51.   However there is still a weak upper level trough just northwest of our area.

52.   However, a weak low level trough will moving westward over our area tonight causing scattered showers.

53.   However, a weak upper level trough will move west across our area tonight and Tuesday, bringing with it an increasing chance of showers and thunderstorms.

54.   In between these two weather features is a weak trough of low pressure located north and northeast of Puerto Rico and the Virgin Islands.

55.   Light winds will continue across ne Caribbean with weak surface trough remaining nearly stationary across northern coastal waters through Thursday.

56.   Morning satellite photos were showing a weak trough of low pressure extending from Cuba into the central Atlantic Ocean.

57.   Puerto Rico and U.S. Virgin Islands waters Synopsis ... A weak surface trough is in the Mona Passage moving slowly west.

58.   Satellite pictures this morning show that a weak frontal trough located north of Hispaniola has stalled.

59.   Scattered showers developed over the east coastal waters of Puerto Rico overnight as a weak low level trough moved across the island.

60.   Sea breeze convergence over the interior of Puerto Rico and a weak trough of low pressure over the south Atlantic to Puerto Rico.