A disturbance is being watched for tropical development as it moves into the South China Sea in the coming days.
This disturbance will continue to bring locally heavy rainfall to parts of the Philippines into the middle of the week as it drifts to the west-northwest.
The storm is expected to move over the open waters of the South China Sea by Tuesday. Warm ocean water, weak wind shear and little to no interaction with land will allow this storm to gradually become more organized.
"This low pressure area is expected to develop into a tropical depression within 24 to 36 hours," stated The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) in a statement released on Monday.
If the storm develops in the area PAGASA monitors for tropical development, it would be given the name Quiel by that agency.
The storm looks to continue to strengthen as it moves on a west-northwesterly tracks across the South China Sea through the middle of the week.
Occasional showers and thunderstorms will continue across the Philippines as the storm moves away from the area as tropical moisture will remain over the area.
By Wednesday afternoon the system may strengthen into a tropical storm and would be given the name Matmo by the Japan Meteorological Agency.
The window for further development will be closing late Wednesday into early Thursday as the storm is expected to make landfall along the south central coast or southeast Vietnam.
Winds will be increasing across these areas as the storm moves closer and gusts can reach between 65 and 97 km/h (40 to 60 mph) with the highest gusts occurring near the center of the storm, mainly on the northern side.
Wind gusts of this speed can bring localized damage and down some trees and power lines. Coastal flooding will also be a concern, especially in areas of the strongest onshore flow.
While the mountains near the coast of Vietnam will work to tear apart this feature, it can still bring flooding downpours to the region.
Widespread rainfall totals of 50 to 100 mm (2 to 4 inches) are expected, but in areas where the heaviest downpours occur, rainfall totals can reach 100 to 200 mm (4 to 8 inches). An AccuWeather Local StormMax™ of 300 mm (12 inches) is possible in the higher elevations.
Flash flooding and mudslides will be a concern across much of the region.
Rain will spread farther west into Cambodia and southern Laos late in the day on Thursday as the storm continues to dissipate.
After a short break in the wake of the storm, spotty showers and thunderstorms will return to Vietnam through the end of the week as recovery efforts begin.
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