How can anyone hold at destination (especially on a "particularly bad say for weather") having burned through diversion and contingency fuel? Why hadn't they diverted half an hour previously?
Had they landed at IBZ or BCN on skosh fuel I'd be tempted to sympathyse (while wondering why they hadn't added plenty extra fuel given the forecast or diverted earlier).
As reported it sounds like a Very Big Deal indeed to me.
27 Aug 2023, 09:00 to 28 Aug 2023, 06:00 (UTC):
TAF AMD LEPA 270926Z 2709/2806 31012KT 9999 SCT010 TX27/2712Z TN19/2806Z PROB40 TEMPO 2709/2714 27020G50KT TEMPO 2709/2720 30015G27KT 2000 SHRA TSGR SCT030CB
27 Aug 2023, 18:00 to 28 Aug 2023, 18:00 (UTC):
TAF AMD LEPA 271834Z 2718/2818 30010KT 9999 SCT010 TX26/2812Z TN19/2806Z TEMPO 2718/2720 30033G55KT TEMPO 2718/2721 30015G27KT 2000 SHRA TSGR SCT020CB TEMPO 2720/2805 VRB04KT