Guam – The National Weather Service MONDAY morning issued a Tropical Storm Warning for the northern CNMI Islands of Alamagan, Pagan and Agrihan as Tropical Depression 20W approaches
20W is expected to pass across the northernmost CNMI islands Monday night.
There are no watches or warnings out for the southern islands of Guam, Rota or Saipan.
However, the NWS warns that “the larger scale weather pattern associated with 20W will also affect Saipan, Tinian, Rota and Guam in the coming days. Periods of heavy rainfall are expected with 2 to 5 inches expected through Tuesday night. Southwest winds of 20 to 30 mph will develop by [Monday] tonight and continue at times for the next few days.”
In addition, the National Weather Service warns that “Marine conditions will become hazardous so that a Small Craft Advisory and a High Surf Advisory may be need by tonight or Tuesday.”
As of 1 pm Monday morning, Tropical Depression 20W was centered near 17.3 degrees north latitude and 145.8 degrees east longitude.
* 275 miles northeast of Guam
* 150 miles east-northeast of Saipan
* 105 miles south of Agrihan
* 55 miles south of Pagan.
* 35 miles south south-west of Alamagan
Tropical Depression 20W is moving west-northwest at 13 mph. It is expected to become a Tropical Storm by Monday afternoon.
The National Weather Service advises residents of the Mariana Islands to remain alert and listen for the latest statements and forecasts from the National Weather Service and from local officials.