An automatic weather alert has been triggered for Colombo, LK, as rainfall forecasts for September 21, 2026, are expected to exceed designated safety thresholds.
According to automated forecast data from wweather1.com, Colombo is projected to experience a high-severity rain event starting on September 21, 2026, at 00:00:00 UTC. The predictive models indicate a total precipitation of 37.4 mm over the forecast period.
This forecast value of 37.4 mm crosses the established system threshold of 30 mm. Because the precipitation levels have exceeded this set limit, the event has been classified under a high-severity status.
The alert was generated automatically by the wweather1.com forecasting system. Residents in Colombo and surrounding LK areas are advised to stay informed as the weather event develops.
Why it is dangerous and what to do
⚠️ Safety
• Monitor local weather updates and official announcements regularly.
• Keep emergency contact numbers and essential supplies easily accessible.
• Avoid traveling through heavily flooded streets or low-lying areas.
• Ensure household drainage channels are clear of debris to prevent water accumulation.
📊 The numbers, from wweather1 data
Colombo: now +25°, Rain showers.
That is 1° above the September climate norm.
The record for this date is +30° (1984).
Three-day forecast: 20 September: +28°/+24° · 21 September: +29°/+25° · 22 September: +28°/+25°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
📰 Data source:
wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.