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Chunky Pea
28 February 2018 13:29:19


 


Is it actually melting to liquid or just disappearing? If the latter then surely it is just sublimating away due to the very low dewpoints, which are widely below -10C today. Here in London the only places that seem to be damp are salted roads and pavements, and badly insulated roofs. The rest of the snow isn't melting, just sublimating.


Originally Posted by: Rob K 


 


This is what happened to the dusting I got this morning. Even roads were covered but rather than melt, it just disappeared. Roads & paths still very dry. Td -6.0c 

Current Conditions
https://t.ly/MEYqg 

"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Joe Bloggs
28 February 2018 13:29:30


 


Is it actually melting to liquid or just disappearing? If the latter then surely it is just sublimating away due to the very low dewpoints, which are widely below -10C today. Here in London the only places that seem to be damp are salted roads and pavements, and badly insulated roofs. The rest of the snow isn't melting, just sublimating.


Originally Posted by: Rob K 


Spot on. The Met Office have also made reference to this phenomenon. 


Manchester City Centre, 31m ASL
Brian Gaze
28 February 2018 13:30:56


 


Is it actually melting to liquid or just disappearing? If the latter then surely it is just sublimating away due to the very low dewpoints, which are widely below -10C today. Here in London the only places that seem to be damp are salted roads and pavements, and badly insulated roofs. The rest of the snow isn't melting, just sublimating.


Originally Posted by: Rob K 


No it's definitely not sublimating! There are pools of water forming on the surfaces! I've had my thermal imaging camera on it to see what's going on. 

Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Brian Gaze
28 February 2018 13:31:56


 


Spot on. The Met Office have also made reference to this phenomenon. 


Originally Posted by: Joe Bloggs 


For goodness sake it isn't sublimating! We've been talking about sublimation on here for several days and I can remember my science teacher explaining it to me before you were born. 

Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Rob K
28 February 2018 13:34:41


 


No it's definitely not sublimating! There are pools of water forming on the surfaces! I've had my thermal imaging camera on it to see what's going on. 


Originally Posted by: Brian Gaze 


That's strange then. You're getting pools of unfrozen water on surfaces that are below freezing according to the thermal imaging camera? No idea in that case, and it certainly isn't happening round here. 

Yateley, NE Hampshire, 73m asl
"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome
Chunky Pea
28 February 2018 13:35:07


 


No it's definitely not sublimating! There are pools of water forming on the surfaces! I've had my thermal imaging camera on it to see what's going on. 


Originally Posted by: Brian Gaze 


Very surprised you have pools of water at -3.5c? The water in mop bucket out the back here (not the most glamourous of measures I admit) is frozen solid and temp is hovering just below 0c. 

Current Conditions
https://t.ly/MEYqg 

"You don't have to know anything to have an opinion"
--Roger P, 12/Oct/2022
Rob K
28 February 2018 13:38:16
I think Brian has had undersoil heating installed 🙂
Yateley, NE Hampshire, 73m asl
"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome
noodle doodle
28 February 2018 13:40:05
Red warning for Edinburgh now, snowing steadily. Looks like one of my tickets has at least 4 numbers
Joe Bloggs
28 February 2018 13:40:37


 


For goodness sake it isn't sublimating! We've been talking about sublimation on here for several days and I can remember my science teacher explaining it to me before you were born. 


Originally Posted by: Brian Gaze 


No need to be so rude, Brian.


Manchester City Centre, 31m ASL
Graham.W
28 February 2018 13:43:40

I'm with you on this one Brian. I noticed at lunchtime here in Kettering how the snow on a lot of the pavements and roads had melted even though it was -1 Degree.C yet there were icicles hanging down at the back of my car!!


 

Retron
28 February 2018 13:46:03


Davis VP2 says it's -3.5C. Despite that the rate of thaw when the sun comes out beggars belief. Even when it clouds over the thaw continues on concrete / stone surfaces. It's extraordinary. Never seen anything like it (I mean the combination of thaw and air temperatures well below 0C).


Originally Posted by: Brian Gaze 


There's enough snow on the ground here to protect against that, but I can confirm the sun's power - for the second day in a row it's been heating up branches etc and of course the snow's been drip-drip-dripping from them as a result. Yesterday that stopped the instant the sun went behind the houses across the road. I'd expect the same today, as it's around -2 out there.


(No, that isn't a moan, just a corroboration).

Leysdown, north Kent
JACKO4EVER
28 February 2018 13:49:13


 


I thought you were near Melton Mowbray? Loads of showers on the radar in that area. You must be the unluckiest person on TWO to avoid any snow from that lot.


Originally Posted by: Rob K 


I actually live just outside of the highest village in the Melton area on the Leicestershire Wolds and I can confirm steady light snow this morning that amounted to NOTHING. I think some of these showers are readily dissipating before hitting the ground due to the air being so dry. 

Justin W
28 February 2018 13:49:36


 


There's enough snow on the ground here to protect against that, but I can confirm the sun's power - for the second day in a row it's been heating up branches etc and of course the snow's been drip-drip-dripping from them as a result. Yesterday that stopped the instant the sun went behind the houses across the road. I'd expect the same today, as it's around -2 out there.


(No, that isn't a moan, just a corroboration).


Originally Posted by: Retron 


It's great! Like being in the Mid West in late winter - I shovelled the new snow off the drive early this morning and then swept it and now it's clear and bone dry. Makes it a damn sight easier and no need to put vile and destructive salt on anything.


 

Yo yo yo. 148-3 to the 3 to the 6 to the 9, representing the ABQ, what up, biatch?
Brian Gaze
28 February 2018 13:49:51

I appreciate it's not particularly clear but here's a pic which illustrates what I'm talking about: 



Here's what thermal imaging shows:


Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Brian Gaze
28 February 2018 13:52:10


 


No need to be so rude, Brian.


Originally Posted by: Joe Bloggs 


Sorry. Not having a go at you personally but there have been several comments in recent days about people not knowing the difference between sublimation and melting.  

Brian Gaze
Berkhamsted
TWO Buzz - get the latest news and views 
"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Nordic Snowman
28 February 2018 13:52:24


 


 


So would i, but my feet would get wet...i am looking across to the Isle of Wight and can see the SNOW showers cutting right through the Island, with snow falling 3 miles away -but on the beaches this side, its a beautiful spring day and hard to beieve that it MAY actually snow tomorrow on this side of the Solent, although i still have my doubts that with changes aloft that it will be too warm for snow...the cold has now peaked! 


Originally Posted by: PFCSCOTTY 


Indeed.


You can almost smell the snow over the IOW and more especially over the Channel.

Bjorli, Norway

Website 
Retron
28 February 2018 13:54:44


It's great! Like being in the Mid West in late winter - I shovelled the new snow off the drive early this morning and then swept it and now it's clear and bone dry. Makes it a damn sight easier and no need to put vile and destructive salt on anything.


Originally Posted by: Justin W 


I may have exaggeratedly shovelled the snow off the drive earlier just to see it swirling through the air as it landed on (top of the snow already on) the lawn. Again, it's been a long time since we saw that sort of snow! It's much better for driving on too.


Hmm, this is a moaning thread isn't it. Erm - my moan is that I don't have a decent screen any more for my thermometer sensor which, despite allegedly being okay to mount outside, really needs a screen. So it's saying it's above zero, even though it clearly isn't (as the presence of icicles on the car over the road confirms).


Also, no icicles on my house as the guttering isn't being overwhelmed. I guess I could shovel extra snow on there, or turn my heating pump up a couple of notches to make water flow out the overflow.... nah, on second thoughts I'll leave things as they are!


 


 


 

Leysdown, north Kent
Nordic Snowman
28 February 2018 13:57:14


Davis VP2 says it's -3.5C. Despite that the rate of thaw when the sun comes out beggars belief. Even when it clouds over the thaw continues on concrete / stone surfaces. It's extraordinary. Never seen anything like it (I mean the combination of thaw and air temperatures well below 0C).


Originally Posted by: Brian Gaze 


Definitely the time of year Brian. The solar effects even when cloudy are strong at this time of year and will melt even when below freezing. After a mild winter generally, the ground is simply not cold enough too - especially on S facing paths etc. 

Bjorli, Norway

Website 
Joe Bloggs
28 February 2018 13:58:25


 


Sorry. Not having a go at you personally but there have been several comments in recent days about people not knowing the difference between sublimation and melting.  


Originally Posted by: Brian Gaze 


It's fine - it was the first time I'd read such comments. 


I do think this spell is making people tetchy. 


I've annoyed at least three people on here in the past week.. enough to give me a complex!  


Manchester City Centre, 31m ASL
tallyho_83
28 February 2018 14:32:26


 


Definitely the time of year Brian. The solar effects even when cloudy are strong at this time of year and will melt even when below freezing. After a mild winter generally, the ground is simply not cold enough too - especially on S facing paths etc. 


Originally Posted by: Nordic Snowman 


 


So here I am at day 3 of this feast from the east - I see snowy showers in the distance looking SE this time only to evaporate and fragment as they approach Exeter Quay.


How has it been in Pompey? any snow covering yet?

Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
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Magical Moon
www.magical-moon.com


RobSnowman
28 February 2018 14:40:17
Tarmac temperatures have been getting to around 12 degrees C the last few days in the midday sunshine, so thin snow will soon melt. Even as clouds come and go, tarmac temperatures won’t drop back below zero until after dusk. Sublimation is also going on but it requires an order of magnitude more energy to go from ice to water vapour so it’s a secondary process for snow clearance in this situation, but windy, dry encourages the process.
I built this snowman of myself.
Solar Cycles
28 February 2018 15:09:35


 


Looks like plenty of showers making it as far west as you. One heavy one passed just to the north over Clitheroe recently. More (not quite as heavy) crossing Huddersfield and Ripponden right now and might hit Blackburn.


Originally Posted by: Rob K 

Indeed Rob, I’ve just reported one now in the snow thread. As usual I was wrong. 😂😂

rockhopper
28 February 2018 15:19:00
Perth to Aberdeen and back this morning. Cold, wintry and windy yes, but nowhere near the snowfall that was forecast. Eastern Scotland was meant to be the place to be but anywhere North of Fife has just had heavy but very brief showers.

Just outside the red warning zone which, judging by the radar, looks accurate as there isn't much shower activity upstream north of fife.
Perth. Scotland. 55m asl
Saint Snow
28 February 2018 16:00:34


 


It's fine - it was the first time I'd read such comments. 


I do think this spell is making people tetchy. 


I've annoyed at least three people on here in the past week.. enough to give me a complex!  


Originally Posted by: Joe Bloggs 


 


Don't count me amongst them - you're one of the good guys.



Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
"How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics."
Aneurin Bevan
Joe Bloggs
28 February 2018 16:07:49


 


 


Don't count me amongst them - you're one of the good guys.



Originally Posted by: Saint Snow 


Cheque is in the post mate. Cheers. 


Moan from me - we've been unlucky in the city centre today. South Manc (Sale, Altrincham) has had a few beefy showers and they have a decent fresh covering. 


Manchester City Centre, 31m ASL
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