Snow and Ice Warning : Saturday(PM)/Sunday 9th/10th December - SEE MOD NOTE POST #1

davidsr20 · 10-12-2017 10:19pm

Nice covering this morning in craughwell but by far the best iv seen on my drive today was loughrea to ballinasloe on the old dublin road it was fairly extream council out plowing the roads and near 2 foot high in the edges and middle after they were done. Around kilreekil was the worst 2010 material.

Oscar Bravo · 10-12-2017 10:20pm

9pm.... its getting cold

Mount Dillon -4
Markree -4
Ballyhaise -3
Athenry -3
Claremorris -2

James Bond Junior · 10-12-2017 10:28pm

Hovering around -1.7/-1.8 in Limerick city at the moment. I was down in Kerry for the weekend and was very disapointed to return to a snow free Limerick.

GoneHome · 10-12-2017 10:36pm

[QUOTE= I was down in Kerry for the weekend and was very disapointed to return to a snow free Limerick.[/QUOTE]

Same as that, I came back from Kerry this evening snow free but definitely much colder here in North Cork/South Limerick.

elvis99 · 10-12-2017 10:37pm

Few from today, just south of Finny (other-side of the lake in photo), Galway/Mayo border.

The depth measurement of just over 6 inches was at 78m asl.

Easily one of the best events here since December 2000 Polar low event. Have to commend the performance of the HIRLAM and various short range models. I was initially very sceptical of the forecast amounts.

TomOnBoard · 10-12-2017 10:38pm

Can anyone explain what exactly is the temperature that is quoted in all these reports. Is it air temperature right on the ground, 2 metres above the ground or something else. Or is it the temp of the ground itself, or something else entirely?

I just went out with my Chinese temperature gun thing (with the IR/red laser built in) and found the following readings:

The ground itself: -7
A metal stand for a patio brolly: -11
An empty gas cylinder: -9
Ice on the top of a bucket of water: -10

Accuweather is showing my location as being at -2.

Confused!

irishrover99 · 10-12-2017 10:41pm

A lot of disappointed dubs on here today. I live in rathfarnham so I went up to ticknock with the kids and their was plenty of snow up there at the first car park about 200m. Drove the car as far as the snow line and then walked the rest. The kids had a great time and when they started feeling cold we left.
Off work tomorrow using my last holiday of the year so might pop up again while the kids are in school.
It was actually nice getting to the snow but not having it in your garden and walking the slush into your house anytime you pop out.
Enjoying a nice Rioja from Lidl now after the kids went to bed shattered.

Oscar Bravo · 10-12-2017 10:45pm

Met hourly reports are air temperature ,At automatic stations and at the airports temperatures are measured by means of platinum resistance thermometer, at other locations the temperature is read by means of a mercury-filled thermometer

Pangea · 10-12-2017 10:46pm

Currently -2 and drizzling rain in SW Donegal, typical.

Oscar Bravo · 10-12-2017 10:47pm

Pangea wrote: »

Currently -2 and drizzling rain in SW Donegal, typical.

now thats annoying to be fair

Gaoth Laidir · 10-12-2017 10:47pm

TomOnBoard wrote: »

Can anyone explain what exactly is the temperature that is quoted in all these reports. Is it air temperature right on the ground, 2 metres above the ground or something else. Or is it the temp of the ground itself, or something else entirely?

It's the air temperature at 1.5 metres above a grassy surface. On nights like this the ground temperature will be a lot lower

TomOnBoard · 10-12-2017 10:50pm

Gaoth Laidir wrote: »

TomOnBoard wrote: »

Can anyone explain what exactly is the temperature that is quoted in all these reports. Is it air temperature right on the ground, 2 metres above the ground or something else. Or is it the temp of the ground itself, or something else entirely?

It's the air temperature at 1.5 metres above a grassy surface. On nights like this the ground temperature will be a lot lower

So the readings I got outside make some sense?

flaneur · 10-12-2017 10:54pm

The M8 from about the Cashel Services to Cork is absolutely fine. The temperature rises from 0°C to +2°C in Cork.

There's serious risk of ice on the M7 through from Kildare to the M8 exit and on the M8 until about Tipperary.

The surfaces are well treated but the small roads, including into some of the services have compacted, refrozen snow.

There's also frozen compacted snow lying in some of the toll lanes (notably the express lane (which is closed))on the M7 beyond Portlaoise. Be very careful approaching them.

I had a few absolute muppets tailgating and also overtaking without fully entering the fast lane because they thought there was ice in it! I had a car one overtake me and then swirve right in on top of me!

I was driving through and conditions in NI today too and similarly ridiculous behaviour.

A small % of people really need a LOT more cop on!

Grandeeod · 10-12-2017 10:55pm

Woke up to a lovely dumping of snow this morning on the Laois/Kilkenny border. It started to change from rain to snow around 5am. Lots of unprepared folks around me this morning, which I always fail to comprehend. Some funny sights.:D A slight thaw towards lunchtime, but once the sun started to go down so did the temps and the slushy sound from cars turned to a crunch and now crackle. Local schools have already texted to say they are shut tomorrow.

Whether it's snow/slush or a wet road these low temps will obviously bring crappy conditions in the morning. A nice snow treat though.:D My only gripe would be the way some stupid people drive in conditions like today. I watched drivers from my living room window drive at stupid speeds in an attempt to get through snow and still get stuck. Saw a poor cat get splattered by a driver that lost control. Personally I took the advice from ME and this forum. In all day. Warm and safe. Best of luck to all in the snow zone that's turning into the ice zone. Just be carefull.;)

yorlum11 · 10-12-2017 10:59pm

You can see those showers clearly here. Up tp 11pm.

prosaic · 10-12-2017 11:00pm

TomOnBoard wrote: »

Can anyone explain what exactly is the temperature that is quoted in all these reports. Is it air temperature right on the ground, 2 metres above the ground or something else. Or is it the temp of the ground itself, or something else entirely?

I just went out with my Chinese temperature gun thing (with the IR/red laser built in) and found the following readings:

The ground itself: -7
A metal stand for a patio brolly: -11
An empty gas cylinder: -9
Ice on the top of a bucket of water: -10

Accuweather is showing my location as being at -2.

Confused!

The ground is going to be emitting heat, so that's warmer.
The sky will be like having a very very cold freezer overhead: Infrared radiation from obects go up into the sky but very little infrared radiation comes back down so the net effect is cooling. If you have something isolated from surrounding, e.g sitting in a hollowed styrofoam container, open to the sky, it will get very cold.
You can add a few more variables into the mix: how reflective the surface is in the infrared, orientation to the sky/ground/surroundings, humidity in the air, other conduction, convection paths for heat.
Do a few experiments. It's fun.
Turn your thermometer to the sky. It might read -50 or something.

JCX BXC · 10-12-2017 11:01pm

Temperature had gotten down as far as -1.7c here in West Clare, however has risen now as high as -1.0c. Looks like a thaw could set in before morning?

Villain · 10-12-2017 11:03pm

Hoping I might get to see some more drifts tomorrow but getting around could be tricky.

Some more like this would be nice

https://twitter.com/carlowweather/status/939863505662021632

boxer.fan · 10-12-2017 11:09pm

Pangea wrote: »

Currently -2 and drizzling rain in SW Donegal, typical.

Snowing nicely here in Northwest Donegal right now ðŸ˜

Gaoth Laidir · 10-12-2017 11:11pm

TomOnBoard wrote: »

So the readings I got outside make some sense?

Yes, things like a metal pole, bucket, car roof, etc., will radiate out heat very quickly in the form of longwave radiation on a clear night, with no cloud and low water vapour to radiate this heat back.

Air is not a good conductor, so while the air close to these objects does cool eventually, air further away (e.g. 1.5 m away from the cold ground) takes a lot longer to cool.

Take a look at tomorrow morning's grass minimum temperature reports. They will most likely be 5-10 degrees less than the minimum 1.5-metre air temperature.

Pangea · 10-12-2017 11:12pm

Oscar Bravo wrote: »

now thats annoying to be fair

Starting to change to wet snow now, the rain has frozen on the ground, lethal driving conditions..

Gaoth Laidir · 10-12-2017 11:18pm

-7 at Belfast Aldergrove now.

dfx- · 10-12-2017 11:23pm

sryanbruen wrote: »

Looks like Monday night will be another severely cold night for the UK, -12c for a second consecutive night. Been a long while with minimums as low as that for a consecutive period.

https://twitter.com/bbcweather/status/939959205263478784

It's hovering around 0c in UK midlands for hours, warmer than a lot of places recently quoted and it just hasn't stopped snowing all day, sometimes at different intensity.

Some amount of disruption tomorrow I'd say.

Dank Janniels · 10-12-2017 11:27pm

I can feel a draught in my room, think from the corner of 1 of the windows! Baltic!!

lolie · 10-12-2017 11:29pm

The BBC forecast earlier showed plenty of showers moving down later in the night but mostly falling as rain though.
Unless the temperatures rise the roads could be lethal if it falls on to frozen ground.

nagdefy · 10-12-2017 11:29pm

Funny how all the Met Eireann bashers who were on here when it was raining heavily between 10pm and 1am last night disappeared today.. Melted away much more quickly than the snow:p

Some ridiculous bashing on here last night.

giveitholly · 10-12-2017 11:30pm

nagdefy wrote: »

Funny how all the Met Eireann bashers who were on here when it was raining heavily between 10pm and 1am last night disappeared today.. Melted away much more quickly than the snow:p

Some ridiculous bashing on here last night.

Exactly well said

Pretzill · 10-12-2017 11:31pm

5 below and freezing out there.

S.Sligo
90m asl

jimbobaloobob · 10-12-2017 11:33pm

Is it likely that this type of event could be typical this winter?

Soccarboy11 · 10-12-2017 11:38pm

-1°c here in Cork. Frost on the grass and just starting to form on the roofs of the cars, only a thin layer though so musnt have been below freezing for long.

Snow and Ice Warning : Saturday(PM)/Sunday 9th/10th December - SEE MOD NOTE POST #1

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