For Sumatra SE tips :
No gale warning.
The reliability of the situation is good.
Overcast skies with storms likely in the morning, storms developing in the afternoon. Risk of showers in the morning, showers in the afternoon. In the evening, very cloudy with risk of storms.
Possibility of showers WNW force 2 becoming W force 3 in the middle of the day then WNW. Gusts reaching 16 knots in the middle of the day. Moderate sea. Low, fairly long swell from SSW. Visibility reduced by mist becoming good in the middle of the day then reduced by mist.