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

ebbsy · 10-12-2017 7:13am

Nothing in Monasterevin. Lots of rain earlier on.

the 12 th man · 10-12-2017 7:15am

Nothing in West Wicklow yet.

Danno · 10-12-2017 7:17am

Chucking down snow in South Laois. Grass and car-roofs covered. 0.6c with dewpoints at -0.6c

KingdomRushed · 10-12-2017 7:18am

There may be some more widespread snowfall from this point on than currently but it won’t amount to anything of note. Again prob different story above 200m.

Lucreto · 10-12-2017 7:19am

Nothing in Naas yet.

It's not even raining.

dexter647 · 10-12-2017 7:19am

Went to bed annoyed looking at the puddles of rain but have woke up to heavy snowfall now with a good covering....South west Laois 126m asl:D:D

Danno · 10-12-2017 7:23am

M.T. Cranium wrote: »

The good synoptics for snow don't begin until that first low dives southeast, it will be the second low forecast to track into Clare then southeast to Cork that does most of the business in terms of providing moisture and lift, but as the first low moves past Cork areas to the north of the frontal boundary should see a rapid changeover from sleet or freezing drizzle to snow.

This slow rise in temps around the south and southeast coasts is not surprising and won't be much of a determining factor. The M6 buoy was briefly in the warm sector of this first low and hit 11 C, I would not be surprised if Valentia and Sherkin Island get almost that warm for an hour or two as it slides past (maybe this next hour or two).

The heavier snow will begin after midnight and more likely around 0300h to noon in central counties, then as the system loses access to Atlantic warmth the second low will start to get surrounded by sleet or wet snow so even the south coast could end the event with a coating.

My Dublin forecasts have been quoted here but let's be realistic, this is a very tricky scenario and getting the right elevation for rain-snow boundary is difficult, I had to choose a number so I chose 150m, but it could very well be 100m to 200m.

One variable to watch in later model runs would be the exact track and intensity of the second low (there are even hints of a third low although it's more of a hangback trough). Every millibar we can get this second low to drop will be worth a cm of snow in the snowfall zones.

Spot on and correctly called. A hat tip to you MTC!

DOCARCH · 10-12-2017 7:33am

Very slow downward trend in temps in Dublin 16. 1.5c DP 0.8c atm. Moderate icy/bloby rain. 12.2mm since midnight.

Tom Cruises Left Nut · 10-12-2017 7:33am

Lucreto wrote: »

Nothing in Naas yet.

It's not even raining.

Snowing a bit in Sallins now

DOCARCH · 10-12-2017 7:39am

The icy/bloby rain has now turned to sleet in Dublin 16. G'wan! 1.4c DP 0.7c atm.

barney 20v · 10-12-2017 7:39am

Heavy sticking snow here in west wexford- 126 asl went to bed at 2am to scenes of a flood , woke up to white lawns, roofs on houses, cars etc.

Roads currently clear but it's just started recently and is forecast to snow here ( potentially) until well into the day here. 4 or 5 pm . If it keeps up it will be a notable snow event for us .

fits · 10-12-2017 7:40am

Not a smidgen of it in South carlow. West of the blackstairs

Danno · 10-12-2017 7:40am

Moderate to heavy snow falling. Roads and footpaths covered. 0.4c with dewpoints of -0.5c. Proper frontal snow.

barney 20v · 10-12-2017 7:41am

fits wrote: »

Not a smidgen of it in South carlow. West of the blackstairs

We're on the east side and its snowing heavily

juneg · 10-12-2017 7:42am

Lashing rain in Limerick all night....

United road · 10-12-2017 7:44am

DOCARCH wrote: »

The icy/bloby rain has now turned to sleet in Dublin 16. G'wan! 1.4c DP 0.7c atm.

Same here, very notable flakes in this sleet (south dublin 140m ASL) think Kermit's gut feel from a few posts back might be on to something!!

fits · 10-12-2017 7:45am

barney 20v wrote: »

We're on the east side and its snowing heavily

Whereabouts? I’m in Ballymurphy.

Snowbiee21 · 10-12-2017 7:45am

DOCARCH wrote: »

The icy/bloby rain has now turned to sleet in Dublin 16. G'wan! 1.4c DP 0.7c atm.

As far as we’ll get haha

Edward M · 10-12-2017 7:47am

A covering here in south Cavan so far, not as much as the other night yet, but still snowing lightly.

SpitfireIV · 10-12-2017 7:49am

fits wrote: »

Whereabouts? I’m in Ballymurphy.

Moderate snow falling in Carlow town still, sticking well, good covering down now since around 5am ish (I accidentally fell asleep and missed the transition :-P)

M.T. Cranium · 10-12-2017 7:50am

For Dublin I would expect oscillations in the rain-snow divide elevation, depends on how hard the precip is falling to some extent (to get the snow globules down low enough before they melt). The same will be true in Meath and northeast Kildare. South and west of a pseudo-warm front that will push in from the Irish Sea, all snow and heavy at times. Most likely orientation for that is north Kildare down western slopes or spine of higher ground in Wicklow then curving around to join up with the frontal zone now pushed fairly close to the south coast east of Waterford. In the southwest, it's a case of the second low drifting into the mess and failing to push back hard enough to move the fronts, which will slowly encircle that low with colder air, changing over the precip from rain to sleet then snow by early afternoon.

Would appreciate any ground reports from south central Galway, Athenry has had over 10 mm of liquid equivalent overnight, wondering if that is partly or all snow.

Danno · 10-12-2017 7:52am

M.T. Cranium wrote: »

For Dublin I would expect oscillations in the rain-snow divide elevation, depends on how hard the precip is falling to some extent (to get the snow globules down low enough before they melt). The same will be true in Meath and northeast Kildare. South and west of a pseudo-warm front that will push in from the Irish Sea, all snow and heavy at times. Most likely orientation for that is north Kildare down western slopes or spine of higher ground in Wicklow then curving around to join up with the frontal zone now pushed fairly close to the south coast east of Waterford. In the southwest, it's a case of the second low drifting into the mess and failing to push back hard enough to move the fronts, which will slowly encircle that low with colder air, changing over the precip from rain to sleet then snow by early afternoon.

Would appreciate any ground reports from south central Galway, Athenry has had over 10 mm of liquid equivalent overnight, wondering if that is partly or all snow.

Do you expect precip to re-intensify? If so, where is the firing line?

barney 20v · 10-12-2017 7:52am

fits wrote: »

Whereabouts? I’m in Ballymurphy.

Rathnure so directly across from you as the crow flies

Rock Lesnar · 10-12-2017 7:53am

Rain pounding the roof here, bbc forecast yesterday morning was spot on

Carol25 · 10-12-2017 7:54am

Morning from 2 miles South of Athenry town. Currently,I have heard snow sliding on our roof. Checked outside, there is a light dusting of snow on the ground. Thought it would be heavier with what I saw on our velux windows! There's still time...❄️⛄️