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Trough, trade-wind spark showers until Friday night
A trough and a trade-wind surge triggered showers and thunderstorms over the CNMI yesterday morning, while another trade-wind disturbance is expected to bring more showers in the Marianas today, Thursday, through Friday night.
According to the U.S. National Weather Service Guam, the trough moved to the west of the Marianas late last Tuesday and the trade-wind surge to the east sparked showers and thunderstorms over the Commonwealth yesterday morning.
A monsoon trough is a tropical or subtropical feature of low pressure in summer that extends from Asia eastward to the Philippines and occasionally into Micronesia.
Trade-wind refers to an area of enhanced showers, cloudiness, winds, and sometimes thunderstorms.
NWS said Saipan observations indicate up to nearly 2 inches of rain fell.
NMS said showers and thunderstorms are diminishing on Tinian and Saipan, but will affect Guam over the next several hours before tapering.
NMS is expecting more showers reaching the Marianas Thursday through Friday night as another trade-wind disturbance reaches the area.
“Conditions will be changing across central and eastern Micronesia later this week as a near-equatorial trough develops and brings showers and thunderstorms to most locations late in the week,” NWS said, adding that some areas will see east winds shifting to south and possibly even southwest over the weekend.
A near-equatorial trough refers to low pressure that is located near the equator.
