OMG

[zoidberg]

 

[Boathook]

A rogue wave or has it carried on like that ?

 

[sarabande]

I'll go with Boathook's comment.

I'm not sure of the smoothing algo in use, but the graphs of previous date/times do seem to be a bit 'lumpy'

https://imgur.com/a/PDGMU0x

 

[GHA]

could only find hourly data on the www.marine.ie site, data are max height in that hour it says. Nasty big storm, some real biggies now and again.