1.   A frontal trough remains over the northern coastal waters this morning and should remain stationary and become more diffuse with time.

2.   A dissipating but relentless frontal trough remains across the northern caribbean this afternoon.

3.   A frontal trough continues in the vicinity of Puerto Rico this morning.

4.   A frontal trough located north of Puerto Rico will continue to weaken and move northward.

5.   A frontal trough remains stationary over Hispaniola.

6.   A frontal trough north of Puerto Rico will remain nearly stationary through the period.

7.   A frontal trough which affected the islands Thursday has moved northeast and away from the area.

8.   A weak frontal trough lies about one-hundred miles north of the region.

9.   A weak frontal trough located just south of our area continued to drift slowly to the northeast.

10.   A weak frontal trough nearby will continue to produce considerable cloudiness and scattered showers.

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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