SAMARINDA - The Meteorology, Climatology and Geophysics Agency (BMKG) of the APT Pranoto Samarinda Meteorological Station invites residents of East Kalimantan (Kaltim) to be aware of the potential for hydrometeorological disasters, in line with the forecast of moderate to heavy rain on December 3.
Hydro-meteorological disasters such as floods, rivers overflowing, slippery roads, landslides, and the possibility of trees falling due to rain are potentially accompanied by strong winds and lightning. This early warning is conveyed so that all residents and related parties are alert.
"Based on the forecast of the potential rainfall on December 3 or on the 10th of December, in general, the Kalimantan region is predicted to experience rainfall with medium to high intensity," said Head of the Class III Meteorological Station Aji Pangeran Tumenggung (APT) Pranoto BMKG Samarinda Riza Arian Noor in Samarinda, Antara, Monday, December 22.
In the forecast of rainfall opportunities on December 3, 2025, it is shown that in general the Kaltim region experiences rainfall with a medium category of 50-150 millimeters (mm) with a rainfall chance of more than 70 percent.
Meanwhile, the western Kalimantan region, especially the northern part of Kutai Kartanegara Regency, the western part of East Kutai Regency, and the western part of Berau Regency, is expected to experience high-category rainfall between 150-300 mm with a chance of rain ranging from 50 to 70 percent.
For the deterministic rainfall forecast on December 3, most of the provinces in East Kalimantan are predicted to experience rainfall with a medium category of 50-150 mm.
Meanwhile, some of the northern Kutai Kartanegara Regency, the western part of East Kutai Regency, and the western Berau Regency are estimated to experience rainfall with a high category of 150-200 mm.
Then, in the deterministic forecast of the same daily rainfall characteristics, it is shown that the Kaltim region is predicted to experience varying rainfall characteristics, generally with a normal category of between 85-115 percent.
Meanwhile, some areas of the northern Kutai Kartanegara Regency, the western part of the East Kutai Regency, and the western Berau Regency, are predicted to experience rain with a normal upper category of 116-150 percent.
"For most of the areas of Paser Regency, West Kutai Regency, a small part of the area of Kutai Kartanegara Regency, North Penajam Paser Regency, and Mahakam Ulu Regency, it is estimated that it will experience rain with a normal category of 50 - 84 percent.
The BMKG APT Pranoto Samarinda Meteorological Station also revealed the results of monitoring the day without rain (HTH) on December 2, 2025. Although in general the Kaltim region experienced rain, there were also areas that did not experience rain for several days.
"Several areas in East Kalimantan experienced HTH with a very short category of 1 - 5 days. The longest HTH occurred in North Bontang District, Bontang City, with a total of three days of HTH," said Riza.
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