Many thanks to SRAA contributor, Stewart Killeen, who shares the following recording and notes:

Notes: Shannon Volmet - SIGMET. A Shanwick Radio broadcast from the North Atlantic Communications Centre, providing meteorological information for aircraft in flight within the Shanwick area of international airspace (northeast part of the Atlantic).

Name: Stewart Killeen

Date of recording: 8/5/2021

Starting time: 0935UTC

Frequency: 5.501MHz

Reception location: Dublin, Ireland

Teceiver and antenna: Tecsun PL-660

Mode: AM