BMKG Warns of Prolonged Rainfall Potential in North Sumatra

Medan — The Meteorology, Climatology and Geophysics Agency (BMKG) has warned the public to be vigilant for the potential of prolonged rainfall in parts of North Sumatra on Saturday, 23 May 2026. ‘Be vigilant for rainfall with light to moderate intensity that may persist for a long time in the mountainous areas, eastern slopes, eastern coast, and western slopes of North Sumatra, which could lead to floods, landslides, and other hydrometeorological disasters,’ said Forecast Analyst for BMKG Region I, Putri Diana, on Friday, 22 May 2026. She said that, in general, the weather in North Sumatra on Friday morning was predominantly cloudy with a potential for light rain in Labuhanbatu, Langkat, Labuhanbatu Utara, and surrounding areas. Meanwhile, during the afternoon to evening there is potential for light rain in Padanglawas Utara, Pakpak Bharat, Simalungun, Pematangsiantar, Langkat, Medan, Deli Serdang, Karo, Binjai, Serdang Bedagai, Batubara, Asahan, Labuhanbatu, Labuhanbatu Utara, Dairi, South Tapanuli, North Tapanuli, and surrounding areas. During the night there is potential for light rain in Padanglawas Utara, Samosir, Simalungun, Langkat, Binjai, South Tapanuli, Medan, Deli Serdang, Serdang Bedagai, Karo, Asahan, Batubara, Dairi, Labuhanbatu Utara, Labuhanbatu Selatan, Labuhanbatu, and surrounding areas. And in the early hours of the morning there is potential for light rain in Langkat, Labuhanbatu Utara, Labuhanbatu Selatan, Labuhanbatu, and surrounding areas. The average air temperature is expected to range from 14 to 33 degrees Celsius with humidity of 75 to 99 percent. Winds are forecast from the south to northwesterly at 4–7 kilometres per hour.