21.   A low to mid level trough over the Leeward Islands late this afternoon will approach the local region this evening, passing across the waters late tonight and Sunday.

22.   A lower level trough across the eastern Caribbean will move westward over the U.S. Virgin Islands and eastern Puerto Rico tonight.

23.   A surface trough will remain nearly stationary east of the region through Thursday while a broad upper level trough continues over the eastern Caribbean and the adjacent Atlantic.

24.   A mid level trough will move across the local region through tonight.

25.   A mid to upper level trough will remain located west-northwest of the region into Friday, producing showers and thunderstorms across the waters.

26.   A stationary upper level trough is located over the northeast Caribbean.

27.   A weak low level trough continued across the eastern Caribbean during the morning.

28.   A weak low level trough located across the Mona Passage and Hispaniola this morning will still continue to influence our weather, especially the western half of the island.

29.   A weak low level trough will also affect our area Saturday with variably cloudy skies and scattered showers but widespread rainfall activity is not expected.

30.   A upper level trough was located across the extreme eastern Caribbean.

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%
level + n. >>共 452
trough 10.04%
talk 4.60%
official 3.54%
meeting 3.47%
pressure 3.11%
wind 2.76%
moisture 2.33%
contact 1.77%
disturbance 1.77%
cloud 1.70%
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