BMKG has issued an early warning regarding extreme weather which is expected to hit a number of regions in Indonesia. This warning mainly reminds of the potential for heavy rain, lightning and strong winds which are expected to occur on Wednesday (8/5) and Thursday (9/5).
The cause of this extreme weather is the presence of Tropical Cyclone Seeds 91P and 91W which were observed in the Arafuru Sea and the Pacific Ocean north of Papua. These two tropical cyclone seeds formed an area of slowing wind speed (convergence) around the area, which also triggered an increase in wind speed of more than 25 knots (low level jet) in the Arafuru Sea and waters north of Papua.
Cyclonic circulation is also observed in the Malacca Strait, Banda Sea, and the northern waters of West Kalimantan, forming a convergence area around northern Sumatra, West Kalimantan, and the Banda Sea. Apart from that, this cyclonic circulation also creates areas where winds meet on the west coast of North Sumatra to West Sumatra, as well as North Sulawesi to North Maluku.
BMKG’s forecast regarding areas that have the potential for heavy rain, lightning and strong winds on 8-9 May 2024 is as follows:
Wednesday, May 8, 2024:
- Areas with potential for heavy rain, lightning and strong winds: Aceh, North Sumatra, West Sumatra, Riau, Riau Islands, Jambi, South Sumatra, Bangka Belitung Islands, Lampung, West Kalimantan, Central Kalimantan, North Kalimantan, East Kalimantan, North Sulawesi, Gorontalo, Central Sulawesi, West Sulawesi, South Sulawesi, Southeast Sulawesi, North Maluku, Maluku, West Papua, Papua.
- Areas with potential for rain, lightning and strong winds: Banten, West Java, DKI Jakarta, East Java, South Kalimantan.
- Area with potential for strong winds: East Nusa Tenggara.
Thursday, May 9, 2024:
- Areas with potential for heavy rain, lightning and strong winds: Aceh, North Sumatra, West Sumatra, Riau, Jambi, South Sumatra, Bangka Belitung Islands, Lampung, West Kalimantan, Central Kalimantan, North Kalimantan, East Kalimantan, North Sulawesi, Gorontalo, Sulawesi Central, South Sulawesi, North Maluku, Maluku, West Papua, Papua.
- Areas with potential for rain, lightning and strong winds: Riau Islands, Banten, West Java, DKI Jakarta, East Java.
- Area with potential for strong winds: East Nusa Tenggara. (Z-10)
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