Autumn 2024 - General Discussion

Artane2002

https://www.boards.ie/discussion/comment/122647187#Comment_122647187

I was here for all of July and it definitely wasn't like this for me. While it was a dull month, most days had some bright or sunny spells, we didn't go more than two days without sunshine. You are correct in saying that a lot of the time, the cloudy weather was during the core part of the day, I wasn't up early in the morning but there were a fair few bright evenings following cloudy days. The data you've provided has some missing data, particularly around the 20th-26th. Other things that stand out about the current spell are the very low light levels and how the cloud is completely unbroken, neither of these were factors in July.

.Donegal.

Locally an air frost is possible tonight for the midlands and north.
That new feature I mentioned on the met office website has Castlederg 0c tonight, with -4c possible in rare cases. Same for ballyhaise. Clones -1, with -5c possible in rare cases.

The record low for September is -3.5c in Offaly and -3.7c katesbridge. So that’s a crazy pronged possible low even for rare cases.

highdef

https://www.boards.ie/discussion/comment/122639217#Comment_122639217

When you look at that forecast at that high level snapshot level that you posted, the symbol you see is what is being forecast at 13:00, when we are observing Irish Standard Time during the summer months and at 12:00, when we are observing UTC during the winter months.

So in the example below, the high level snapshop level shows cloudy and 11° for Tallaght this Saturday but when you drill down to 3 hourly forecast for the same day, it's shows a clear start to the day with cloud building, then cloudy for the afternoon with cler skies returning later int he evening and into the early night. And lo and behold, the weather symbol at 13:00 shows it as cloudy. The same goes for the temperature. In the example below, the snapshot and 3 hourly are the same for 13:00 but that is not always the case, especially during the summer when the 16:00 temperature is often higher than the 13:00 one, especially when there's high pressure settled weather.

If you think about it, a single weather symbol will very very VERY rarely describe the weather for a whole day in Ireland as our climate is more often than not changeable throughout a given day.

Gonzo

first time i've seen any sort of real sunshine since last Thursday. A decent day here in Meath.

.Donegal.

Forecasts, storm warnings to be more accurate thanks to supercomputer

More accurate weather forecasts and storm predictions will be made by Met Éireann thanks to a new supercomputer, the forecaster has said.

Eoin Sherlock, Head of the Forecasting Division at Met Éireann, said the supercomputer will provide Met Éireann with a higher resolution view of the weather forecast, leading to better forecasting and warnings.

The first supercomputer is called the Aurora, and the second Borealis, he said. The Aurora will produce the forecast, and the Borealis will conduct the research.

Mr Sherlock told RTÉ's News At One: "It will allow us to run our weather model at a higher resolution, so currently it is 2.5 kilometres, and we're moving up to 2 kilometres, so that’s going to give the weather model a better picture of what lies beneath.

"So, we will get a better picture, of let’s say, the Wicklow mountains or the Cork and Kerry mountains."

He said it will help Met Éireann forecast how the weather front will interact with those features. The forecaster hopes the new system will be particularly useful for forecasting storms.

Mr Sherlock said the computer will allow them to run the forecast model every hour, rather than every three hours.

He said: "So, that means every hour, we are going to have a new forecast of where the model is.

"We’re going to be able to track the model, because every hour, we’re going to be putting our observations in satellites, weather bias etc., into the system, and that is going to give us a better position of where the storm track is."

He explained that calculations are made by determining levels in the atmosphere. The advancement, he said, will move them from 65 to 90 levels.

Mr Sherlock said this will provide a better idea of what the weather is doing, for example, he said it will show "where the thunderstorms are going to develop, at what temperature, what height we can expect thunderstorms to kick off...what does the storm look like."

The supercomputer is based underground for security reasons and, for example, protection against earthquakes, he said.

He added that the infrastructure is already in place and it will be run by hydrapower and geothermal energy.

Robwindstorm

https://www.boards.ie/discussion/comment/122649626#Comment_122649626

Fair play Donegal for keeping us informed. I heard about that a few months back but hadn't heard anything since.

Dazler97

https://www.boards.ie/discussion/comment/122649237#Comment_122649237

How can you see that new feature 🤔 I've the app

wazzzledazzle

Chilly afternoon after a couple of hot weeks away, although Tenerife had a huge storm on my second last day. Weather over the next 24 hours looks to be ehhhh rather wet in N Kildare

Thunder87

https://www.boards.ie/discussion/comment/122647671#Comment_122647671

I don't think there's any missing data there, we genuinely did have less than 5 hours of sunshine that whole week!

Turned into a lovely day today at least, a lot cooler than last time we saw the sun but out of the wind it still feels pleasantly warm

beggars_bush

Much nicer day today than forecast

Was pleasant in the sun away from breeze

mrsnrub2.0

A wet two days ahead for Dublin.

highdef

Considering the weather that is due in a few hours, it's unexpectedly cold and calm in Trim, Meath. There was thick fog until recently, it's lifted to hazy sunshine but there's still some very low cloud over the town, so much so that the top of the church spire is shrouded in cloud. Apologies for the poor quality photo, my phone camera has no optical zoom.

adocholiday

That band of rain coming up from the South looks an awful lot heavier on the radar than what was forecast. Looks like 2 pretty wet days ahead, particularly for the east.

yagan

And boom, autumn is really here. Very damp and will probably use the heating tonight for the first time since May I think.

Cork harbour.

sryanbruen

Some low maxima expected across Ireland for the time of year in next few days. No records but sub 10C maxima in September here is uncommon. The only time I've had a daily max under 10C in Sep in my lifetime so far was 24th September 2012 under the remnants of Nadine.

During the exceptional cold September of 1952, Mullingar had a daily max of just 7.9C. I do not know which day this was but reanalysis suggests it could have been the 28th. Now that is GRIM. Sub 10C maxima have occurred at synoptic stations in 14% of Septembers since 1942.

OldRio

2C in rural Leitrim this morning. Sun at the moment but a cool wind

JCX BXC

Baltic today In Galway City. Dry though!

pauldry

ZERO celscius in Sligo last night in Markree.12 or 13c today though that's still only a day average of 6.5c . 6 degrees below average.

gilly1910

https://www.boards.ie/discussion/comment/122652025#Comment_122652025

Yeah it's pretty damn miserable here in Dublin, already dreading the cycle home, as I will be like a drowned rat by the time I get home.

JCX BXC

https://www.boards.ie/discussion/comment/122653143#Comment_122653143

Halfway between the min and the max wouldn't be the most accurate way to find the average.

JCX BXC

You'd wonder what this would be looking like if it was the end of January as opposed to now.

Billcarson

https://www.boards.ie/discussion/comment/122653506#Comment_122653506

I suppose knock off 2 or 3 degrees per month until the end of Jan , which would mean probably around 10c or colder then now if we were to get a similar set up then.

Dazler97

The met eirrean super computer is based in Iceland, it covers 4 countries, Iceland, Ireland, Netherlands and the other I've forgotten, weather Warning could be issued they said in the next 24 to 48 hours, they just covered all this on the today show

Gonzo

https://www.boards.ie/discussion/comment/122653667#Comment_122653667

the other country it covers has to be the UK if it covers Iceland, Ireland and the Netherlands. The Irish, UK and Dutch met offices work together at times.

.Donegal.

It’s Denmark.

The United Weather Centres West collaboration has created a new weather model with two forecasting domains, covering the four countries’ areas of interest. Red area shows the Iceland and Greenland domain, blue area shows the Ireland, Denmark, Iceland, and the Netherlands domain.

The new model domain extensively covers an area from East Greenland to southern Italy, dividing the geographical area in squares of 2km in size, an improvement compared to the previous 2.5km grid of the previous model version Met Éireann operated. The model represents the atmosphere vertically in the form of 90 levels, a substantial increase from the 65 levels of the previous operational model. These are resolution improvements which translate into better representation of the meteorological parameters across the domain.

The new model is running every hour, while the previous computing capabilities allowed to run it every three hours.

Oscar Bravo

Status Yellow Rain Warning issued⚠️

Valid: 12:00 to 20:00 Thursday 26/9

Location: Dublin & Wicklow

Potential impacts:
• Spot flooding
•Traffic delays and/or disruption

Dazler97

https://www.boards.ie/discussion/comment/122653736#Comment_122653736

Thank you 😊 I couldn't remember the other country and I had just heard it , early dementia at 27 I think

Dazler97

Well I know Ireland, UK and Dutch met service has our storm naming system, where as Portugal, Spain and France have their own list

.Donegal.

https://www.boards.ie/discussion/comment/122650095#Comment_122650095

On the website, search a specific location forecast. Then It’s directly below the 7 day outlook and above the hourly forecast for that location. Has beta beside it.

.Donegal.

Yellow - Rain Warning for Antrim, Armagh, Down

Eastern counties will see the largest rainfall amounts, especially across Co Down and Co Antrim, where 30 to 50 mm is likely quite widely, and perhaps as much as 60 to 80 mm across high ground such as the Mournes.