The Weather Watcher
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Posts posted by The Weather Watcher
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snizzle here, not lying very well. Didn't think it would be great intensity.
If it could back west about 10-20 miles it'd be good.
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1 minute ago, mountain shadow said:
Too right. Take the back road over the Castlereagh Hills.
Exactly where I was thinking, up forest side way.
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4 minutes ago, mountain shadow said:
I wouldn't have thought precipitation amounts would be of concern on the motorway.
But you never know!
I'm that snow starved I might take the scenic route.
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2 minutes ago, mountain shadow said:
I don't, but the GFS 18z looks a significant upgrade for NE counties.
It does indeed, but I am dubious to the intensity of the precipitation as the area of milder air mixes out. Will make my drive to Lisburn to get the daughter interesting. Particularly dropping her back in the evening should any accumulations occur and freezing.
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Anyone know who runs the NI weather advisory page, they must be a member as they use the charts from netweather?
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Later tonights front further South than yesterday, looks like it only skiffs the border area. Still looks like sleet and snow for Ireland though, atm.
The North coasts continuing to see some showers throughout the day.
According to the Meto, some frequent showers possible for County Down on Sunday, but couldn't see them this far North on the county
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Must be some decent coverings in the NW this morning, looks like showers continued well overnight. Some even getting right to the East. A slight shift in wind direction to NW rather than WNW and stronger winds looks to have helped NE Antrim also get into the mix, and maybe even some Central areas.
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23 minutes ago, Ryan james said:
Hi TWW your prospects on Dublin seeing any of the white gold over night/ tomorrow night
Wouldn't expect anything this night, maybe the odd isolated skiffle of dandruff should any showers make it all the way across.
Tomorrow night is interesting due to a frontal system. An area of milder air associated with it, though not terribly milder. Still 850hpa uppers of -3/-4. Dewpoints upto 2c near the Dublin coast but 0 or less inland. Certainly worth a watch still.
GFS shows the milder sector oushing through 3am to 6am.
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Looks like more organised bands moving into Lietrim, Sligo, Donegal and maybe Derry. Showers becoming more hefty too. Might help them breach further inland before fading.
Fingers crossed for a surprise trough.
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2 minutes ago, bobbarley said:
Reminds me of the good old days when you were our resident expert. Missed your input
I wouldn't say expert But yes, miss my old "The watcher" account. I no longer use or have access to the email address associated with that account and can't remember the password. Otherwise I would prefer it so all the old users recognise it's me lol.
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1 minute ago, Summer Snow said:
Thanks for sharing your knowledge Weather Watcher....very well explained and easy to understand .....it is nice for us weather geeks to learn how these things work....
It's no problem at all. I am a weather geek too. All the information I got was from my interest in meteorology and there's a great learning section on these forums for it. I'm good at explaining it, but not so good at the mathematical side of it. I love maths, but never divulged in anything beyond GCSE maths.
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16 minutes ago, na52 said:
Please feel free to ignore but can I also ask why I can see the smoke from nearby houses ( the surface air ) being blown in the exact opposite way direction of travel than the clouds, is the surface air cold enough to be drawn out to sea even against the prevalling wind ?
Commonly known as a land breeze. Apart from possible surface winds changing direction due to buildings/land interference, it is most likely a land breeze. These do prefer to happen at night as the inland temperature gets colder, plus with the slack NW winds atm it'll not be hindered. The winds increase somewhat later tonight, enough to stop the land breeze from happening.
I might add also that wind divergence can cause unusual surface wind directions, although it is more likely to cause sinking air, fog, etc.
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4 minutes ago, Sperrin said:
Many thanks @The Weather Watcher
No problem.
Apart from the cold air aloft, on this occasion all other forcings are not conducive to good shower activity, so we just have the wishbone kind of effect, with showers only really on windward coasts. What could aid us better is even colder uppers (more upward forcing), small patches of moist and milder air (for trough development) or converging winds.
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11 minutes ago, Sperrin said:
Can anybody explain the physics behind shower activity? Always fascinates me why some showers will push well inland and maintain their intensity, whilst other times (like today) they disintegrate 20-30 miles inland. Some really beefy showers completely fell apart this afternoon within 15 miles of travel.
There are multiple reasons why. Could be less moisture rich air inland, could be surface to troposphere temperature difference, slack air flow/divergence.
In this case the showers are developing due to sea to troposphere temperature difference (moist warmer air will try rising above the colder air aloft). This is larger than the land to troposphere temperature difference, and with less moisture over land, any air that rises is drier (meaning no shower development). With no development, the showers fade.
There is also slack isobars, meaning wind divergence more probable. In summer/thunderstorm potential you will hear of convergence zones. Convergence helps aid convection (and organised storm development), but divergence is the opposite, and aids sinking air.
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Just now, mountain shadow said:
The sun's up now though, so showers will be increasingly sleet and rain away from high ground I think.
And they look to be fizzling out as they hit the Antrim county border.
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3 hours ago, Donegal said:
Markree Castle in Sligo has the lowest temperature ever recorded for this island and it is only 5 miles or so from the coast.
There's not enough weather stations, most are near the coast where its mildest, markree is an exception to the rule. Malin head has a completely different climate to me in inland Donegal beside Tyrone.
All met eireann temperature recording stations in donegal are beside the coast except for one beside Raphoe but its on top on mini hill with low valleys beside it so its never going to be as cold there as the valley on the coldest nights.
Castlederg recorded the coldest temperature in 2010 but it wouldn't surprise if other places in West Ulster got colder there just isn't enough weather stations to record it. NI has better temperature recording coverage than Donegal. I think the 4 stations here are Finner camp, Malin head both coastal. Glenties very near the coast and Raphoe. I remember seeing Kilygordon on the Nra road weather site recording similar temperatures to castlederg throughout 2010 but its not an official site.
I remember reading years ago that a place near omagh recorded -20 decades ago but they couldn't verify it. It was on Wikipedia so make of it what you want ha.
I never knew Markree castle was the coldest recorded. I was there about 15 years ago on a ghost hunt in its Chapel. The grounds on it are amazing.
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No shortage of showers here tonight, but all hail/graupel and just melting. The coldest uppers do seem to come in overnight, but do so as the pressure rises, so expect the showers to become less and less.
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There's been rain/sleet here for an hour (showery), courtesy of a small streamer.
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1 hour ago, Donegal said:
No warm sector to worry about if that happened. Madness
That's the coldest 850's I've ever seen modelled for here.
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Was snowing even down to sea level in Bangor. First main band cleared now, but depending on mild sector, not sure what the showers or second band will fall as.
I drove just 10 minutes away to Craigantlet hills for the initial band and it snowed heavy for around 20 minutes, everything white. It's roughly 150m asl.
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Remember it so well, like it was yesterday. At the end of November I was up on a roof rebuilding a chimney when the first snow showers began to fall in Belfast. By Christmas time there was 1 metre Icicles hanging from the sky dish, snow had been laying for weeks and there was more forecast.
From what I remember it started with a Greenland high then this moved to Scandi, then back and forth like a game of tennis the whole time.
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2 minutes ago, mountain shadow said:
Sure, that's normal for country folk.
Well, I hope he at least keeps it warm. Otherwise the birds will go crazy for it, the avian kind. haha
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Just now, Sperrin said:
Cheers @mountain shadow!!
Doesn't feel cold enough for snow outside at the minute but the blinds will be up this evening. Upside is I might catch some snow falling, downside is neighbour will be accusing me of flashing her (again!!)
Are you lampost watching in the buff?
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I'm on the snow hunt, my partner is in Singapore and wants pictures of any snow. Depending on how things go this evening, might take a drive up to Glenshane pass for early morning, or, if it falls as snow on high ground here (Belfast hills etc) somewhere local. Showers do look to be penetrating inland well and strong at the minute, so who knows. It's been that long since the last snow risk I've near forgotten just how nowcast snowfall can be. It is a marginal event, but do expect some high ground accumulations.
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Ireland Regional Weather Discussion
in Ireland Weather Discussion
Posted
Backing West, could be in Business. Moderate snow now.