North West England Regional Discussion 20/01/13 18z ------>

[Stratocumulus perlucidus]

If the ground temperature goes below 0°C, would the snow start to stick even on wet ground? So far tonight, the only snow that has stuck has been on leftovers from Friday and on car roofs.

evap cooling cools the slus. Down that makes it easier to stick

[greybing]

If the ground temperature goes below 0°C, would the snow start to stick even on wet ground? So far tonight, the only snow that has stuck has been on leftovers from Friday and on car roofs.

I would think so yes Edited January 21, 2013 by greybing

[Backtrack]

yeah that was quite bad...but we do need to see temps and dp's going down a lot, what is the upper air temp now?

-6C right now, elsewhere -8C.

[Snowmad79]

btch ass heavy stuff ever so close to our east. Talk about scraping the barrel lol. Looks like the Pennines are blocking it out :S

Infact I'm quite annoyed to see I've ended up in the middle two heavy heavy blobs to the West and to the East! I'd have to say, that's an Orographic shadow.

Edited January 21, 2013 by Snowmad79

[HotCuppa]

-6C right now, elsewhere -8C.

could really do with seeing that down to around -8C too, not sure if its progged to or not.

dp is 0.7 slowly falling, temp 0.8C static 0.o

[Brass_Monkeys]

If the ground temperature goes below 0°C, would the snow start to stick even on wet ground? So far tonight, the only snow that has stuck has been on leftovers from Friday and on car roofs.

The snow has got a little heavier recently, if it carries on like this for a couple of hours it should stick to all surfaces

If the ground temp is at 0C then the wet surfaces would turn to ice, helping the snow stick more readily.

Edited January 21, 2013 by Brass_Monkeys

[GazinBurnley]

Becoming quite heavy here now and the wind is picking up

[LiverBird]

1 ignore the bbc

2 ignore itv

3 ignore all tv forecasts, they all stink

Thanks HC. That just leaves you then!

[HotCuppa]

exactly right if the surface was 0C it would be cold enough to form ice. All that is needed is heavier prolonged precipitation.

[Backtrack]

could really do with seeing that down to around -8C too, not sure if its progged to or not.

dp is 0.7 slowly falling, temp 0.8C static 0.o

Temp 0.6C DP 0.5C here. Uppers are fine.

[The Northern Ramper]

btch ass heavy stuff ever so close to our east. Talk about scraping the barrel lol. Looks like the Pennines are blocking it out :S

Infact I'm quite annoyed to see I've ended up in the middle two heavy heavy blobs to the West and to the East! I'd have to say, that's an Oreographic looking shadow.

What time is that from?

Heavy here currently and that green is not far away.

[wysiwyg]

The snow has got a little heavier recently, if it carries on like this for a couple of hours it should stick to all surfaces

If the ground temp is at 0C it then the wet surfaces would turn to ice, helping the snow stick more readily.

You'll also need to factor in any surfaces that have been gritted (salted) as this will need 7-8 degrees lower to freeze (i.e. -8 to -10C) will take much longer for snow to accumulate here at the current levels. Heavier falls will settle more quickly on gritted surfaces though.

[HotCuppa]

Temp 0.6C DP 0.5C here. Uppers are fine.

temps are still a little on the marginal side, but should come down later..i hope

Edited January 21, 2013 by HotCuppa

[Snowmad79]

What time is that from?

Heavy here currently and that green is not far away.

Thats the latest image from NW premium.

[HotCuppa]

BT my dp is actually -0.8C but its neither here nor there in the grand scheme of things right now

[Backtrack]

temps are still a little on the marginal side, but should come down later..i hope

Heavier echoes are to our west, annoyingly!

[Stratocumulus perlucidus]

Hc im off to bed now what do you think will happen overnight. Will it just be light to moderate or on the heavier side

[Storm Animal]

Just watched BBC news 24 forecast, said possibly more snow tomorrow night moving into NW from Wales.....and that heavy stuff is so close nr Huddersfield area which is just over the hill from here

[HotCuppa]

can see the mersey pepping it all up, but its heading nw away from us....bad

[ibanez]

can see the mersey pepping it all up, but its heading nw away from us....bad

😃

[Brass_Monkeys]

You'll also need to factor in any surfaces that have been gritted (salted) as this will need 7-8 degrees lower to freeze (i.e. -8 to -10C) will take much longer for snow to accumulate here at the current levels. Heavier falls will settle more quickly on gritted surfaces though.

I agree, my reply was quite vague and by all surfaces I was meaning footpaths, grass etc, not gritted roads

[HotCuppa]

Hc im off to bed now what do you think will happen overnight. Will it just be light to moderate or on the heavier side

maybe a couple of cm, say 2/5cm , its hard to say, but there is a lot of precip on the west side of the pennines towards us, but it looks kinda light.

[The Northern Ramper]

Some heavy stuff intensifying over the pennines on 00:45 radar shot...oh boy!!

[HotCuppa]

Heavier echoes are to our west, annoyingly!

have you see whats heading directly west towards us on the radar, and its just pepping up all the time 0.o

Edited January 21, 2013 by HotCuppa

[SparkleS]

Well its been a steady snowfall herefor the last couple of hours, quite heavy too, easily couple of inches now on pavements and about an inch road cover, cars covered in it, grass almost white now, still coming down heavy. No wind at all now, very quiet out there and sky looks full of it.