Severe Winter Weather, Snow/Ice - Sun 25th Feb (Onwards) ** READ MOD NOTE POST #1 **

YanSno

Snowbiee21 wrote: »

Wondering wether this is a good trend , snow confined to the south?

It's a good trend if you want the cold to hang around but still uncertain gfs having issues dealing with 3 lows

Slydice

Was reminded of Godzilla when I saw the names together

Slydice wrote: »

SleetAndSnow

Snowbiee21 wrote: »

Wondering wether this is a good trend , snow confined to the south?

Well if it keeps going south then no because nowhere would see the snow predicted, where its at now the GFS is predicting the main snow to start at around 75hrs, with it spreading from just past cork city to the rest of the south-east coast and then finishing at around 102hr when it seems that rain starts moving up the country (what I am reading it as anyway!). Still looks to have heavy enough snow from the dublin-galway line on Saturday though! If the low goes further north it has the possibility of bringing warm temps in quicker I think so its 50/50 whats best really. This is totally up to the more advanced chart readers to correct, I am still learning and have learnt a lot this week alone off everybody!

HONKEY TONK

Spanish Eyes

We should get a hotline to the Alps to see how they cope. NOW.

Rougies

Nettle Soup wrote: »

Honestly if there are blizzards on Thursday night, I am going to put on all my trekking gear, goggles and headtorch and just walk around for hours and hours soaking it all in. I will walk for miles!!!

Same (except for all the fancy gear), meet you in Athlone for a few snow cans?

Kermit.de.frog

lawred2 wrote: »

Is the forecast on page 1 still holding valid?

Yes, pretty much.

Brianmeath

Please make a thread that only mods & MT can post in. I am reading everything here from
bread
shorts & toes
parking up the hill or down the hill,
is it all over
Will my flight land or take off
Please please

Franz Von Peppercorn

Will it snow in Omagh?

Casualsingby

GFS snow accumulation charts nothing exceptional. I've seen worse pronged for this winter already with it which didn't materialise it usually over cooks totals as well. Highest total briefly 13cm over the wicklow mountains. I know showers are hit and miss but seems low for a low pressure system sat over Ireland supposedly with continuous snow.

JCX BXC

Franz Von Peppercorn wrote: »

Will it snow in Omagh?

It could, but it could not.
It may, but it may not.
It might, but it mightn't.

SleetAndSnow

Casualsingby wrote: »

GFS snow accumulation charts nothing exceptional. I've seen worse pronged for this winter already with it which didn't materialise it usually over cooks totals as well. Highest total briefly 13cm over the wicklow mountains. I know showers are hit and miss but seems low for a low pressure system sat over Ireland supposedly with continuous snow.

I wouldn't take too much notice of those charts yet. They are iffy at the best of times really as has been said here quite a bit.

Try_harder

So it’s Storm Emma and not Hector.

Thank fook. That DJ would be insufferable

pistolpetes11

Casualsingby wrote: »

GFS snow accumulation charts nothing exceptional. I've seen worse pronged for this winter already with it which didn't materialise it usually over cooks totals as well. Highest total briefly 13cm over the wicklow mountains. I know showers are hit and miss but seems low for a low pressure system sat over Ireland supposedly with continuous snow.

Have a look at the ECM one then :eek:

Obviously this is over period of days of what it thinks will fall !

Lumi

Brianmeath wrote: »

Please make a thread that only mods & MT can post in. I am reading everything here from
bread
shorts & toes
parking up the hill or down the hill,
is it all over
Will my flight land or take off
Please please

This is a general chat thread so a mixed bunch is what you’re going to get.
The technical thread might be more up your street
https://www.boards.ie/vbulletin/showthread.php?t=2057844498

BLIZZARD7

Casualsingby wrote: »

GFS snow accumulation charts nothing exceptional. I've seen worse pronged for this winter already with it which didn't materialise it usually over cooks totals as well. Highest total briefly 13cm over the wicklow mountains. I know showers are hit and miss but seems low for a low pressure system sat over Ireland supposedly with continuous snow.

There will be more than this in some eastern areas before the low even arrives. This is nothing like anything else seen this winter.

irishfeen

Rush hour tomorrow looks like chaos in Dublin!

tiegan

I'm ready - bring it on!!

Casualsingby

pistolpetes11 wrote: »

Have a look at the ECM one then :eek:

Obviously this is over period of days of what it thinks will fall !

That's more promising. I've also seen ECM Snow depth totals grossly over estimate this winter several times too lol. But parts of leinster will see more from the showers than the GFS indicates IMO

Rougies

irishfeen wrote: »

Rush hour tomorrow looks like chaos in Dublin!

That chart shows 1mm of precip (1-2cm of snow) over 3 hours. Probably enough to chaos actually.

sdanseo

Brianmeath wrote: »

Please make a thread that only mods & MT can post in. I am reading everything here from
bread
shorts & toes
parking up the hill or down the hill,
is it all over
Will my flight land or take off
Please please

MT's daily forecast: https://www.boards.ie/vbulletin/showthread.php?t=2055579971

Technical discussion only (not just mods, but anyone willing to discuss at a model interpretation level with no 67-post debates about the panic buying of Hovis Granary half-pans) : https://www.boards.ie/vbulletin/showthread.php?t=2057844498

emo72

im confused ta feck. do we want the low on friday to go south or north for maximum snow? or is it maximum snow with instant defrost? following attently, but still lost. probably cos im just a little stupid.

fritzelly

What level of snowfall designates a Red alert?
Can't really believe maybe 2-3 inches as predicted Tuesday/Wednesday is worthy of an Amber alert (not including any blizzard conditions)

Nettle Soup

Do large lakes like Corrib, Ree & Derg act as snow shields for snow or enhance it?

SleetAndSnow

fritzelly wrote: »

What level of snowfall designates a Red alert?
Can't really believe maybe 2-3 inches as predicted Tuesday/Wednesday is worthy of an Amber alert (not including any blizzard conditions)

Weather Element Criteria for Red - Severe Weather Warnings

1. Wind Mean Speeds in excess of 80 km/h
Gusts Speeds in excess of 130 km/h
2. Rain 70mm or greater in 24 hrs
50mm or greater in 12 hrs
40mm or greater in 6 hrs
3. Snow/Ice Significant falls of snow likely to cause accumulations of 8 cm or greater below 250 m AMSL. Slippery paths and roads due to accumulation of ice on untreated surfaces; situation likely to worsen.
4. Low Temperatures Minima of minus 10C or lower expected. Maxima of minus 2C or lower expected.
5. Fog No Criterion – not displayed.
6. High Temperature As Orange criterion, but persisting for two or more consecutive nights.
7. Thunderstorms No Criterion – not displayed.
8. Coastal Wind Warnings Violent Storm Force 11 or greater. (Mean Speeds)



Weather Element Criteria for Orange – Weather Warnings

1. Wind Mean Speeds between 65 and 80 km/h
Gusts between 110 and 130 km/h
2. Rain 50mm – 70mm in 24 hrs
40mm – 50mm in 12 hrs
30mm – 40mm in 6 hrs
3. Snow/Ice Significant falls of snow likely to cause accumulations of 3 cm or greater below 250m AMSL. Slippery paths and roads due to accumulation of ice on untreated surfaces; situation stable.
4. Low Temperatures Minima of minus 5C to minus 9C expected. Maxima of 0C or minus 1C expected.
5. Fog Dense fog likely to cause a widespread and significant driving hazard on national primary routes.
6. High Temperature Maxima in excess of 30C or minima in excess of 20C expected in a 24hr period
7. Thunderstorms Widespread thundery activity over an area of several counties.
8. Coastal Wind Warnings Storm Force 10. (Mean Speeds)


Weather Element Criteria for Yellow – Weather Alerts

1. Wind Mean Speeds between 50 and 65 km/h
Gusts between 90 and 110 km/h
2. Rain 30mm – 50mm in 24 hrs
25mm – 40mm in 12 hrs
20mm – 30mm in 6 hrs
3. Snow/Ice Scattered snow showers giving accumulations of less than 3 cm below 250m AMSL. Slippery paths and roads due to accumulation of ice on untreated surfaces; situation improving.
4. Low Temperatures Minima of minus 3C or minus 4C expected. Maxima of plus 1C or plus 2C expected.
5. Fog No Criterion.
6. High Temperature Maxima in excess of 27C expected
7. Thunderstorms No Criterion.
8. Coastal Wind Warnings Gale Force 8 or Strong Gale Force 9. (Mean Speeds)

JCX BXC

Nettle Soup wrote: »

Do large lakes like Corrib, Ree & Derg act as snow shields for snow or enhance it?

Should enhance it, but the effect won't be that great.

Meteorite58

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pistolpetes11

fritzelly wrote: »

What level of snowfall designates a Red alert?
Can't really believe maybe 2-3 inches as predicted Tuesday/Wednesday is worthy of an Amber alert (not including any blizzard conditions)

Its on their Website :

https://www.met.ie/nationalwarnings/warnings-explained.asp

sdanseo

fritzelly wrote: »

What level of snowfall designates a Red alert?
Can't really believe maybe 2-3 inches as predicted Tuesday/Wednesday is worthy of an Amber alert (not including any blizzard conditions)

More than 8cm below 250m ASL with predicted worsening
or Temperatures below -2 maximum, or -10 minimum.

Casualsingby

fritzelly wrote: »

What level of snowfall designates a Red alert?
Can't really believe maybe 2-3 inches as predicted Tuesday/Wednesday is worthy of an Amber alert (not including any blizzard conditions)

Significant falls of snow likely to cause accumulations of 8 cm or greater below 250 m AMSL. Slippery paths and roads due to accumulation of ice on untreated surfaces; situation likely to worsen.

Although they don't follow the below the 250m rule, more what is expected at sea level . They would have issued about 10 this winter if they did follow the below 250m. Mountainyman is around that altitude.