Central Singapore
Novena weather
Central city-fringe. Urban heating plus typical inland afternoon convection.
How rain usually arrives here
Novena is city-fringe: urban heat plus inland convection. It often matches Toa Payoh and the City more than the east coast. A stalled afternoon cell over the central area is the flood-watch setup.
After lunch in April, May, October and November, use the 2-hour nowcast and the 50 km radar together. The island 24-hour line is too coarse.
Central Singapore
Central towns sit on the inland heating plateau and against the catchment. Inter-monsoon afternoons are thunderstorm country. A stalled red cell over Toa Payoh or Bishan is the usual flash-flood setup.