Turning cold with Frost/ Ice and some Snow (Thursday night/ Friday/ Saturday)

ninebeanrows

Winds will continue to be strong tonight particularly in the northeast.

As the evening progresses it will turn notably colder from the northwest with temperatures tumbling to 0-3c overnight.

Most notably dew points will turn lower and remain at 0c or below from around 6pm this evening.

Wintry showers will affect the north and west increasingly turning to snow inland of the coast and on hills.

Towards dawn a organised areas of precipitation will push into the north associated with a shortwave type feature illustrated here to our northwest.



This has the potential to bring more organised snow showers to the northern half of the country towards from early morning to early afternoon.

It is likely some accumulations will take place especially inland and over 100m.

We will use this thread to chat about the impending short cold snap.

dermiek

No good at reading these charts, no matter how detailed.
If this materialises, will the showers affect the North, NW, or more countrywide? Or is it too soon to say?

Harps

The temperature has actually risen again here after consistently dropping all morning, back up to 7.4C again having been at 6.2C an hour ago. Dew point continuing to drop though with RH at only 69%, currently at 2C so it should go below zero at some stage this evening assuming humidity doesn't rise too much

A few squally hail showers but mostly dry so far

Won't be online again until at least 7pm so hopefully things will start to change by then!

Edit: Again just as I post something happens! Very heavy shower of sleet and hail just there, first proper wintry shower and dew point down to 1.2C, not too far to go now!

dermiek

I take it this dew point is somehow related to the chance of snow, yes?

Tom Cruises Left Nut

Sneachta in Scotland

Iancar29

HEAVY RAIN HAIL SHOWER HERE IN N.DUBLIN!!

Pangea

Temp 5.0 Dewpoint 2.0 Just getting very windy now again with heavy hail and sleet.

Strangegravy

dermiek wrote: »

I take it this dew point is somehow related to the chance of snow, yes?

I think the dew point has to be at 0C or below for snow, but there's other factors involved... there always is!

pauldry

cant see where the snow is coming from myself to be honest.

think hailstones will be as wintry as it gets

6c here

munsterlegend

pauldry wrote: »

cant see where the snow is coming from myself to be honest.

think hailstones will be as wintry as it gets

6c here

met eireann has no warning out either even for the very north of the country.

what are they not picking up that Weathercheck and MT are?

Pangea

It was snowing here a while ago

pauldry

really. do you live on top of mount errigal ?

YanSno

am back here after a long time busy with studies.big potential of snow later during the afternoon that low which past us in the north is draging the cold air behind it even the shower could b widespread as the winds will b strong and also the shower wont lose much intensity as it always do,but this time the wind is going to help it,sure its will b am interesting evening.but sorry for the southeast dont think theres will be any snow.be precautious on the roads

WolfeIRE

YanSno wrote: »

am back here after a long time busy with studies.

YanSno formerly known as ...?

YanSno

search Yansnow on boards.ie i was a contributer before

WolfeIRE

Ok:) Just wondering since it was your first post.

Yellow warning out for ice in Northern Ireland for Friday

http://www.metoffice.gov.uk/weather/uk/ni/ni_forecast_warnings.html?from=rss&sn=4E5F3D3C-D29A-7265-8435-1D8A045AAB26_3_NI

Pangea

pauldry wrote: »

really. do you live on top of mount errigal ?

lol no, SW Donegal, there was snow flakes for a brief period but then it was replaced by sleet.

WolfeIRE wrote: »

Yellow warning out for ice in Northern Ireland for Friday

http://www.metoffice.gov.uk/weather/uk/ni/ni_forecast_warnings.html?from=rss&sn=4E5F3D3C-D29A-7265-8435-1D8A045AAB26_3_NI

At the expense of the snow warning I see

YanSno

changed my username.i have been busy wid my studies.ur defo geting some snow tonight in clare.a more organised feature will cross the country in the event into fri morning northern half of the country most as risk

WolfeIRE

YanSno wrote: »

changed my username.i have been busy wid my studies.ur defo geting some snow tonight in clare.a more organised feature will cross the country in the event into fri morning northern half of the country most as risk

No prob Yan. No need to explain. Just thought I might know you from an older username. Welcome back either way.

Not sure about Clare seeing much snow. I agree that showers will be widespread up and down the west coast and in Ulster but not sure the snow will fall below 250 metres or so here. Lower level snowfall more likely in Ulster alright.

Would love if I was wrong. Only saw one flake here last winter. The cat ate it before I got a chance to take a picture even.

snaps

showers turning wintery here in mayo. Some yet snow, sleet mixed in with rain. Trying to look across to conemarra to look at mountains, but they are in the murk.

je55ie

WolfeIRE wrote: »

Only saw one flake here last winter. The cat ate it before I got a chance to take a picture even.

Really , you had no snow in your area last year. Thought everywhere got snow last year. What about the year before that did you have snow?

YanSno

you never know u might see more snow tonight than u saw last winter.temp and due point will drop quite quickly in the next hour or 2

leahyl

je55ie wrote: »

Really , you had no snow in your area last year. Thought everywhere got snow last year. What about the year before that did you have snow?

I think Clare was about the only county that didn't get snow last year - was talking to someone who lives in Ennis yesterday and he was saying that they got no snow there last year.

WolfeIRE

je55ie wrote: »

Really , you had no snow in your area last year. Thought everywhere got snow last year. What about the year before that did you have snow?

No Jessie. I am 450ft above sea level but in the easterly setup it was a case of hit and miss. There was snowfall to may north, west, east and south. Very disappointing. We got a heavy snowfall in January 2010. Nothing since then.

I am on the leeside of a mountain about 11 miles from the coast. We have had plenty of snowfalls in the past but the last two years almost have been disappointing. Blustery wintry showers in a NW setup has often brought snow to these parts through the years but it is a setup I am more accustomed to seeing in February or even March. I think the maritime influence might keep temperatures just that bit too high tonight for us to see any snow in this part of Clare

DEC 3 2010

WolfeIRE

Temp has dropped from 6c to 3.9c in the space of 15 minutes here. A heavy shower passing through. Can anyone explain the sudden temp drop?

Tom Cruises Left Nut

WolfeIRE wrote: »

Temp has dropped from 6c to 3.9c in the space of 15 minutes here. A heavy shower passing through. Can anyone explain the sudden temp drop?

Sure, its got colder

/gets coat

Iancar29

WolfeIRE wrote: »

Temp has dropped from 6c to 3.9c in the space of 15 minutes here. A heavy shower passing through. Can anyone explain the sudden temp drop?

COld front has passed over!


BRrrrrrr!

cherryghost

M4 DP is down to 1.7 now. Getting there!

je55ie

WolfeIRE wrote: »

No Jessie. I am 450ft above sea level but in the easterly setup it was a case of hit and miss. There was snowfall to may north, west, east and south. Very disappointing. We got a heavy snowfall in January 2010. Nothing since then.

I was so lucky to get snow last year so looking at that picture ... lets hope we are all lucky in Jan-Mar this year to get some snow

WolfeIRE

I thought it might have something to do with the shower as opposed to the cold front.

tntn - Make sure it's a warm one

Brianderunner

I really hope we get snow this christmas. So that all the flights will be cancelled, the sport called off, the footpaths and roads too treacherous to leave the house and life in general being made a living misery. Bring it on :rolleyes:

je55ie

Brianderunner wrote: »

I really hope we get snow this christmas. So that all the flights will be cancelled, the sport called off, the footpaths and roads too treacherous to leave the house and life in general being made a living misery. Bring it on :rolleyes:

:rolleyes: :rolleyes:

Trogdor

WolfeIRE wrote: »

I thought it might have something to do with the shower as opposed to the cold front.

tntn - Make sure it's a warm one

Evaporative cooling maybe?
The melting snowflakes/evaporating water need energy to do so and take it from the surrounding air which in turn cools the air around it and allows snow to penetrate lower and lower into the atmosphere as it continues to cool the air around it.

Noopti

Brianderunner wrote: »

I really hope we get snow this christmas. So that all the flights will be cancelled, the sport called off, the footpaths and roads too treacherous to leave the house and life in general being made a living misery. Bring it on :rolleyes:

Go. Away.

WolfeIRE

Thanks Trogdor. After the shower passed it jumped straight back up to 5.7.

Another showers has just came in and it has dropped to 3.8C

Either that or the batters are going in the weather station:)

Pangea

BBC weather said just hill snow for NI tonight, there goes any hope of the white stuff.

Chicken Run

WolfeIRE wrote: »

Would love if I was wrong. Only saw one flake here last winter. The cat ate it before I got a chance to take a picture even.

Hiya Wolfe, fellow Clare snowshield dweller *waves*
Better not flippin snow tonight mind, I've to get to work in Ballinasloe at the sparrowfart in the morning...

Deep Easterly

Brianderunner wrote: »

I really hope we get snow this christmas. So that all the flights will be cancelled, the sport called off, the footpaths and roads too treacherous to leave the house and life in general being made a living misery. Bring it on :rolleyes:

A word of warning Brianderunner, you're in snow bunny territory here, and though they may look cute..

https://www.youtube.com/watch?v=6SofvBkmkEM

They bite!

WolfeIRE

Chicken Run wrote: »

Hiya Wolfe, fellow Clare snowshield dweller *waves*
Better not flippin snow tonight mind, I've to get to work in Ballinasloe at the sparrowfart in the morning...

Hi Chicken Run. Do let us know if you get those snow headaches

WolfeIRE

I still cannot see much snowfall over the next 2-3 days, with the exception of high ground in Ulster and north Connacht. I maintain the best chance of low level snow will be next Tue/Wed in west Munster, Connacht and west Ulster.

Ultimately, we will remain stuck in this mild,cold,mild,cold setp in the run up to Christmas with the south and southeast fairing poorest regarding potential snowfall

WolfeIRE

08 December 2011 16:25

Today Staying very windy and gusty this evening especially in the west and north, with further squally showers which will be heavy at times. Temperatures will start to drop and it will become cold.
Tonight

Winds will gradually moderate tonight and many places will become dry with clear periods. However showers will continue in western and northern parts and some will be wintry on higher ground in the northwest. Indeed some of the showers may penetrate further inland to parts of the midlands and north Leinster. Cold with lowest temperatures of 0 to 3 degrees with ground frost developing and the risk of some icy patches.

Tomorrow

It will be a cold, bright day tomorrow Friday with some sunny spells. Further showers will affect western parts of Connacht and Ulster, and some will be wintry in particular on higher ground. It will be breezy during the morning but winds will moderate in the afternoon, with highest temperatures of 4 to 7 degrees.

homer simpson

Everything has calmed down dramatically here in Donegal in the last half hour or so very little wind and no precipitation of any kind. I thought around now was predicted to be the worst period? Or has the front simply missed us?

TheMilkyPirate

homer_simpson wrote: »

Everything has calmed down dramatically here in Donegal in the last half hour or so very little wind and no precipitation of any kind. I thought around now was predicted to be the worst period? Or has the front simply missed us?

Around now is the worst period in scotland, The worst has passed in the north

pauldry

major disappointment with the storm and associated snow

one big gust in malin. one tree down in sligo. one hailstone in leitrim

all gone now.

even the storms for next week arent as apolcalyptic as yday

bah humbug. noonan probably cut them in the budget though howlin obviously cut the winds:cool:

John.Icy

Sigh...some people ask for waaaay too much out of the weather.

homer simpson

John.Icy wrote: »

Sigh...some people ask for waaaay too much out of the weather.

I think that if you think that your in the wrong forum :pac:

nacho libre

it has gotten fairly gusty here again.

i wasn't holding out much hope for snow despite the promising forecasts earlier in the week, blustery westerly to north westerly winds are not conducive(?) to low level snow fall(bar ulster) from what i've seen over the years.

if the jet stream would do the decent thing and allow these system to plunge southwards, we might be in business with some of these cold snaps that follow the systems..

on a more positive note, i think one of these storms should deliver for much of the country before this period of active weather is over.

thetonynator

Kilkennyweather.com its reporting light snow, 4.2C. Surely a mistake! DP - 0.3

Su Campu

I think we will just about see the snowline to sea-level in any showers in the northern half of Ulster later tomorrow afternoon, with a mix further south. The snowline will rise fairly steeply to around 150 m through central Ireland, provided that any showers make it that far.

850 theta-w values of around 0-1 °C where sea level pressure is around 1000 hPa should make fairly certain that precipitation at sea level willl be predominantly snow. With pressure higher further south, the same value of theta-w will still mean that the snow line will rise, by about 200 m per 10 hPa rise.

850-1000 thickness at around 1290-1295 m is a little higher than the 1285 m max I would like, but evaporative cooling may just offset this enough.



The GFS lies in fairly close agreement, with the "Schneefallgrenze" (snow line) showing a similar pattern tomorrow afternoon.

ongarboy

leahyl wrote: »

I think Clare was about the only county that didn't get snow last year - was talking to someone who lives in Ennis yesterday and he was saying that they got no snow there last year.

Below was taken around Christmas Eve last year. Yes, Clare (and Waterford/South Tipp/Cork coastline) seem to be the only places that show green. Awful if you were a snowlover in those places :mad:

John.Icy

homer_simpson wrote: »

I think that if you think that your in the wrong forum :pac: