Build up of a ‘Low’

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office

(c) Crown copyright 2004, Published by the Met Office