Every 2 minutes Window reads NEA's lightning detectors, rain radar and rain gauges around Sengkang. It tells you when a thunderstorm is closing in and roughly when it will arrive, when to stay indoors because lightning is within 10 km, and when rain is likely in the next two hours.
Haze for Sengkang comes from NEA's East region monitors (24-hour PSI and 1-hour PM2.5). The nearest rain gauges are Compassvale Lane (0.8 km) and Sengkang East Avenue (0.8 km).
Alerts for Sengkang on Telegram: @WindowSingaporeBot. A heads-up before storms and when haze turns unhealthy; nothing for maybes.