Storm Callum - Thursday/Friday 11/12 October 2018 **READ MOD NOTE IN FIRST POST**

Graces7

Has the wind changed? went out to look at the ocean which was not dramatic earlier and it is a seething glorious mass of breakers.

Still gusting fierce and loud.
west mayo offshore

Graces7

MJohnston wrote: »

Somehow we have numerous posters going on about how "it wasn't as bad as Ophelia", and yeah, no sh!t!

Ophelia was given a nationwide red level warning, Callum was given a coastal-county ORANGE warning. In other words *nobody ever forecast it to be anywhere near as bad as Ophelia*.

The reason "its no worse than a typical winter storm" is because it WAS a typical winter storm, and an orange warning doesn't suggest otherwise.

we actually did not see Ophelia out here. she turned into the midlands and avoided us..

For me it classes personally as my worst storm stats and experience wise in different ways.

Graces7

and it is not a contest.. just weather which many here sincerely enjoy and are experts in.

sryanbruen

Maximum wind gusts (km/h) (so far for Callum at least) for Storm Callum vs Storm Ali in the same style of GL's post for Ali vs Ophelia, from Ogimet synop reports.

For the majority, Ali had stronger maximum wind gusts than Callum but Storm Darwin is still on top out of the 4 for most stations.

Gaoth Laidir

Sycamore Tree wrote: »

How can you tell what the max gust was at a particular Met station (e.g. Roches Point) during a 24 hour period?

I use this for the synop stations (it doesn't have the likes of Athenry, Newport, etc.)

http://www.ogimet.com/resynops.phtml.en

Meteorite58

Great piece of work there sryanbruen !

Graces7

Meteorite58 wrote: »

Great piece of work there sryanbruen !

as always, and yes re belmullet..

Sycamore Tree

sryanbruen wrote: »

Met Éireann tweets them out.

Met Éireann's daily data.

Met Éireann's historical data.

Ogimet synop reports.

That's how I find them out anyway.

I must be missing it, when I go onto MetE site for a particular station I only see their most recent recording for a station. Can you send a link that would give me the windspeeds across a day for say Athenry?

Gaoth Laidir

ASCAT wind measurements from 22:11Z lastnight and 10:20Z this morning. ASCAT measurements tend to underreport strong winds, so add a few knots to the highest vectors shown.

Sycamore Tree

sryanbruen wrote: »

Maximum wind gusts (km/h) (so far for Callum at least) for Storm Callum vs Storm Ali in the same style of GL's post for Ali vs Ophelia, from Ogimet synop reports.

For the majority, Ali had stronger maximum wind gusts.

I am thinking the very localized Orange warning was bang on so - no station exceeded the 130km threshold and many stations much less than Ali.
Mace Head really sums up the difference.

recyclebin

Anyone able to modify that table to include Ophelia?

sryanbruen

recyclebin wrote: »

Anyone able to modify that table to include Ophelia?

I'll edit the post shortly with Ophelia added to it, I'll also add Storm Darwin of February 2014 for good measure.

sryanbruen

recyclebin wrote: »

Anyone able to modify that table to include Ophelia?

Done.

spookwoman

Waves not as bad as we though they would be this morning in Tramore. The slip wall was knocked in and the prom was covered in debris

https://twitter.com/LeahBurgessIre/status/1050718659503681536

Graces7

sryanbruen wrote: »

Done.

mayo always was a place apart.... storm callum rages on here..

MJohnston

sryanbruen wrote: »

Maximum wind gusts (km/h) (so far for Callum at least) for Storm Callum vs Storm Ali in the same style of GL's post for Ali vs Ophelia, from Ogimet synop reports.

For the majority, Ali had stronger maximum wind gusts.

It's worth noting:

Storm Callum = Orange warnings around the coast
Storm Ali = Orange warnings for Cavan, Monaghan, Donegal, Dublin, Kildare, Louth, Meath, Galway, Leitrim, Mayo, Sligo, Clare and Kerry.
Ophelia = Nationwide Red warning
Darwin = Red warning for Cork & Kerry, orange for Wexford, Galway, Mayo, Clare, Limerick, Waterford, yellow for everywhere else.

I believe the warning level system was revised sometime after Darwin though? Certainly they were heavily criticised for not providing enough warning for some counties.

Also regarding Callum, these stations reached Orange level criteria for gusts: Belmullet, Mace Head, Sherkin, Valentia. Roches and Finner Camp are borderline.

Anyone know what the max mean winds were?

JCX BXC

Wow, Callum had stronger winds than Ophelia, Darwin and Ali in Belmullet!

For much of the country, bar the extreme west coast, its Ali that seems to stand out.

pauldry

sryanbruen wrote: »

Maximum wind gusts (km/h) (so far for Callum at least) for Storm Callum vs Storm Ali in the same style of GL's post for Ali vs Ophelia, from Ogimet synop reports.

For the majority, Ali had stronger maximum wind gusts.

Great work once again.

Puts it in perspective .

Nothing much here in Sligo.

Maybe afternoon but its sunny now

ednwireland

i know sw donegal is supposed to get hit this afternoon but to be honest its a great day breeezy but nothing out of the ordinary strongest gust i measured was 6am and that wasnt significant.

if you're getting battered stay safe !

REBELSAFC

MJohnston wrote: »

It's worth noting:

Storm Callum = Orange warnings around the coast
Storm Ali = Orange warnings for Cavan, Monaghan, Donegal, Dublin, Kildare, Louth, Meath, Galway, Leitrim, Mayo, Sligo, Clare and Kerry.
Ophelia = Nationwide Red warning
Darwin = Red warning for Cork & Kerry, orange for Wexford, Galway, Mayo, Clare, Limerick, Waterford, yellow for everywhere else.

I believe the warning level system was revised sometime after Darwin though? Certainly they were heavily criticised for not providing enough warning for some counties.

Also regarding Callum, these stations reached Orange level criteria for gusts: Belmullet, Mace Head, Sherkin, Valentia. Roches and Finner Camp are borderline.

Anyone know what the max mean winds were?

Didn't the station in Sherkin lose power at the height of Ophelia?
I think there would have been a gust similar or even higher than that recorded at Roches point for Ophelia in Sherkin if the station stayed online for the whole storm.

Gaoth Laidir

MJohnston wrote: »

Anyone know what the max mean winds were?

Met Éireann used to report the max mean speeds in each hourly synop report but for some reason stopped doing so a couple of years ago.

MJohnston

Gaoth Laidir wrote: »

Met Éireann used to report the max mean speeds in each hourly synop report but for some reason stopped doing so a couple of years ago.

I guess we'll have to wait for the daily report tomorrow then?

Graces7

ednwireland wrote: »

i know sw donegal is supposed to get hit this afternoon but to be honest its a great day breeezy but nothing out of the ordinary strongest gust i measured was 6am and that wasnt significant.

if you're getting battered stay safe !

they said noon then 4 pm... sooner or later..

moeblogs

(Pic by Tina Schley)

ednwireland

Graces7 wrote: »

they said noon then 4 pm... sooner or later..

probably get battered as soon a i leave the office then !


Bright blue skies now !

Rikand

REBELSAFC wrote: »

Didn't the station in Sherkin lose power at the height of Ophelia?
I think there would have been a gust similar or even higher than that recorded at Roches point for Ophelia in Sherkin if the station stayed online for the whole storm.

Sting jet formed out to sea and took dead aim at sherkin. The station lost power right at the start of the storm. I reckon we definitely would have seen a higher gust there had power remained

Graces7

ednwireland wrote: »

probably get battered as soon a i leave the office then !


Bright blue skies now !

Yes, the sun is trying very hard to emerge from the clouds.... Callum is intent on staying around as long as he can... stamping his big feet.. the orange alert ends in 40 minutes,,,

nacho libre

A gust of around 80mph at Belmullet station is not unusual at this time of year. It surprising to see that Belmullet did not record a gust in excess of 90mph during Ophelia and Darwin. I guess if this system had tracked just a little further east, gusts of that magnitude might have been experienced. It seems storms in the past used to go up towards Scotland frequently, less so these days.

Donegal Storm

nacho libre wrote: »

A gust of around 80mph at Belmullet station is not unusual at this time of year. It surprising to see that Belmullet did not record a gust in excess of 90mph during Ophelia and Darwin. I guess if this system had tracked just a little further east, gusts of that magnitude might have been experienced. It seems storms in the past used to go up towards Scotland frequently, less so these days.

Yeah I mentioned that the other day, storms seem to be taking a more southerly track these past few years. Before ~2012 nearly every storm seemed to pass just to our north with Donegal, Mayo and Scotland being hit hardest, we seem to consistently avoid the strongest winds these days in Donegal. Maybe just coincidence but its definitely been noticeable

Gaoth Laidir

MJohnston wrote: »

I guess we'll have to wait for the daily report tomorrow then?

No, they don't give it in that, only the daily average and gust. It will be available in the daily climate Excel file downloads, but probably not for a month or so.

Gaoth Laidir

Thinking more about the 102-gusts at the WT2 buoy 16 km off the Mayo coast, it must be some sort of platform and not a buoy, like the Kinsale platform. It's just a little too high compared to Belmullet and the ASCAT data. There is also another buoy (WT1) located 6 km off the coast and it reached 98 kts, but it too must be a platform as it's only around 10-15 km from Belmullet station.

Donegal Storm

Gaoth Laidir wrote: »

Thinking more about the 102-gusts at the WT2 buoy 16 km off the Mayo coast, it must be some sort of platform and not a buoy, like the Kinsale platform. It's just a little too high compared to Belmullet and the ASCAT data. There is also another buoy (WT1) located 6 km off the coast and it reached 98 kts, but it too must be a platform as it's only around 10-15 km from Belmullet station.

Might be on a rig in the Corrib gas field..?

DOCARCH

Donegal Storm wrote: »

Might be on a rig in the Corrib gas field..?

No, they are buoys for the Atlantic Marine Energy Test Site (AMETS).

Doubt they are platforms, just regular buoys. Similar to this: http://www.oceanenergyireland.ie/Content/Images/Spokes/TestFacility/GalwayBay.png

sryanbruen

If there's one thing I found impressive about Callum, it was how deep it was (in terms of minimum pressure) considering we're only into October.

https://twitter.com/WorldClimateSvc/status/1050814049477414915

sryanbruen

In regards to the buoys,

https://twitter.com/kilkennyweather/status/1050829615697137665

Meteorite58

The pressure readings and gusts of the Storm passing up off the W coast. Strong winds in the early morning with big squally showers but but no damage here in Tralee or in the vicinity apart from a few trees and branches down . Very much a coastal event in the end. The front did not produce the projected wind speeds inland even though some high gusts reported in places. I think this is a lesson in that the computers might just struggle a bit with the effects of topography on advancing frontal wind and might be inclined to overstate the wind speeds in this kind of set up.The winds along the W coast were more in keeping with the forecast. The Storm produced plenty of lightning up along the W coast. Good to see the coastal defences working well in Galway, they were needed.

Quite wet here near Tralee had 20mm approx for event.











https://twitter.com/oclarkephotos/status/1050798170299670529

https://twitter.com/Buailtin/status/1050701888734289920

https://twitter.com/metoffice/status/1050774343133712387

https://twitter.com/PaulQuinnNews/status/1050647059898847232

https://twitter.com/wxcharts/status/1050461183566860288

https://twitter.com/patmcgrath/status/1050677777450467328


Must stick up my anemometer again tomorrow, systems failure last night :pac:

Darwin

@Meteorite58 excellent summary of the event, hope you get your anemometer sorted!

Gaoth Laidir

Looking at that UK Met Office twitter animation it does look like possible stingjet the way the cloud dissipates to the southeast of the low centre. That area coincides with the buoy locations, so it's feasible that Belmullet lay just outside the core boundary.

Also, the mean 72 knots I showed was I think a 1-minute mean. If you look at each datapoint, the mean shoots up with the gusts, so it stands to reason that we're not talking about the standard 10-minute mean, which was more like 60 knots around that time taking the average of all the readings. An illustration of why the Saffir Simpson scale doesn't really apply to extratropical windstorms. Still, 60 gust 102 does seem like a very high gust factor for a marine location.

Meteorite58

Storm Callum earlier today.


NASA

mickmackey1

Oscar Bravo wrote: »

Midnight, Valentia gusting 64 knots! stay safe in the South

And yet in the daily reports Valentia's max gust on the 11th was 52 kts and on the 12th was 48 kts. Just shows the hourly reports are unreliable.

Graces7

Local film footage from Belmullet

https://www.irishtimes.com/news/environment/eyewitness-footage-shows-flooding-in-mayo-as-storm-callum-rages-1.3661276

Rhineshark

Meteorite58 wrote: »

Storm Callum earlier today.


NASA

Completely non-technical comment, but beautiful image with the swirling system and the outlines of the islands below.

Amprodude

Rhineshark wrote: »

Completely non-technical comment, but beautiful image with the swirling system and the outlines of the islands below.

:rolleyes:

sryanbruen

MJohnston wrote: »

Anyone know what the max mean winds were?

Well now that a month has passed and the data is in (also time to actually make it), I thought I'd answer this question for you with an edited version of my chart showing the maximum wind gusts at selected Irish stations during several named storms. This one shows the highest 10-minute mean wind speeds at the same selected stations in that graph.

Darwin is king.



Data comes from Met Éireann.

sdanseo

sryanbruen wrote: »

Well now that a month has passed and the data is in (also time to actually make it), I thought I'd answer this question for you with an edited version of my chart showing the maximum wind gusts at selected Irish stations during several named storms. This one shows the highest 10-minute mean wind speeds at the same selected stations in that graph.

Darwin is king.

Data comes from Met Éireann.

Interesting to note. 3 speeds there at red warning level for Callum and 4 for Ali which both got orange in those areas. 5 for Opehlia which got one Nationwide.

And 13 red level mean speeds for Darwin. Just shows its size.