That's 27.7in for you mercurial Americans. Here's the BBC chart for the UK Monday lunchtime.
That is really very low pressure indeed and we will will see several tens of knots of wind at just about any runway in our sceptred isle (and its neighbours, where things will probably be worse). I don't recall ever seeing anything like 940 even close to the mainland - even 950 out in the Atlantic is dramatic.
So, the Youtube servers are braced for a whole new batch of stuff like this at Bilbao and of course this at Hamburg. The professionals are already swapping notes - seems Dublin is the place not be rostered.