The storm formed from an area of disturbed weather in western Micronesia, then underwent erratic development as it approached the Philippine island of Mindanao.
Maximum sustained winds were expected to be near 55 mph when the center of Washi made landfall near the port of Barobo.
Forecasters at the U.S. military’s Joint Typhoon Warning Center predicted that the storm would be weakened by its passage over Mindanao, then regain tropical storm force over the South China Sea.
Washi’s remnants could affect far southern Vietnam or even the Malay Peninsula during the following week, according to forecasters.
Tropical Storm Washi Track
Satellite Loop Data: CIMSS