cm is forecast for the 3Vs.
@emwmarine, no. I can define exactly a really big dump and send you pictures if you like.
Then you can post your own questions or snow reports...
Then you can post your own questions or snow reports...
Be careful @under a new name, it's curry night here.
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After all it is free
12z GFS isn't backing up the 06z.
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pam w wrote:
@Ray Zorro, You asked why it doesn't occur during the morning. If you were just referring to that very particular morning , rather than mornings in general, the answer will lie in the very particular conditions expected at that spot, that morning. Inversions can be present - or absent - at any time of the day or night and at any time of year, too.
No, I asked about mornings in the plural and gave the specific example of one particular day. It is forecasted for several days next week.
But, thanks for attempting to answer, I'm happy to leave it there.
"Outbreaks of rain will turn to snow in areas just to the north of the Central Belt during Sunday morning, persisting into the afternoon in places. This may bring a few cm of snow even to low levels, while 10-15 cm could accumulate over some high ground areas.In other areas a mix of wintry showers persists through the daytime on Sunday, becoming heavier and more widespread, and spreading south during the evening and nighttime period, leading to further accumulating snow in places, as well as an enhanced risk of ice into Monday morning.
Please be aware of the need to take extra care and allow more time for travel, but also keep up to date with any further updates to this warning - the southern limit of the more widespread snow is particularly uncertain.
Chief Forecaster's assessment
Wintry showers will continue across much of Scotland on Sunday and overnight into Monday. To complicate matters, an area of low pressure is expected to track across southern Scotland, with the risk of more widespread sleet or snow to the north of the low centre for a few hours. The southern limit of this wintry threat is liable to some adjustment as there's going to be a very sharp cut off between the cold air and much milder air in southern Scotland. For this reason, this warning will very likely be updated on Sunday morning. On current evidence, the most likely areas to be affected by this more widespread snow would be Argyll, west Dunbartonshire, Stirlingshire, Clackmannanshire, Fife, Perth & Kinross and Angus."
FAQ
Poster: A snowHead
