Central Singapore
Serangoon weather
North-central heartland. Classic afternoon-storm country in April, May, October and November.
How rain usually arrives here
Serangoon is classic inland thunderstorm country in the inter-monsoon. The nowcast here often flips after lunch while the 24-hour forecast still says “afternoon thundery showers” for the whole island. That island line is not precise enough.
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.