First Minister Carwyn Jones and MP for Anglesey, Albert Owen, have arrived at a meeting in Holyhead. They will be joined by Welsh Secretary David Jones as well as business leaders on the island.
The meeting is taking place on HMS St Albans which is docked in the town's harbour.
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Some locally heavy showers are possible overnight, particularly in the east, where some thundery downpours are possible.
Wayne Pivac praised Scarlets' attacking style as they secured the Guinness PRO12 title with a stunning 46-22 success against Munster.
Scarlets sealed a famous victory at the Aviva Stadium in Dublin with an emphatic 46-22 victory over Munster in the Guiness PRO12 final.