Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all,
Vanilla are planning an update to the site on April 24th (next Wednesday). It is a major PHP8 update which is expected to boost performance across the site. The site will be down from 7pm and it is expected to take about an hour to complete. We appreciate your patience during the update.
Thanks all.
Vanilla are planning an update to the site on April 24th (next Wednesday). It is a major PHP8 update which is expected to boost performance across the site. The site will be down from 7pm and it is expected to take about an hour to complete. We appreciate your patience during the update.
Thanks all.
Gearing up for record breaking warmth from the 11th Nov ---->
Comments
-
-
-
-
-
-
Advertisement
-
-
-
And this doesn't make the slightest bit of sense either.Elmer Blooker wrote: »According to Evelyn C on the radio forecast at 12.50 a new November was recorded today at Malin, 14c.
17.6C in 1997 at Malin Head.
16.2C with me today
Highest November temp since.......4/11/10
17.6C that day.0 -
-
-
Advertisement
-
-
Elmer Blooker wrote: »I did think that a temperature as low as 14c breaking a Nov record seemed odd at the time when Evelyn C said it?
She wasn't talking about daily average, was she?0 -
I think yesterday has further illustrated the point I was making about trying to get near 20 °C in mid November, despite very warm T850s, which were 10-12 °C over much of the country, as per this GFS analysis, and a Valentia sounding which gave 10.8 °C T850 at 06Z Sunday morning. Much of the country was devoid of low blankets of cloud, with mostly thin layers of mid-high level cloud, so we can't say that was the reason.
The only reason we got such warm 850 temps this far north at this time of the year was the strong southeasterly flow, but this very flow also led to mixing out of the boundary layer, dissipating whatever little heat that could be generated by the winter sunshine. Had that strong flow not been present, we would not have had that warm an airmass in the first place, and other factors would not have been strong enough to bring the temperatures up.
We did see Valentia get to 17.3 °C, most likely down to some Föhn warming in the lee of the Kerry mountains. As I showed, the temperature there yesterday morning was almost 20 °C at 500 metres, with low dewpoints too, typical of compressional warming. I have a feeling that that would have been the setup too that gave the 19.8 °C at Valentia in 1989 (anyone have an exact date?), and the 20.0 °C in Rathfarnham in 1946. That's the only way we can do it at this latitude at this time of the year - in a very localised way. The widespread max temps of 13 - 16 °C over the rest of the country backs up this point.0 -
-
-
-
Another Föhn....I mean fine day at Valentia today, reaching 17.1 °C. The 12Z sounding showed another strong inversion of around 17 °C and hydrolapse at around 960 hPa.
At the moment the next best looks like Belmullet on 15.6 °C, then Mace Head on 14.6 °C.0 -
The chart below shows the hourly temperature at Valentia Observatory (based on hourly synop readings from Ogimet) since the 1st of November to 18 UTC today. Also included is the hourly temperature readings for the same period in 2010 just for comparison:
in contrast to last year, the linear temperature trend at Valentia for the first 14 days of November this year is actually rising. Interesting also that we had minimum reaching 2.0c by this stage in 2010 at the station but has yet to fall below 4.0c this November so far. As a result, the average hourly temperature for the period in question is running 1.5c higher this year than at the same stage in 2010:
2010: 10.1c
2011: 11.6c
The reason for the higher temperatures this November at Valentia to date is mainly down to the frequency of southerly or southeasterly winds bringing in fairly mild and cloudy conditions overall.
The two tables below show the percentage frequency of wind direction at Valentia for the period both this year and in 2010:
as the two badly put together tables above show, the dominant wind direction during the first half of November 2010 was SW'ly within a fairly consistent westerly flow; this year, the most frequent direction is, most unusually, SSE, itself a result of fairly strong high pressure systems over central Europe. Notable is the very low frequency of the more normal SW / W directions this year.
Relative humidity values are also down a little this year as compared to last. In 2010, the hourly average RH values at Valentia for the first 15 days in November was 83.8%, this year, tis' 79.1%. Sea level pressure also up a little this time around at the station, with a mean hourly value of 1001.2 hPa for the period last year, while this year sees it at 1005.2 hPa for the same.
In sum, November this year is warmer than November last year so far. :cool:0 -
We did see Valentia get to 17.3 °C, most likely down to some Föhn warming in the lee of the Kerry mountains. As I showed, the temperature there yesterday morning was almost 20 °C at 500 metres, with low dewpoints too, typical of compressional warming. I have a feeling that that would have been the setup too that gave the 19.8 °C at Valentia in 1989 (anyone have an exact date?), and the 20.0 °C in Rathfarnham in 1946. That's the only way we can do it at this latitude at this time of the year - in a very localised way. The widespread max temps of 13 - 16 °C over the rest of the country backs up this point.
If you think it is not possible to get 20c in November you are wrong. A fohn effect is a legitimate recording. And with the temperature at Valentia recording 17.6c officially there was certainly a temperature close to 20c on the wayside of mountainous areas not recorded. And locally 19c was certainly reached. It was not a sunny day on Sunday in any case in any part of the country. I am satisfied and happy with my forecast. Too bad you want an "official" reading. Take local ones and stick to your convictions.
0 -
If you think it is not possible to get 20c in November you are wrong. A fohn effect is a legitimate recording. And with the temperature at Valentia recording 17.6c officially there was certainly a temperature close to 20c on the wayside of mountainous areas not recorded. And locally 19c was certainly reached. It was not a sunny day on Sunday in any case in any part of the country. I am satisfied and happy with my forecast. Too bad you want an "official" reading. Take local ones and stick to your convictions.
Firstly, it was 17.3 °C at Valentia.
I said all along that the only way we can get 20 °C is by Föhn effect and no other way. You disputed that, saying that the flow this weekend would not be continental and would be "warm at all levels".
With the exception of a Föhn temperature, which still only reached 17.3 °C anyway, nowhere near 19 or 20, the rest of the country varied from 13.2 to 16.1 °C. The thread title is "Record breaking warmth", and later you said "still on for the blowtorch from Africa". What records were broken? And where was 19 °C locally reached? Show me a record of such, even in an "unofficial" location, eg. someone's back garden.
If you are satisfied and happy with that forecast then good for you.0 -
Advertisement
-
Firstly, it was 17.3 °C at Valentia.
I said all along that the only way we can get 20 °C is by Föhn effect and no other way. You disputed that
You were proved wrong and you refuse to accept that fact. You are trying to wriggle your way out by straying from my fundamental argument that you can get temperatures over 20c in November in Ireland. I provided you the records. You still maintain the fiction that you cannot. If you don't respect my argument why should I respect yours? You say I don't like people disagreeing with me? It does not bother me at all.With the exception of a Föhn temperature, which still only reached 17.3 °C anyway, nowhere near 19 or 20, the rest of the country varied from 13.2 to 16.1 °C.
How many hours of sunshine did we have on Sunday?The thread title is "Record breaking warmth"
It could yet be record breaking in terms of the month as a whole.and later you said "still on for the blowtorch from Africa".
Sarcasm is a wonderful thing.What records were broken?
Patience.And where was 19 °C locally reached? Show me a record of such, even in an "unofficial" location, eg. someone's back garden.
I don't have to do that. Intuitively I am certain of it.If you are satisfied and happy with that forecast then good for you.
I am very happy.0 -
-
-
-
-
:D 
Advertisement