Drought/Low Rainfall Watch - Summer 2018

DOCARCH · 11-07-2018 10:38am

Light rain being reported at Dublin AP at 1030.

sryanbruen · 11-07-2018 10:38am

DOCARCH wrote: »

Light rain being reported at Dublin AP at 1030.

Yeah, drizzle here in Dublin 13.

skeogh82 · 11-07-2018 10:40am

sryanbruen wrote: »

Yeah, drizzle here in Dublin 13.

I realised it was raining when I smelled it through the window - so fine you wouldn’t even see it unless you were looking carefully!

Xenji · 11-07-2018 10:46am

3.2mm of rain dropped this morning in Castlebar, up to 5.1mm of rain in 22 days now.

DOCARCH · 11-07-2018 11:07am

A little drizzle/light rain now in Dublin 16.

Trebor176 · 11-07-2018 11:13am

Light rain in D22 now.

Mobhi1 · 11-07-2018 11:14am

I just noticed the ground was damp here in Glasnevin, for the first time in ages. It's 17.8C. RH 80%.

DOCARCH · 11-07-2018 11:17am

DOCARCH wrote: »

A little drizzle/light rain now in Dublin 16.

Gone now. Barely enough to lightly dampen the ground.

Rougies · 11-07-2018 1:31pm

Dublin and Casement reporting 0.01mm at 12:00 and Dublin 0.01mm again at 13:00. I didn't catch the earlier reports but I imagine they were similar.

I wonder if will we even break a hair's breadth of rain today? The thickness of a human hair is on average about 70 microns (0.07mm)

sryanbruen · 11-07-2018 4:19pm

https://twitter.com/rtenews/status/1017062406684585987

Gaoth Laidir · 11-07-2018 4:49pm

Rougies wrote: »

Dublin and Casement reporting 0.01mm at 12:00 and Dublin 0.01mm again at 13:00. I didn't catch the earlier reports but I imagine they were similar.

I wonder if will we even break a hair's breadth of rain today? The thickness of a human hair is on average about 70 microns (0.07mm)

That's just trace (Tr) amount. Not enough to tip the bucket.

JCX BXC · 11-07-2018 5:20pm

Completely sunny in West Clare, warm day, light northerly. Completely dry too.

Meteorite58 · 11-07-2018 11:46pm

https://twitter.com/WMO/status/1017017130800373760

prinzeugen · 12-07-2018 12:20am

sryanbruen wrote: »

https://twitter.com/rtenews/status/1017062406684585987

Was reading that similar sites are being discovered in the UK. Everything from ancient roman forts and roadways to long buried WW2 airfields. Drones are helping find them as they can only be seen from the air.

Oneiric 3 · 12-07-2018 7:07am

Swiss model has a painfully weak front closing in on the NW coast on Saturday morning, which might, just might, give some spits and spots of rain to places as it passes through the country over the course of the day:

Regarding any rain potential for next week, still looking very tenuous at this point, with any active Atlantic fronts seemingly being pushed back with every new run. Hopefully the ECMWF this morning will show some sort of promise.

Graces7 · 12-07-2018 7:32am

prinzeugen wrote: »

Was reading that similar sites are being discovered in the UK. Everything from ancient roman forts and roadways to long buried WW2 airfields. Drones are helping find them as they can only be seen from the air.

Getting down to the bare bones now :eek:

Oneiric 3 · 12-07-2018 1:04pm

Just going through yesterday's data on Met Eireann site, and despite Dublin Airport reporting 11 hours out of 24 where 0.01mm of prep either from mist, fog or drizzle, their 'yesterday's weather' page only has 'tr' as the total prep at this station, which is curious, given that they state:

"Rain is total precipitation plus deposition in mm. tr means less than 0.05mm"

The cumulation of yesterday's 'trace' totals at D.A amounted to 0.11mm.

Source: https://www.met.ie/latest-reports/observations/download/Dublin-Airport/yesterday

Graces7 · 12-07-2018 1:10pm

It is very oppressive out there now. Still and heavy and cloud cover low. You never know

West Mayo. offshore island

JCX BXC · 12-07-2018 1:11pm

Oneiric 3 wrote: »

Just going through yesterday's data on Met Eireann site, and despite Dublin Airport reporting 11 hours out of 24 where 0.01mm of prep either from mist, fog or drizzle, their 'yesterday's weather' page only has 'tr' as the total prep at this station, which is curious, given that they state:

"Rain is total precipitation plus deposition in mm. tr means less than 0.05mm"

The cumulation of yesterday's 'trace' totals at D.A amounted to 0.11mm.

Source: https://www.met.ie/latest-reports/observations/download/Dublin-Airport/yesterday

It was likely quite a rough figure. 0.01 could mean 'something very small was recorded'

Oneiric 3 · 12-07-2018 1:24pm

JCX BXC wrote: »

It was likely quite a rough figure. 0.01 could mean 'something very small was recorded'

Didn't think Met Eireann were prone to using 'rough figures' in their data. Interestingly, Casement recorded 9 hours of 0.01mm yesterday, while Phoenix Park recorded none. So many Dublin stations to choose from. Wouldn't it be great if the same high density of stations were located in all other parts of the country too.

Mooooo · 12-07-2018 1:33pm

Is there anything to indicate the likelihood of this continuing past next week?

JCX BXC · 12-07-2018 1:37pm

Oneiric 3 wrote: »

Didn't think Met Eireann were prone to using 'rough figures' in their data. Interestingly, Casement recorded 9 hours of 0.01mm yesterday, while Phoenix Park recorded none. So many Dublin stations to choose from. Wouldn't it be great if the same high density of stations were located in all other parts of the country too.

No, but cmon, 0.01mm isn't much whatsoever. Context here!

ZX7R · 12-07-2018 1:37pm

Mooooo wrote: »

Is there anything to indicate the likelihood of this continuing past next week?

Way to eart to say,charts can't fully agree for next week fully, just looking for trends in each run

pauldry · 12-07-2018 1:47pm

The heaving Garavogue river in Sligo is currently maybe an inch deep with grass and stones showing everywhere.

The most rain we will get in the next 7 days is 20mm(very optimistic prediction)

That would be near normal for time of year.

But we need double the normal for 2 to 3 weeks.

The past 2 days have seen a total of 0.9mm of rain . No good.

Think the North and West drought will improve by late July but the East and South looks very problematic IMO

r93kaey5p2izun · 12-07-2018 1:58pm

Where do posters get the detailed hourly reports from stations so they can see decimal places in temperature readings and the 0.01 rainfall measurements for example? I can only find the hourly update on the "latest reports" which rounds off and is gone once the next update comes in, or the "daily data" under "past weather" which doesn't appear for yesterday until late morning.

Oneiric 3 · 12-07-2018 3:31pm

JCX BXC wrote: »

No, but cmon, 0.01mm isn't much whatsoever. Context here!

?
I am well within the context that I framed. 0.01mm isn't much, but a lot of little 0.01mms add up. Wasn't that the point I was making?

JCX BXC · 12-07-2018 3:35pm

Oneiric 3 wrote: »

?
I am well within the context that I framed. 0.01mm isn't much, but a lot of little 0.01mms add up. Wasn't that the point I was making?

My point was they don't offer measurements lower than 0.01mm, so any trace element of rain would simply come in as 0.01mm.

Even in a perfect world, the rain could have been 0.006mm (rounded to 0.01mm), which would make 0.066mm over 11 hours. Still above the trace threshold, but a good but off your 0.11mm.

We're realistically talking about ridiculously small amounts of rain here though oneric, it doesn't particularly matter.

Oneiric 3 · 12-07-2018 3:37pm

Gia Prickly Canoe wrote: »

Where do posters get the detailed hourly reports from stations so they can see decimal places in temperature readings and the 0.01 rainfall measurements for example? I can only find the hourly update on the "latest reports" which rounds off and is gone once the next update comes in, or the "daily data" under "past weather" which doesn't appear for yesterday until late morning.

If you go to the 'Yesterday's Weather' page on the new site, it will automatically give you the hourly data for Dublin Apt, no matter what part of the country you are in (you can't miss it as it takes up the entire screen upon first click) You have to click on the station map beside it to get data from other parts of the country.

https://www.met.ie/latest-reports/observations/yesterday

Oneiric 3 · 12-07-2018 3:46pm

JCX BXC wrote: »

My point was they don't offer measurements lower than 0.01mm, so any trace element of rain would simply come in as 0.01mm.

Even in a perfect world, the rain could have been 0.006mm (rounded to 0.01mm), which would make 0.066mm over 11 hours. Still above the trace threshold, but a good but off your 0.11mm.

We're realistically talking about ridiculously small amounts of rain here though oneric, it doesn't particularly matter.

It isn't 'my' 0.11mm. this is based on official data, and not an assumption based scenario such as the one you present; and while I agree these totals are insignificant, they still add up to more than 'tr' at the end of the day, both at D.A and at Baldonnel.

JCX BXC · 12-07-2018 3:51pm

Oneiric 3 wrote: »

It isn't 'my' 0.11mm. this is based on official data, and not an assumption based scenario such as the one you present; and while I agree these totals are insignificant, they still add up to more than 'tr' at the end of the day, both at D.A and at Baldonnel.

But was 0.11mm actually recorded? That's my point, how do you know exactly 0.01mm was recorded each of those hours? I'm of the opinion of no, that was not recorded. I doubt they add rounded figures at the end of the day as you're trying to do.

r93kaey5p2izun · 12-07-2018 4:08pm

Oneiric 3 wrote: »

If you go to the 'Yesterday's Weather' page on the new site, it will automatically give you the hourly data for Dublin Apt, no matter what part of the country you are in (you can't miss it as it takes up the entire screen upon first click) You have to click on the station map beside it to get data from other parts of the country.

https://www.met.ie/latest-reports/observations/yesterday

Thanks. Unfortunately the new site does not work on my phone.

Oneiric 3 · 12-07-2018 4:10pm

JCX BXC wrote: »

But was 0.11mm actually recorded? That's my point, how do you know exactly 0.01mm was recorded each of those hours? I'm of the opinion of no, that was not recorded. I doubt they add rounded figures at the end of the day as you're trying to do.

Because the data...official data... says so? You can download the data, I even provided the M.E link for you to do so, and add them up yourself.

JCX BXC · 12-07-2018 4:16pm

Oneiric 3 wrote: »

Because the data...official data... says so? You can download the data, I even provided the M.E link for you to do so, and add them up yourself.

But why add rounded figures Oneiric?

sryanbruen · 12-07-2018 4:16pm

JCX BXC wrote: »

But was 0.11mm actually recorded? That's my point, how do you know exactly 0.01mm was recorded each of those hours? I'm of the opinion of no, that was not recorded. I doubt they add rounded figures at the end of the day as you're trying to do.

Yes it was according to what Oneiric 3 is referring to, see the pics below as proof (for Dublin Airport):

Oneiric 3 · 12-07-2018 5:13pm

As of yesterday, Dublin Apt's 30 day total (since June 12) is standing at just 3.8mm. 40 day total (since June 2) also on just 3.8mm. 50 day total (since May 23) amounting to just 8.5mm and 60 day (May 13) total is a flood inducing 11.0mm.

Bring it on...

https://www.youtube.com/watch?v=ebt0BR5wHYs

M.T. Cranium · 12-07-2018 5:35pm

Just updating for our contest, the 11-station grid used for rainfall has averaged 0.8% of normal so far this month, about 1/120 of normal. And Malin Head leads the pack with a soaking wet 4%, Belmullet has 3% and Cork has 1%. The rest have essentially zero rainfall. As it was largely dry from 20 June on, the percentage since then could be even a touch lower.

Meteorite58 · 12-07-2018 6:49pm

River Arra barely a trickle in Newcastle West today.

CB19Kevo · 12-07-2018 7:27pm

Meteorite58 wrote: »

River Arra barely a trickle in Newcastle West today.

Maybe a good opportunity to clear debris/Rubish from Rivers nationally.

Reckless Abandonment · 12-07-2018 7:50pm

Just in from digging a hole for a post in the garden. Dry as a bone 1ft down. Don't know how half the plants in the garden are still alive.

Gaoth Laidir · 12-07-2018 7:51pm

The trace figure (was always "<0.05 mm but now this 0.01 figure has appeared) merely means the sensor got wet. I have noticed that no matter what the weather, Casement always reads Tr in its 06Z synop. It's done so over this recent dry spell, and we definitely know there was no hint of rain. My advice is to completely ignore any Tr reports and certainly don't add them up.

DanielL18 · 12-07-2018 10:46pm

Volcano West Cork

sdanseo · 12-07-2018 11:09pm

sryanbruen wrote: »

Yes it was according to what Oneiric 3 is referring to, see the pics below as proof (for Dublin Airport):

You would imagine if each of those is rounded up, then the daily total will be less than 0.1mm

However rounding works both ways so it could equally be as high as 0.149mm

Or of course .01 might be (must be?) the smallest unit used to measure in which case they would have to be added and therefore giving 0.11mm

But then that may be rounded down to the nearest 0.1 for the daily report?

Is absolute drought over? :pac:

joebloggs32 · 13-07-2018 1:38am

DanielL18 wrote: »

Volcano West Cork

Pyroclastic Surge!

DOCARCH · 13-07-2018 6:12am

0.8mm recorded since midnight here in Dublin 16. First rain recorded since June 20th.

Oneiric 3 · 13-07-2018 6:52am

This chart from the Swiss met office shows the rain probability for this coming Saturday:

Areas with the greatest chance of seeing some rain are W. Munster/Connacht and western parts of Ulster, with the chance in eastern and southern areas still looking poor, though can't be ruled out entirely. Either way, no great totals expected either on Saturday or the following few days. Best chance of some rainfall thereafter is towards the mid-week period next week, but still looking hairy for now.

Supercell · 13-07-2018 7:39am

Absolute drought of 22 days here over (June 20th last measured rainfall) with 1.0 mm rain measured this morning, quite a shock to see wet ground outside this morning. Obviously not nearly enough.

Graces7 · 13-07-2018 7:44am

Oneiric 3 wrote: »

This chart from the Swiss met office shows the rain probability for this coming Saturday:

Areas with the greatest chance of seeing some rain are W. Munster/Connacht and western parts of Ulster, with the chance in eastern and southern areas still looking poor, though can't be ruled out entirely. Either way, no great totals expected either on Saturday or the following few days. Best chance of some rainfall thereafter is towards the mid-week period next week, but still looking hairy for now.

met.ie keep promising then backing off.. Reminds me of "Alice" and the "Jam yesterday and jam tomorrow but never jam today" promise!

Mobhi1 · 13-07-2018 12:02pm

DOCARCH wrote: »

0.8mm recorded since midnight here in Dublin 16. First rain recorded since June 20th.

Still no rain recorded here in Glasnevin since the 20th June.

hinault · 13-07-2018 12:05pm

Supercell wrote: »

Absolute drought of 22 days here over (June 20th last measured rainfall) with 1.0 mm rain measured this morning, quite a shock to see wet ground outside this morning. Obviously not nearly enough.

Any amount of rainfall is better than no rainfall at all.

It's been cloudy/overcast here in Dublin these past two days, but it has remained dry throughout here.

It might sound simplistic but the longer there is no rain, the more it is required to rain when it does so.

MJohnston · 13-07-2018 12:10pm

The situation for Dublin is probably a bit more complex - the city itself can be completely dry but we'd be okay if there was a bunch of rain over the mountains, where our water is stored. No official weather stations up there though unfortunately!

Drought/Low Rainfall Watch - Summer 2018

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