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Heavy Rain Forecasted for Kolkata on August 21, 2026
An automatic weather alert indicates heavy rain forecasted for Kolkata, India, on August 21, 2026. The forecasted precipitation has crossed the designated high-severity threshold.
An automatic weather alert has been generated for Kolkata, India, based on forecast data for August 21, 2026. The high-severity rainfall event is set to start at 00:00:00.000Z on that date.
According to internal forecast metrics from wweather1.com, the expected precipitation value is 30.1 mm. This figure surpasses the system's threshold setting of 30 mm for rain events.
The system issued the automatic notification after detecting that the forecasted precipitation value exceeded the established limit for the area on the specified forecast date.
Why it is dangerous and what to do
⚠️ Safety
• Monitor local weather updates for potential changes in rainfall intensity.
• Avoid driving or walking through waterlogged roads if heavy rain occurs.
• Keep rain gear accessible and secure loose outdoor items.
📊 The numbers, from wweather1 data
Kolkata: now +28°, Overcast.
That is 2° above the August climate norm.
The record for this date is +33° (2015).
Three-day forecast: 20 August: +32°/+27° · 21 August: +33°/+27° · 22 August: +33°/+27°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
Dhaka
now
☁️
+27°
Kolkata
now
☁️
+28°
Chittagong
now
☁️
+27°
Gazipur
now
☁️
+27°
Rasapūdipalem
now
🌙
+27°
Patna
now
🌙
+28°
📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.