Leinster flooding - 24th October 2011

tunedout

there was a guy in another forum missed his flight because of the weather and he will not be able to get any refund either

HellFireClub

Some major clouds lucking over Dublin South right now, 3 Rock Mountain area...

Iancar29

HellFireClub wrote: »

Some major clouds lucking over Dublin South right now, 3 Rock Mountain area...

Was gonna say the same... weakening though

DOCARCH

You think we had it bad!

Just heard that 9 people were killed when flash floods hit north western Italy overnight after up to 500mm of rain fell in a couple of hours! :eek:

http://www.montrealgazette.com/health/least+killed+Italy+flooding/5609458/story.html

Speak Now

Recorded Rainfall records :eek:

• Most in one minute: 31.2 mm (1.23 in); Unionville, Maryland, United States, 4 July 1956.
• Most in 1 hour: 305 mm (12.0 in) in 42 minutes. Holt, Missouri, United States, 22 June 1947.
• Most in 12 hours: 1,144 mm (45.0 in); Foc-Foc, Réunion, 8 January 1966, during tropical cyclone Denise.
• Most in 24 hours: 1,825 mm (71.9 in); Foc-Foc, Réunion, 7–8 January 1966 during tropical cyclone Denise.
• Most in 48 hours: 2,467 mm (97.1 in); Aurère, Réunion, 8–10 January 1958.
• Most in 72 hours: 3,929 mm (154.7 in); Commerson, Réunion, 24–26 February 2007.
• Most in 96 hours: 4,869 mm (191.7 in); Commerson, Réunion, 24–27 February 2007.
• Most in one year: 26,470 mm (1,042 in); Cherrapunji, India, 1860–1861.
• Highest average annual total: 11,872 mm (467.4 in); Mawsynram, India.

Speak Now

Irish records

The greatest daily total was 243.5 mm (9.59 in); recorded at Cloore lake, County Kerry on 18 September 1993

The greatest monthly total was 790.0 mm (31.10 in); recorded at the Comeragh Mountains, County Waterford in October 1996.

The greatest annual total was 3,964.9 mm (156.10 in); recorded at Ballaghbeena Gap in 1960.

The greatest hourly total was 97 mm (3.82 in); recorded at Orra Beg, County Antrim, August 1980.

patneve2

It would be great if we had data like greatest hourly accumulation of snow, greatest daily accumulation of snow etc. for ireland....if onlyyyy:D

Coles

Jerry Seinfeld wrote: »

The greatest hourly total was 97 mm (3.82 in); recorded at Orra Beg, County Antrim, August 1980.

A sustained 100mm/hour on saturated ground across a 8km² catchment would result in a flood of 220m³/s, more than the average flow of the River Shannon. :eek:

irish1967

When I lived in Boston in the early 90s the rainfall radar was on a tv channel covering the Greater Boston area 24 hours a day. Surely this wouldnt be that hard or costly to set up?
I'm sure adverts at the bottom of the screen would go a good way to funding it. Surely Ireland is up to speed on technology the US has 17 years ago.

tricky D

irish1967 wrote: »

When I lived in Boston in the early 90s the rainfall radar was on a tv channel covering the Greater Boston area 24 hours a day. Surely this wouldnt be that hard or costly to set up?
I'm sure adverts at the bottom of the screen would go a good way to funding it. Surely Ireland is up to speed on technology the US has 17 years ago.

Eh, are you up to speed yourself?? Here in 2011 we do indeed have this technology, funnily enough it's right there on the Met Éireann website - on the homepage, right where you'd expect it. 24/7/365 too, no ads.

http://www.met.ie/

bucketybuck

irish1967 wrote: »

When I lived in Boston in the early 90s the rainfall radar was on a tv channel covering the Greater Boston area 24 hours a day. Surely this wouldnt be that hard or costly to set up?
I'm sure adverts at the bottom of the screen would go a good way to funding it. Surely Ireland is up to speed on technology the US has 17 years ago.

But why? These are events that happen once every twenty/thirty years? They are a pain yes, but do we really need 24hr rain watch? Really?

Ghost Train

bucketybuck wrote: »

But why? These are events that happen once every twenty/thirty years? They are a pain yes, but do we really need 24hr rain watch? Really?

Su Campu

A total of 68.15 billion litres of rain fell on Dublin County on Monday. That's 53.6 TONNES per person!

Area = 921 km². Population 1.271 million. Average rain 74 mm (Casement, Dublin Airport, Phoenix park, Dun Laoghaire Harbour)'

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

gbee

Su Campu wrote: »

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

That's why we do need 15minute weather reports and updates and life threatening warnings in times of severe weather.

Dublin was hit by a severe weather event ~ all broadcasts should have been interrupted with severity alerts.

Rougies

Su Campu wrote: »

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

Another way of putting it is that if you filled it all into standard 500ml bottles of water and placed them end to end, they would go around the earth's equator 25 times!
And those bottles would be worth about €136.3 billion in sales to ballygowan etc!

Brainwave edit: bulk purchase of billions of empty water bottles + strategic placement of said bottles = fixed economy and no more floods! You're welcome everybody

Dyr

Su Campu wrote: »

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

Not it would'nt, it would get to the top and then spill over

Su Campu

Su Campu wrote: »

A total of 68.15 billion litres of rain fell on Dublin County on Monday. That's 53.6 TONNES per person!

Area = 921 km². Population 1.271 million. Average rain 74 mm (Casement, Dublin Airport, Phoenix park, Dun Laoghaire Harbour)'

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

Now, I'd like to see you now work out how thick the retaining walls would be at the base of this column!

Irish Steve

Rougies wrote: »

Brainwave edit: bulk purchase of billions of empty water bottles + strategic placement of said bottles = fixed economy and no more floods! You're welcome everybody

You can't do that

Someone somewhere (Most likely an EU bereaucrat) would be bound to protest that you'd violated their human rights,

or even more worrying,



the absence of that much water from the cycle would mean that the weather in Ireland would be completely out of kilter until we put it ALL back again;):p

It's getting late:D

Irish Steve

Irish Steve wrote: »

You can't do that

Someone somewhere (Most likely an EU bereaucrat) would be bound to protest that you'd violated their human rights,

or even more worrying,



the absence of that much water from the cycle would mean that the weather in Ireland would be completely out of kilter until we put it ALL back again;):p

It's getting late:D

Chances are that the council would take you to court for theft of "their" water.

Su Campu

If Monday's rain had fallen as snow it would be around 1 - 1.5 m deep! Fairly impossible for Ireland but hypothetically!

lovelyhurler

if Monday's rain had fallen as snow it would be around 1 - 1.5 m deep! Fairly impossible for Ireland but hypothetically!

just to think that if the temperature was a few degrees colder, all that rain could (in theory) have fallen as snow............................

octo

Su Campu wrote: »

A total of 68.15 billion litres of rain fell on Dublin County on Monday. That's 53.6 TONNES per person!

Area = 921 km². Population 1.271 million. Average rain 74 mm (Casement, Dublin Airport, Phoenix park, Dun Laoghaire Harbour)'

Another way of putting it is if it were poured onto Croke Park's pitch it would form a column of water 5.35 km high!

Ha, very good. Another way of looking at it is if all the rain that fell on Dublin was instead poured into the world's oceans, it would raise the water level by 1.89 * 10E-4 mm....

pauldry

You know the way that the rain woulda filled Croke Park 5.35km high.......... is that why UCD v Shams was cancelled? Altitude sickness.

Coles

...





Moving swiftly along...;)


If 120mm fell across the 322km2 Poulaphuca catchment the total water held in the Poulaphuca dam increased by 38.6 million cubic meters, and this water will drive the turbines at Poulaphuca and Goldenfalls to produce 16500kw of energy continuously for 300 hours. A total of 5,000,000 kWhrs of electricity. Not bad for one rainy day.

Deep Easterly

Rougies wrote: »

Brainwave edit: bulk purchase of billions of empty water bottles + strategic placement of said bottles = fixed economy and no more floods! You're welcome everybody

That is not a bad idea. We'd have to come up with a catchy, pseudo-celtic, type name for the product though as simply labeling it 'Dublin Rain Water' might potentially turn people off it.

Coles

Deep Easterly wrote: »

That is not a bad idea. We'd have to come up with a catchy, pseudo-celtic, type name for the product though as simply labeling it 'Dublin Rain Water' might potentially turn people off it.

"L'eau des Nuages"?

4Sheets

Should there not be thread for Monday 20-40mm potential in MT forecast? is there a danger of repeat flooding..lashing here at the moment..some dark red cells passing over.

Not

ME, on the 9pm forecast last night, mentioned up to 80mm over the next week, without any mention of what their assessment of its flooding potential might be. That's a lot of rain, more than the monthly average total if I'm not mistaken, so I find their lack of mention of the f word curious.

DominoDub

I have a bad feeling that with many rivers , streams and drains still full we could be in for more flooding , we just got our basement and lift shaft pumped & cleaned out

cherryghost

Just scaremongering. There's rain coming but its nowhere near as intense or lasting. Already past Athlone and we have some glorious sunshine.