A local warning inside a dry-season country
BMKG's extreme-weather outlook for 14–16 September marked Aceh at Siaga for heavy to very heavy rain on 15 September. Other Indonesian provinces had lower warning levels or no listed warning on particular days. This is why a national dry-season headline is not a substitute for a provincial rain alert. Local wind and terrain can concentrate rainfall even while much of the country remains dry.
Forecast level versus observed impact
A Siaga listing identifies forecast potential; it does not confirm that a flood has already happened. The exact location and time of the strongest downpour can change. People in low-lying areas should check BMKG's newest warning and local emergency instructions if rain intensifies.
The linked BMKG table is updated regularly. This article records the 14 September view, so its warning dates should not be reused as a live alert after the period ends.