From the 10/12 tropical discussion: A Central American Gyre has formed in the southwest Caribbean
GOES-16 Total Precipitable water clear shows large scale rotation
associated with the gyre. A surface trough is analyzed through the
developing gyre from 18N79W to 13N80W. Scattered showers and
isolated thunderstorms are noted from 10N-18N between 70W-84W,
although little to no showers are occuring north of 15N and west
of 80W. This gyre, or broad low pressure area, will slowly shift
W toward central America through early next week. Enhanced showers
and thunderstorms are expected to persist over the southwest
Caribbean.