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22-11-2017, 00:56   #166
sryanbruen
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Quote:
Originally Posted by Donegal Storm View Post
There was hill snow in late October 2010 or '11 in Donegal, can't recall which. Thought I had a few pics somewhere but can't seem to find them
Yeah, I meant in lowland areas. Sorry that was my fault. I do remember some snow on mountains/hills, or wintry showers of other sorts being recorded to the northwest on October 18 2011. Met Éireann does not mention the word snow in their October 2011 bulletin but it does state that hail and thunderstorms were recorded on the 18th.


Last edited by sryanbruen; 22-11-2017 at 00:59.
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25-11-2017, 11:02   #167
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I did a similar post here for my friend to MT's in the Winter discussion thread. Instead, here we have the CET rankings of the Summers since 2005:

Some of them may really surprise you.

2005 - 49th warmest
2006 - 5th warmest
2007 - 183rd warmest
2008 - 148th warmest
2009 - 92nd warmest
2010 - 85th warmest
2011 - 258th warmest OR 101st coolest
2012 - 188th warmest
2013 - 45th warmest
2014 - 80th warmest
2015 - 178th warmest
2016 - 39th warmest
2017 - 60th warmest

All information is originally from the Hadley Centre.
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01-12-2017, 17:08   #168
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One of the more remembered Irish weather events in modern times was the Dublin flood on October 24 2011. This was one of Dublin's most severe flooding events on record. It was the worst flood to hit the region since November 2002.

On October 24 2011, Ireland was at the centre of a slow moving frontal depression stretching from western France to the south of Iceland. Combined with this depression was the battle of two air masses, a cooler air mass to the west of the front and the warm air mass to the east of the front. Long fetched southerlies took place at the same time. The contrast between the two air masses intensified the heavy rain along with the orographic uplift by the Wicklow mountains and the convergence of isobars. This heavy rain combined with heavy rain totals from the 23rd October 2011 which were up to 30mm, led to a saturation of soils and severe flooding. Here's the synoptics for 24 October 2011:





This is a table of the most significant figures recorded during this rainfall event. Casement Aerodrome had its wettest October day on record with 82.2mm during this and this made it the station's wettest overall day since June 1993.



Many homes and businesses were under water by the evening of October 24th. Dublin City Council activated a major emergency plan to deal with the floods. Several flights were delayed or cancelled at Dublin Airport.

The rainfall event caused two deaths as well as a lot of infrastructure damage estimated at a couple millions of euro.

Harolds Cross, Dundrum, Donnybrook and Irishtown were the worst affected areas in Dublin. The ground level of Dundrum Shopping Centre was flooded to bits as seen in this picture below:



Here's some more images and videos of the event.













Information originally sourced from Met Éireann.
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06-12-2017, 15:41   #169
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Since this came up in discussion, I thought I'd go over it here. This is going to be about the January 2008 easterly. BLIZZARD7 thanks for inspiring this post.

As the synoptic below shows, a slider low went in a southeast trajectory on the 3rd January 2008 along with a very stubborn Siberian block ridging into Scandinavia bringing the winds into the east across the Emerald Isle.

The easterly brought severe frosts but apart from a few regions having maximums of only 3-5c on the 3rd, 4th and 6th, maximums were generally around average for the time of year. The IMT for the first 6 days of January was 4.5c which included the very mild New Year's Day. Derrygreenagh, Co. Offaly had a minimum of -7.8c on the 4th, its lowest since 1994. The same station had a grass minimum of -14.6c on the same day, also its lowest since 1994.

This was a short lived easterly but for how deprived the 2000s were of cold, it was definitely worth it.

During the afternoon of the 3rd, heavy wintry showers occurred in the northeast and east. Snow was mixed in with these wintry showers. At the same time, frost became more severe as the day went on. The snow continued into the morning of the 4th before heavy rain pushed in from the west trying to introduce a milder interlude which it did for a short period but then the cold took over again before the mild won out on the 7th and for much of the rest of the month. BLIZZARD7 also shared this nice link in the December 2017 cold spell thread:

http://www.peterduncanson.net/snow/snow00.html

Quote:
On the 3rd January 2008 the weather forecast from the UK Met Office was for a slight fall of snow over eastern parts of Northern Ireland during the evening and night.

This was not expected to be much of a problem.

What we actually experienced was rather different. The snowfall was heavier than is typical for this part of the world.

The snow started falling during the afternoon of Thursday, 3rd January. Just before midnight I measured a 20 cm depth on the lawn. There was no wind; the snow was falling vertically.

As I wasn't sleepy, I checked the snow a few times. Approximately three hours after I'd measured 20 cm I saw that the snowfall had almost stopped, so I went outside to measure. It was then 30 cm (12 ins). Of course this is not deep compared with what is normal in more northerly parts of the UK or elsewhere, but it is the deepest I have measured on my lawn since moving here over 34 years ago.

My attention was caught by two things, the accumulation of snow on the bird feeders in the garden, the effect of the weight of snow on a bush near the house. At about 3:20 a.m. I took some photos. The best vantage point was indoors looking through a window.

Early in the afternoon the snow had stopped falling and rain was forecast, so I took some more photos while the snow was still lying. Then I took more pictures later in the afternoon when the thaw was well under way.

Two days later, Sunday, 6th January, the snow had mostly so cleared I took more photos to compare with the snowy ones. It was then that I made another discovery about the effect of the snow — a large bush has been damaged.


Data originally from Met Éireann.
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09-12-2017, 22:05   #170
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The confirmed IMT for November 2017 was 6.6c.
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09-12-2017, 23:12   #171
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These are Ireland's lowest air minimum temperatures for every year since 1988

2016: -7.3c at Markree on November 25th
2015: -7.9c at Dublin Airport on February 3rd
2014: -7.5c at Thomastown on December 29th
2013: -7.6c at Markree on March 12th
2012: -6.7c at Thomastown on February 2nd & Carrickmacross on February 3rd
2011: -8.3c at Thomastown on January 29th
2010: -17.5c at Straide on December 25th (-18.7c at Castlederg on December 23rd)
2009: -10.0c at Mullingar on December 25th
2008: -7.8c at Derrygreenagh on January 4th
2007: -8.0c at Cavan on February 7th
2006: -8.6c at Straide on March 3rd
2005: -5.6c at Casement Aerodrome on March 3rd
2004: -7.7c at Kilkenny on January 29th
2003: -6.3c at Ardee on January 11th
2002: -9.4c at Ballinamore on January 1st
2001: -9.0c at Casement Aerodrome on March 1st
2000: -14.0c at Straide on December 29th
1999: -6.7c at Clones on January 11th
1998: -5.5c at Casement Aerodrome on April 10th (Unusually late date for a minimum temperature as well in 1998 Elmer Blooker )
1997: -6.8c at Valentia Observatory on January 3rd
1996: -5.9c at Casement Aerodrome on December 6th
1995: -11.0c at Clones on December 27th
1994: -6.4c at Birr on February 16th
1993: -7.4c at Ardee on December 26th
1992: -8.3c at Casement Aerodrome on December 20th
1991: -13.0c at Gowran Grange on February 10th
1990: -5.4c at Birr on November 28th & Clones on November 29th
1989: -7.0c at Kilkenny on November 27th & Birr on December 1st
1988: -6.9c at Birr on November 21st & Mullingar on November 24th
1987: -9.2c at Mooncoin on January 13th
1986: -6.9c at Casement Aerodrome on February 21st
1985: -9.5c at Ballinrobe on January 18th
1984: -10.0c at Clones on January 19th/20th
1983: -6.0c at Glencolmkille on December 10th
1982: -14.6c at Birr on January 12th
1981: -12.4c at Mullingar on December 12th
1980: -8.0c at Ardee on January 2nd
1979: -16.8c at Ballinrobe on January 1st

Information from Met Éireann's weather summaries and bulletins.
Post updated to include the lowest minimums for 1979 to 1987 now.
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10-12-2017, 01:53   #172
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Just a suggestion ,wonder could you ever do a piece on Dec 81. I was 8 at the time and remember it being cold ( lived in south county Dublin) but don't remember getting snow or at least settling snow but at the same time parts of the UK got plastered.
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10-12-2017, 01:59   #173
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Just a suggestion ,wonder could you ever do a piece on Dec 81. I was 8 at the time and remember it being cold ( lived in south county Dublin) but don't remember getting snow or at least settling snow but at the same time parts of the UK got plastered.
Did a very brief one earlier in the general discussion thread for today's (I almost said tomorrow) event. However, I'll try and do a more in-depth one for you here, along with bringing that information into this thread.

Don't be afraid to ask for things you'd like to know historical weather wise in Ireland! That's what this thread and I'm here for.
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10-12-2017, 02:02   #174
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I never knew December 2000 was quite that cold, we had loads of snow in Donegal but I can't recall it being anywhere close to 2010 in terms of depth of cold
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10-12-2017, 02:08   #175
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I never knew December 2000 was quite that cold, we had loads of snow in Donegal but I can't recall it being anywhere close to 2010 in terms of depth of cold
I mention about it here at the start of this post (Winter 2000/01 analysis), it's quite marvelous how cold it was and is quite forgotten by some:

https://www.boards.ie/vbulletin/show...&postcount=160

The severe cold of getting down to -14.0c took place the day after the snow on the 27th/28th. Unfortunately, the 31st then brought a much milder southerly flow.
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10-12-2017, 14:59   #176
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December 1981 was the coldest December of the century with an IMT of only 1.1c, -4.5c below the average. December 2010 had an IMT of -0.7c in comparison, -6.3c below the average.

Here's what Met Éireann say about the month:

Quote:
The period from the 1st to 4th was cloudy and mild with extensive fog and patches of drizzle. A wave depression affected the southwest on the 5th after which a northwesterly airflow set in. Squally showers occurred, some heavy especially in northern areas on the 7th. Weak troughs of low pressure affected the country between the 8th and 10th and high pressure dominated the 11th and 12th. There was extensive freezing fog during these spells Strong winds and widespread heavy falls of snow or rain occurred in all areas on the 13th, associated with a depression centred over southern areas.

A ridge of high pressure developed on the 14th and the period to the 19th was very cold and dry with general air frost and sharp to severe ground frost.
Mild air in a complex frontal trough affected the country during the 19th and there was widespread heavy rain, especially in southern regions. The period from the 20th to the 22nd was foggy with spells of drizzle and there was light frost at night in some places. Subsequently, a cold easterly airflow was established and widespread frost became severe between the 23rd and 25th.

A strong south to southeast airflow set in during the 25th. The weather became mild with extensive rain and drizzle. Winds backed easterly on the 28th and there was widespread heavy rain on the 28th and 29th. Rain became scattered on the 30th and 31st and some frost occurred at night.
Looking at this information from ME, December 1981 does not seem like a particularly amazing month does it? Well the thing was that the majority of the severe cold was associated with extensive fog which in Winter often leads to a lot of frost. Mullingar had the minimum for December with -12.4c on the 12th, the night before the depression that brought widespread snow on the 13th.





https://en.wikipedia.org/wiki/December_1981_windstorm

There isn't a lot of information on December 1981 found online for Ireland's weather, probably due to the lack of snow it had especially in comparison with January 1982 despite being a colder month overall.
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14-12-2017, 09:44   #177
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When was Spring sunnier than the Summer for the UK? All of the following years (seems to have become much more common within the past decade). There is no average sunshine totals currently for Ireland as a whole unlike the UK thus why I can only show the UK - if I can, I might calculate the ISTs in future (Irish Sunshine Totals) like I am currently with the IMTs going back further than the 1980s.

2017 Spring: 497.6 hours | Summer: 493.6 hours
2016 Spring: 487.7 hours | Summer: 474.7 hours
2015 Spring: 509.3 hours | Summer: 499.2 hours
2012 Spring: 477.8 hours | Summer: 402.7 hours
2011 Spring: 516.1 hours | Summer: 472.8 hours
2010 Spring: 499.8 hours | Summer: 494.8 hours
2008 Spring: 473.6 hours | Summer: 451.4 hours
2007 Spring: 521.3 hours | Summer: 473.0 hours
2002 Spring: 454.6 hours | Summer: 439.0 hours
1987 Spring: 415.8 hours | Summer: 401.9 hours
1982 Spring: 496.2 hours | Summer: 463.3 hours
1980 Spring: 464.3 hours | Summer: 395.8 hours
1958 Spring: 422.8 hours | Summer: 416.3 hours
1956 Spring: 504.8 hours | Summer: 456.0 hours
1954 Spring: 432.8 hours | Summer: 376.8 hours
1953 Spring: 491.6 hours | Summer: 479.8 hours
1948 Spring: 557.5 hours | Summer: 425.9 hours
1946 Spring: 479.4 hours | Summer: 459.2 hours
1942 Spring: 484.0 hours | Summer: 465.5 hours
1929 Spring: 534.2 hours | Summer: 525.0 hours

Information from: http://www.metoffice.gov.uk/pub/data...ne/date/UK.txt
2017 added to the list with a difference of just 4.0 hours.

Last edited by sryanbruen; 14-12-2017 at 13:05.
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14-12-2017, 11:37   #178
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1997: -6.8c at Valentia Observatory on January 3rd

This has to be one of the strangest weather statistics in Irelands history.

How?
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14-12-2017, 13:40   #179
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These are Ireland's maximum temperatures for every year since 1986

2017: 28.6c at Phoenix Park on June 21st
2016: 30.4c at Mount Dillon on July 19th
2015: 26.1c at Glasnevin on June 30th
2014: 28.8c at Durrow on July 25th
2013: 31.0c at Dooks on July 19th
2012: 28.3c at Ardfert on May 25th
2011: 26.0c at Cavan & Athy on June 3rd
2010: 26.8c at Ardfert on May 23rd
2009: 28.6c at Galway on June 2nd
2008: 25.2c at Shannon Airport on July 24th
2007: 26.9c at Ballyshannon on June 9th
2006: 32.3c at Elphin on July 19th
2005: 30.3c at Kildalton on July 12th
2004: 27.3c at Birr on August 1st
2003: 30.3c at Belderrig on August 8th
2002: 25.6c at Clones on August 5th
2001: 28.4c at Ardee on July 28th
2000: 28.1c at Ballygar on June 18th
1999: 27.4c at Kilkenny on July 31st
1998: 25.4c at Belmullet on September 21st
1997: 28.4c at Ardfert on May 31st
1996: 27.0c at Shannon Airport on June 16th
1995: 30.8c at Kilkenny on August 2nd
1994: 25.1c at Casement Aerodrome on July 23rd
1993: 25.0c at Cathaleen's Fall on June 28th
1992: 25.6c at Birr on June 29th
1991: 28.4c at Cahirciveen on September 5th
1990: 29.5c at Casement Aerodrome on August 3rd
1989: 30.0c at Shannon Airport on July 18th
1988: 25.1c at Birr on June 14th
1987: 26.6c at Dublin Airport on August 16th
1986: 26.5c at Kilkenny on July 14th

Information from Met Éireann's weather summaries and bulletins.
Updated with 2017 and 1986/87. Will include more years in future if I find a source that can show Ireland's maximums for pre-1986 years.
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14-12-2017, 13:51   #180
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1997: -6.8c at Valentia Observatory on January 3rd

This has to be one of the strangest weather statistics in Irelands history.

How?
It was. January 1997 is a very strange month anyway. It was a very dry month, so dry that it was the driest January on record for the majority of stations. The spell of very cold weather that began in December 1996 extended into early January. Stations barely rose above 1-2c during the first 9 days of the month in a persistent easterly phase. This air stream wasn't particularly sunny so there was a lot of cloud which give away to the unremarkable minimum temperatures. However, the 3rd was a sunny day out in the west of Ireland. With the clear skies came that weird record at Valentia Observatory which had been the lowest January minimum for the station since 1958. With these bitter easterlies came wintry showers which were quite frequent in the eastern half of the country during the first 4 days of January.



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