BMKG Says There Are 24 Rainy Season Zones In September 2023

Illustration of the rainy season (photo: dock. Antara)

JAKARTA - The Meteorology, Climatology and Geophysics Agency (BMKG) said, there are around 24 season zones (ZoM) or about 3.4 percent of the season zone that will enter the rainy season in September 2023.

"In September 2023, there will be around 24 ZoM; 3.4 percent will enter the rainy season, including parts of West Sumatra and southern Riau," said BMKG Deputy for Climatology, Ardhasena Sopaheliwakan, quoting Antara, Saturday, September 9.

Ardhasena also revealed that in October 2023, around 69 ZoM (9.9 percent) will enter the rainy season, namely provinces such as Jambi, northern South Sumatra, southern Central Java, parts of West Kalimantan, western Central Kalimantan, and most East Kalimantan.

In November 2023 there will be around 255 ZoM (36.5 percent) which will enter the rainy season, which includes South Sumatra, Lampung, mostly Banten, Jakarta, West Java, mostly Central Java, parts of East Java, Bali, a small part of NTB, a small part of NTT, North Sulawesi, Gorontalo, parts of Central Sulawesi, mostly South Sulawesi, northern North Maluku, and southern South Papua.

Furthermore, around 153 ZoM (21.9 percent) is expected to enter the rainy season in December 2023, including most of northern East Java, parts of NTB, parts of NTT, mostly Southeast Sulawesi, and parts of Maluku.

Meanwhile, from January to May 2024, around 22 ZoM (3.2 percent) is expected to experience the start of the rainy season. There are also around 50 ZoM (7.2 percent) that have entered the Rainy Season, while around 12 ZoM (1.7 percent) is an area with a rainy season throughout 2023.

In addition, there are 113 Zones (16.1 percent) which are included in the ZoM 1 Season type, which has the characteristics of the season once throughout the year.

"In general, the rainy season is predicted to come later, which occurs in around 446 ZUM (63.8 percent) throughout Indonesia. A total of 22 ZoM (3.2 percent) is predicted to experience an early or forward start of the rainy season. And, there are also around 56 ZoM or about 8.0 percent of Indonesia's territory which is predicted to experience the same beginning of the rainy season as its climatological average," he explained.

The 2023/2024 rainy season itself, continued Ardhasena, is generally predicted to be normal, which occurs at around 566 ZUM (80.9 percent). However, there are several areas that are predicted to experience a rainy season with normal upper properties (rainfall higher than average) of 69 ZUM (9.8 percent), and areas that are expected to be below normal as much as 64 ZoM (9.1 percent).

Regions that are predicted to experience the rainy season with properties below normal include a small part of North Sumatra, southern Lampung, a small part of Banten, a small part of West Java, eastern Central Java, southern East Java, parts of West Kalimantan, parts of East Nusa Tenggara (NTT), northern Central Sulawesi, southern West Papua, and western Papua, "he added.

Meanwhile, areas that are expected to experience a rainy season with properties above normal include southern Aceh, northern North Sumatra, northern Riau, southern West Sumatra, northern Jambi, northern Bengkulu, western South Sumatra, southern Banten, southern Central Sulawesi, and southern Southeast Sulawesi, added Ardhasena.