In the western Pacific, Typhoon Rammasun is on track to threaten the Philippines Tuesday and Wednesday.
Rammasun strengthened back to a tropical storm early on Sunday morning local time after briefly weakening to a tropical depression. This strengthening continued on Monday as Rammasun reached typhoon strength.
Rammasun first became a tropical storm on Friday afternoon; however, after bringing very little wind to Guam as it tracked near the island, the intensity was downgraded back to a tropical depression. Guam received 25 to 50 mm (1 to 2 inches) of rain on Friday from Rammasun which was the wettest day since May 25.
Rammasun has the potential to further intensify as it approaches the Philippines and makes landfall Tuesday night local time.
Damaging winds and flooding rainfall is expected across the north-central and northern Philippines as Rammasun moves across the island nation late Tuesday into Wednesday.
Impacts from Rammasun are expected to begin in the eastern Philippines as early as Monday night, local time, as outer bands of rain begin to move onshore. Heavier rain and the greatest threat for flooding will not arrive until Tuesday, continuing through Tuesday night before winding down on Wednesday.
The greatest impacts are expected across northern Visayas and southern Luzon, close to the storm track. Heavy rain will total 100-150 mm (4-6 inches) along and near the track of the storm, including the cities of Naga and Manila where flooding will be a serious concern.
When crossing the Philippines, Rammasun is expected to weaken due to the interaction with land and will likely be a tropical storm as it emerges into the South China Sea. It will then move across the South China Sea and will begin to make a gradual turn to the northwest, towards the southern coast of China late in the week.
Moving over another area of very warm waters and low to moderate shear will give Rammasun the opportunity to regain typhoon strength before reaching China.
Late in the week Rammasun will then the threat for flooding rains and damaging winds to southern China with the greatest impacts likely in Hainan and western Guangdong provinces.
http://www.accuweather.com/en/weather-news/rammasun-to-strengthen-1/30302492