The National Weather Service has canceled the tropical storm warning for Guam.

Gov. Felix Camacho has returned Guam to Condition of Readiness 4, said a news release from the Guam Homeland Security office.

The Emergency Operations Center and Joint Information Center and the island's 12 designated shelters will begin to scale down operations. All centers are expected to close by 5 p.m. today, the release said.

As of 1 p.m. Tropical Storm 18W was weakening in the Rota channel.

the center of the storm was located near latitude 13.8 degrees north and longitude 145.1 degrees east. That is about 35 miles northeast of Hag�t�a and 25 miles south of Rota.

Tropical Storm 18W was moving northwest at 22 mph and was expected to continue on the same track during the next 12 hours.

Maximum sustained winds are 40 mph.

Tropical Storm 18W was expected to weaken into a tropical depression during the next six to 12 hours.