By Eric Leister, Meteorologist
July 14,2014; 9:30PM,EDT
In the western Pacific, Typhoon Rammasun is on track to impact the Philippines with flooding rain and damaging winds Tuesday and Wednesday.
Rammasun strengthened to a typhoon on Monday under favorable environmental conditions of warm ocean water temperatures (30-31°C or 86-88°F) and generally low wind shear.
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 a bit more prior to landfall in the Sorsogon Province of the Philippines near the municipality of Barcelona Tuesday night local time.
RELATED:
AccuWeather.com Western Pacific Typhoon Center
Philippines Weather Center
China Weather Center
Damaging winds and flooding rainfall are expected across the north-central and northern Philippines as Rammasun moves across the island nation late Tuesday into Wednesday.
Impacts from Rammasun are already being felt across the eastern Philippines Monday night, local time, as outer bands of rain and wind move onshore. Heavier rain and the greatest threat for flooding will not arrive until Tuesday, continuing through Tuesday night before winding down on Wednesday.
Satellite image of Rammasun on Monday, courtesy of NOAA.The greatest impacts are expected across northern Visayas and southern Luzon, close to the storm track. Heavy rain will total 100-200 mm (4-8 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 bring the threat for flooding rains and damaging winds to southern China with the greatest impacts likely in Hainan and western Guangdong provinces.
Continue to check back with the AccuWeather.com Hurricane Center for the latest on Rammasun and its effects in the Philippines and, eventually, into China.
Meteorologists Adam Douty and Erik Pindrock contributed to this story.
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