11.   A secondary frontal trough across the southern Atlantic is expected to drop southward across the region later Friday and increase the chance for showers.

12.   A weak frontal trough was located southeast of our region this morning and was becoming very diffuse.

13.   A weak frontal trough...North of the islands...Is expected to approach our area on tuesday.

14.   As the frontal trough weakens further beginning tonight and through the weekend ... Local weather will improve.

15.   Doppler weather radar still shows a weak surface frontal trough remaining over the offshore waters southwest of Puerto Rico.

16.   Frontal trough from n central coast of Hispaniola northeast across the Atlantic to move east into the Mona Passage this evening.

17.   Mostly middle to high clouds covered our islands this Wednesday morning in response to the approaching frontal trough from the northwest.

18.   Northeast winds at the upper level of the atmosphere will push the frontal trough southeast through late this afternoon.

19.   Pre- frontal trough ahead of the front.

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

a. + trough >>共 117
level 20.20%
upper 15.79%
surface 11.81%
weak 11.38%
low 5.12%
frontal 3.98%
low-level 2.84%
public 2.56%
low-pressure 1.99%
mid 1.14%
frontal + n. >>共 53
assault 17.06%
boundary 15.88%
system 13.24%
nudity 10.88%
trough 8.24%
attack 6.76%
crash 2.94%
zone 2.65%
collision 1.76%
cortex 1.76%
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