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06-08-2018, 14:38   #691
sryanbruen
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Irish heatwaves excel file updated with more stations attached.

You can also view this as a table here: https://bruener45.wixsite.com/britis...rish-heatwaves
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File Type: xlsx Irish heatwaves.xlsx (53.3 KB, 18 views)
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06-08-2018, 21:07   #692
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Huge work Syran, thanks. You went from 116 heatwaves yesterday to 334 which really shows that Ireland can be warm. Surprisingly this century does not dominate - August and July 1976 do. A good August 2018 is needed!

The highest mean maximum is 29.9 (Enniscorthy in 1983 with the maximum there at 31.2 which is very close to the mean) so that 30 is a barrier still standing for the mean maximum in a heatwave.

Last edited by echat; 06-08-2018 at 21:11.
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07-08-2018, 10:44   #693
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This is every ice day that Cavan (Loretto College) recorded. An ice day is a day where the maximum temperature does not get above 0c all day. This station of course holds Ireland's all-time low maximum on record for any month of -9.8c on 21st December 2010.

DayMaximum temperatureMinimum temperature
27 Dec 1995-4.0-12.0
28 Dec 1995-1.0-10.5
28 Dec 2000-2.0-7.5
29 Dec 2000-1.5-11.1
24 Dec 2009-1.1-6.7
8 Jan 2010-1.0-10.8
28 Nov 2010-0.4-5.7
2 Dec 2010-0.5-6.1
3 Dec 2010-0.3-7.8
6 Dec 2010-0.2-7.4
7 Dec 2010-1.1-11.4
8 Dec 2010-0.5-12.1
18 Dec 2010-3.0-9.9
19 Dec 2010-1.5-11.1
20 Dec 2010-6.3-13.9
21 Dec 2010-9.8-12.8
22 Dec 2010-4.9-14.4
23 Dec 2010-2.1-14.2
24 Dec 2010-2.3-14.2

Data comes from Met Éireann.
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07-08-2018, 11:09   #694
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December 2010 was cold.
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07-08-2018, 11:14   #695
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December 2010 was cold.
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07-08-2018, 12:25   #696
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Which is more common in Ireland, Very hot days of temperature maxing out at 30c or over or Ice days when temperatures only max out at 0c or below? Take your time to answer this question. At least we’ve seen both these days this year but I think the very hot days leading. December 2010 brought a good deal of ice days. It's not every year that you get very hot days nor ice days. Yet you seldom come across such days in the one year such as 2018.
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07-08-2018, 12:52   #697
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Quote:
Originally Posted by Jpmarn View Post
Which is more common in Ireland, Very hot days of temperature maxing out at 30c or over or Ice days when temperatures only max out at 0c or below? Take your time to answer this question. At least we’ve seen both these days this year but I think the very hot days leading. December 2010 brought a good deal of ice days. It's not every year that you get very hot days nor ice days. Yet you seldom come across such days in the one year such as 2018.
I have no evidence to back this up but I'd say ice days used to be more common than 30c+ days but recently I'd say 30c+ has become more common than ice days. I'm sure someone will have a better answer.
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07-08-2018, 23:52   #698
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Quote:
Originally Posted by Jpmarn View Post
Which is more common in Ireland, Very hot days of temperature maxing out at 30c or over or Ice days when temperatures only max out at 0c or below? Take your time to answer this question. At least we’ve seen both these days this year but I think the very hot days leading. December 2010 brought a good deal of ice days. It's not every year that you get very hot days nor ice days. Yet you seldom come across such days in the one year such as 2018.
That's a very good question and will require a lot of compiling lists. I will be looking for any day that failed to reach above 0c or reached/exceeded 30c at any station i.e. so like if only one station fits the criteria, that day will be considered in answering your question. I do this because of regional variation.

Meanwhile, I've been up to making a weather record table for Dublin Airport - will do more if people love them.

I have attached the Word document containing the table if the table image here is too small (for some reason, not all of the table is showing up when I copy and paste it into Paint) or you want to make use of the data for yourself.



Data comes from Met Éireann.
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File Type: docx Dublin Airport Records.docx (20.9 KB, 1 views)

Last edited by sryanbruen; 08-08-2018 at 09:09. Reason: Table fixed
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08-08-2018, 00:08   #699
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I would guess that 1947 produced ice and tar-melt days
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08-08-2018, 00:11   #700
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IIRC, we've had 4 ice days and three over 30s days in 2018. Will check the records soon and confirm.
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08-08-2018, 15:59   #701
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Quote:
Originally Posted by sryanbruen View Post
That's a very good question and will require a lot of compiling lists. I will be looking for any day that failed to reach above 0c or reached/exceeded 30c at any station i.e. so like if only one station fits the criteria, that day will be considered in answering your question. I do this because of regional variation.
I should be able to put together an SQL query that lists every ice day and 30C+ day. I'll have a look this evening when I'm home
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09-08-2018, 14:54   #702
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10 years ago today (9th August 2008), a cold front which pushed eastwards over the country gave away to heavy thunderstorms and intense rainfall for parts of Ireland. Unstable air behind the cold front helped to develop these thunderstorms following the passage of the front. The front brought outbreaks of light to moderate rain early in the day with totals reaching between 6-8mm and during the early afternoon, a cell developed over west Offaly. This spread to other parts of the east such as Kildare, Dublin and Meath during the afternoon and evening. At 16:00, Dublin Airport and Casement Aerodrome reported thunderstorms with very heavy rainfall. This rain kept going and going until just after nightfall. Dublin Airport had a daily rainfall of 76.2mm on the 9th August 2008 which at the time was the station's second highest daily fall on record only beaten by 11th June 1993 which recorded 92.6mm; it is now the second highest on record as 2nd August 2014 recorded 84.0mm at the station. Other heavy rainfalls included:

StationRainfall total (mm)
Celbridge (Ardglass)81.6
Botanic Gardens57.4
Casement Aerodrome40.9
Leixlip (Water Works)85.8
Glenasmole48.6
Straffan (Turnings)53.3
Phoenix Park58.8

*Leixlip (Water Works) recorded 77.8mm, Dublin Airport recorded 67.6mm and Celbridge (Ardglass) recorded 73.6mm in 5 hours. This Dublin Airport 5-hour rainfall total has a return period of 237 years. This meant rainfall rates per hour succeeded more than 100mm and would easily cause flash to severe flooding.

Here's three Dublin stations' rainfall totals for selected durations on 9th August 2008.



Here's an RTÉ Archives video on the event: https://www.rte.ie/archives/2018/072...-floods-chaos/

Pictures of the flooding:










https://en.wikipedia.org/wiki/2008_Irish_flash_floods
https://www.rte.ie/news/2008/0810/106807-floods/
https://cli.fusio.net/cli/bulletin/m...m-2008-Aug.pdf
https://www.met.ie/cms/assets/upload...08rainfall.pdf

Data comes from Met Éireann.
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10-08-2018, 15:10   #703
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On this day 15 years ago (10th August 2003), the UK maximum temperature record of 37.1c at Cheltenham which was set on 3rd August 1990 was beaten with a new record of 38.5c at Faversham, Kent (+1.4c above the previous record). If this temperature is not accepted then Kew Gardens (also Gravesend) in Kent also recorded a maximum temperature of 38.1c on the same day which bet the previous record as well. These are possibly the highest temperatures in the UK since July 1808 when 40c was reported in the UK but this is not official.

Other days preceding the big day (10th August 2003) also had very high maximum and minimum temperatures. Examples include 34.8c at Jersey Airport on the 5th August and a night time minimum of 23.7c at Guernsey Airport on the 4/5 August 2003 which was the highest on record beating 22.9c on 2/3 August 1990. St. Mawgan in Cornwall had a nightime minimum of 23.1c on the same night smashing its previous record of 20.4c on 28/29 July 1976. Gravesend, Kent recorded 36.4c on 6th August 2003 whilst Wisley, Surrey had 36.1c. Enfield (London) recorded 36.4c on the 9th. Greycrook in Scotland recorded a maximum of 32.9c on the 9th which was an all-time high temperature for Scotland for any month beating the previous record of 32.8c at Dumfries on 2 July 1908. 33.1c at Motherwell on 28 June 2018 was provisionally the new Scottish record beating this high of August 2003 but due to an ice cream van that came nearby the station, it was disregarded.

This all ended with a bang as Carlton-in-Cleveland recorded 30mm in the space of 5 minutes under a violent thunderstorm. It's funny to think that on the exact same day 110 years before (10th August 1893), 32mm fell at Preston in 5 minutes under a violent thunderstorm also.

The UK Met Office article here has more station records that were beaten during this August 2003 hot spell: https://www.metoffice.gov.uk/climate...3maxtemps.html
https://onlinelibrary.wiley.com/doi/...256/wea.10.04A
http://news.bbc.co.uk/2/hi/uk/3138865.stm

Data comes from the UK Met Office.









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10-08-2018, 19:20   #704
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Quote:
Originally Posted by sryanbruen View Post
10 years ago today (9th August 2008), a cold front which pushed eastwards over the country gave away to heavy thunderstorms and intense rainfall for parts of Ireland.

Data comes from Met Éireann.
I vaguely remember this. Wasn't there some big GAA match in Dublin that day? Could be mistaking this for another event around this time though.
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10-08-2018, 22:18   #705
sryanbruen
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I vaguely remember this. Wasn't there some big GAA match in Dublin that day? Could be mistaking this for another event around this time though.
The RTÉ Archive report of the day says:

Quote:
The crowd at Croke Park were also affected by the downpours with match goers warned that outside the stadium, Jones’s Road had flooded. The soccer match between Shamrock Rovers and Sunderland scheduled to take place at Tolka Park was cancelled.
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