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Cold Spell - Snow & Ice Possible Thursday 8th / Friday 9th

Kermit.de.frog

Discussion thread for potential bitterly cold weather from Sunday evening.

Potential hazards:

Ice,
Frost,
Snow,
Cold Temperatures

We can only really go to Monday night with much confidence in the smaller details however it will be a much colder week overall, there is no doubt about that.

Daytime maxima temperatures from Monday - Friday 0 - 5 c.

Minima Monday - Friday +1 - -7 c (coldest midweek)

The first real snowfall risk is from Monday evening nationwide as a frontal system tries to come in from the Atlantic. It will meet exceptionally cold air over Ireland and to our east - and - be followed closely by exceptionally cold air to our west.

As the cold air to the west "catches up" and mixes with that to the east the front stalls, occludes and has no further desire to live (:() except go out in a blaze of glory and apocalyptic snow bomb :pac:

Well, not quite...

To illustrate on Monday afternoon (you see here the two cold air masses meeting over Ireland) :

UW96-7.GIF?01-18

There are plenty of charts that have been posted in the model discussion thread here.

https://www.boards.ie/vbulletin/showthread.php?t=2057782713&page=53

The front will stall and weaken but should give some snowfall before dieing out as it heads in to the Irish sea. This could be disruptive for Tuesday morning. Amounts too tricky to call at this stage - if I had to take a punt i'd go with 2 - 5 cm's to low levels for now.

Could yet be more but the midlands and east are most at risk.

There are still some differences between the models on Monday - some offer more extensive snowfall and colder temperatures than others.

*Night time temperatures will be very cold and well below freezing extensively - severe frost and ice and where snow lies temperatures will be even lower again.

We'll keep an eye on the rest of the week.

Sneak peek for Tuesday.

EDM0-120.GIF?01-0

To recap bitterly cold from Sunday evening and for the rest of next week. Extensive frost and ice, snowfall at times, some disruption possible.

Exciting eh?:)

P.S If anyone would like to recommend a structure for these threads please do. It's a lot of information to try to get in to the OP to try and keep as simple as possible for you without doing a thesis:o

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ninebeanrows

Them misty snow grains really do stick readily.

Kermit.de.frog

Weathercheck wrote: »

Them misty snow grains really do stick readily.

They provided the foundation for my locale as they normally do :cool:

pad199207

Well I must say what a surprise. I was ready to give up the ghost on this and it did really look like it was on its last legs.

Winter wonderland here now in Naas with 4cm on the garden wall more on the grass I’d say. Near 3cm on the road.

That type of snow works absolute wonders.

-0.3c

Kermit.de.frog

Heaviest snow of the night now, monster flakes.

lucernarian

Can someone explain what i should be looking at around Derry on the radar? I've been flicking through the 18z runs, compared to earlier ones, and it seems the "warm" wedge covering most of the country is a little healthier than expected. Nothing new there...

But why is that new burgeoning trough showing as sleet/rain instead of snow on Meteociel...

sryanbruen

Kermit.de.frog wrote: »

Heaviest snow of the night now, monster flakes.

Hope you're not lying, they've become light now here.

I really should be going asleep but I'm having too much fun watching the white gold fall here

Mr Bumble

Same

ninebeanrows

lucernarian wrote: »

Can someone explain what i should be looking at around Derry on the radar? I've been flicking through the 18z runs, compared to earlier ones, and it seems the "warm" wedge covering most of the country is a little healthier than expected. Nothing new there...

But why is that new burgeoning trough showing as sleet/rain instead of snow on Meteociel...

I have not examined closely but i reckon one could have drawn two fronts

The front over Ulster demarcates the cold atlantic pm air from the warmish sector...

See the 850hPa temps here....but i have not analysed this closely

hirlamuk-16-6-0.png?05-22

Mr Bumble

As in same as Kermit...dinner plates. Quite intense something showing up on North coast east of Foyle on radar...??/

Kermit.de.frog

Flakes are like dinner plates, everything going white.

weatherfiend

Still going in Sandyford below 3 rock. Icy snow even though temp says 1.1c. Sorry for video being a bit grainy

ninebeanrows

Misty snow grains replaced by Mod snow now full flakes.

weatherfiend

Still going in Sandyford below 3 rock. Icy snow even though temp says 1.1c. Sorry for video being a bit grainy

BLIZZARD7

Weathercheck wrote: »

Misty snow grains replaced by Mod snow now full flakes.

Exact same just happened here.

0.5C.

pad199207

Have we got the second front pepping up now over The Shannon?

Gremlin

Looking at the radar, the idea of the second front is really shaping up. It is clearly intensifying and extending southwards.

weatherfiend

Still going in Sandyford below 3 rock. Icy snow even though temp says 1.1c. Sorry for video being a bit grainy

pauldry

Its shot up to 3c in Sligo now from 0.6c earlier. I thought these were cold fronts

weatherfiend

Still going in Sandyford below 3 rock. Icy snow even though temp says 1.1c. Can’t upload video because it’s too big

sryanbruen

Ok, you weren't lying oh my god.

Definitely best snowfall since 2010!!

Charles Babbage

What's the story with the traffic cameras? TII cameras do not load, most of the TrafficwatchNI cams show daylight. Is it just me?

pad199207

sryanbruen wrote: »

Ok, you weren't lying oh my god.

Definitely best snowfall since 2010!!

I told yee I would send it on

patneve2

Moderate snow verging on heavy.

pistolpetes11

What ever is falling now seems to be like drizzle , I'm hearing the slow drip in the drains and just went out for a look , its defiantly taking away some of the coverage I had ,

Strange at 0.0 and -1.7dp , must check wet bulb now (-0.3)

Not sure how to explain it , hopefully the temp keeps dropping to keep my snow intact for the morning :pac:

John.Icy

Kermit.de.frog wrote: »

Flakes are like dinner plates, everything going white.

Sorry to pester but an approx closer location in Santry are you? I'd imagine we're a short walk but here I'm seeing nothing of the likes. Decent on cars and grass but ground still soaking!

lucernarian

Weathercheck wrote: »

I have not examined closely but i reckon one could have drawn two fronts

The front over Ulster demarcates the cold atlantic pm air from the warmish sector...

See the 850hPa temps here....but i have not analysed this close

A cold occlusion of sorts? Looking at the infrared satellite seems to hint at that also. I still don't think it's going to change much except in NI.

Seems to be dying off a bit in Dublin now. 2.5cm on cars and some of the roads have notions of getting a dusting.

BLIZZARD7

patneve2 wrote: »

Moderate snow verging on heavy.

Same here, you've a good bit more on the way- I reckon you might get your inch.

snowstorm445

Roofs and cars finally going white in Ringsend, coming down nicely although probably not for much longer.

Gaoth Laidir

pistolpetes11 wrote: »

What ever is falling now seems to be like drizzle , I'm hearing the slow drip in the drains and just went out for a luck , its defiantly taking away some of the coverage I had ,

Strange at 0.0 and -1.7dp , must check wet bulb now (-0.3)

Not sure how to explain it , hopefully he temp keeps dropping to keep my snow intact for the morning :pac:

The same here. Tiny wet drops of something like drizzle falling and the covering is pretty wet now.

Kermit.de.frog

John.Icy wrote: »

Sorry to pester but an approx closer location in Santry are you? I'd imagine we're a short walk but here I'm seeing nothing of the likes. Decent on cars and grass but ground still soaking!

Closer to the Whitehall end.

Still going moderately here and still some decent sized flakes. Hoping we can avoid a thaw.