Cold Spell Discussion (Ireland): Cold/Frosty/Icy with Snow for some

pistolpetes11

Spindle wrote: »

Just to bring home the point about what you are seeing is not Streamers, have a look at the SST of the M2 bouy, it is currently at 9.2c for any streamers (sea/lake effect snow) you need a temp difference of around 13c between the 850hPa temps and the SST there are only -4 to -6 uppers around at the moment nothing near what you need for good sea effect snow.

What you are getting now is what associated with the low system. This is not a 2010 type snowfall.

going on your figures you should have a difference of 13.2 - 15.2 difference

lucernarian

icesnowfrost wrote: »

Feckin rain all night in Drogheda it's not fair but its snowing now but I think it's to wet to stick. Fieldstown is a 10 min drive north of Drogheda and most if it is 140 to 200 meters ASL and its had snow on the ground since yesterday morning.

I made enquiries and it wasn't sticking to the roads anyway earlier this morning. Or at least it was slush, I didn't entirely understand what I was told. The snow was almost sticking to the grass from as early as Saturday evening.

Spindle

premiercad wrote: »

so you think streamers (Lake-effect snow) can't happen in a large area of low pressure like this as it gets a convective boost over the Irish Sea?


this is why this forum is F*"ked i'll leave it to ya...

Not with the uppers that are there at the moment and the SST we have now, there is not enough instability to get good streamers going.

Not saying it can't happen as you can see sea-effect snow in the backend of the low system. Looking at the radar I see no streamers, all the precip is due to the low pressure currently moving over.

Rougies

Getting pretty heavy here now, needs to be even heavier to stick to roads.

Aug23

4 inches of snow here in North Cork. Thaw has started though... Hoping to get more this evening!!

BLIZZARD7

Piddly graupal in ranelagh now- not heavy- sky is very dark but feels like im on the edge of the shower.


Dan

lucernarian

Spindle wrote: »

Not with the uppers that are there at the moment at the SST we have now, there is not enough instability to get good streamers going.

Not saying it can't happen as you can see sea-effect snow in the backend of the low system. Looking at the radar I see no streamers, all the precip is due to the low pressure currently moving over.

As pistolpetes rightly mentioned, the temperature difference is okay and you need to remember that rule of thumb is a sliding scale, lower atmospheric pressure encourages the advection of this moisture. This is why I said that sporadic showers will crop up away from the front itself and away from the front near Limerick. Streamers are a very specific and simple thing, entirely dependent on straightforward convection and sufficient temperature differences over a given distance that the 850 hPa air travels.

paddy ocon

snow coming down good now in citywest

dav3

Handy little real time webcam from Liberty Hall for all the Dubs wanting to watch the weather. It even works on iphones.


http://www.siptu.ie/media/webcam/

Lagoona Blue

A proper belter of a shower in D24 now . really heavy huge flakes

Cantonesque

20 minutes of snow just fallen in Walkinstown ... now turning to sleet as it peters out.

Fairly wet snow so didn't accumulate too much...

123 LC

been waiting since november for it to snow. snow finally decides to fall where I live, and loads sticking!

yet here i am in college. where there's no snow. just rain.

Spindle

pistolpetes11 wrote: »

going on your figures you should have a difference of 13.2 - 15.2 difference

Did the maths wrong, but you are still on the boundary for getting any instability going.

seamus

Very much brightening up now in Dublin City centre, wouldn't be surprised if we saw clear skies today.

Looks like there might be a good chunk of ppn en route though from the north, might land in Dublin around 2ish..?

Tom Cruises Left Nut

Proper snow in Eastpoint

Macy0161

Snowing quite hard at the moment in Baggot Street (12m asl).

Edit - took longer to post than it actually lasted!

Wine Goddess

Lagoona Blue wrote: »

A proper belter of a shower in D24 now . really heavy huge flakes

Yip confirmed slowing slightly now at 1218

dacogawa

Snowing in Dublin 4 (100m from the coast) not sticking cause of the wet but nice big flakes

Devilman40k

Snowing at East point...

Cantonesque

Stopped now in Walkinstown... Now back to budgets for 2016 and 2017 which will be as hard to forecast as sneachta I reckon...

Clear blue skies in Wexford.

Disappointment is a serious underestimate of how I feel.

Will snow from that system up north find its way down this far? Or am I just wishful in my thinking and clutching at straws

MilanPan!c

Just drove through near white out conditions up to the kids school, which is on a bit of a hill here in Rathfarnham.

Lots of kids getting picked up early...

slowed an awful lots since, but no sign of stopping at the mo'

MollyZ

Light snow in Celbridge at the moment

Tabnabs

M2 buoy DP at noon is now +0.7

DOCARCH

Snowing quite heavily again!

0.8c DP 0.3c

Sierra Oscar

Snowing again now in Ballsbridge area.

paddy ocon

still snowing heavy here in citywest

lucernarian

seamus wrote: »

Very much brightening up now in Dublin City centre, wouldn't be surprised if we saw clear skies today.

Looks like there might be a good chunk of ppn en route though from the north, might land in Dublin around 2ish..?

That big chunk won't reach Dublin. There may be some scattered showers over the next couple of hours though. Though some of the "showers" will be from the edge of the front and indeed the circulating motion of the centre of the LP will probably drag bits and pieces down until maybe 4pm, when the wind direction will be coming off the land. Remaining dry in Dublin afterwards.

paddy ocon

paddy ocon wrote: »

still snowing heavy here in citywest

I keep thinking, "I'll update them on Citywest" but you got it... you got it...

Taxedalot

DOCARCH wrote: »

Snowing quite heavily again!

0.8c DP 0.3c

Need it to last for another hour to make up for the thaw that took place earlier!!