According to Chief Sector (Kasubid) of Extreme Weather Meteorological Agency, Climatology, and Geophysics (BMKG), Kukuh Ribudiyanto said that extreme weather in Indonesia will last until next February.
Heavy rains accompanied by strong winds and high waves will likely still occur in many regions in Indonesia.
"We note the extreme weather in the form of rain accompanied by strong winds will persist in southern Sumatra, Jabodetabek, Banten, West Java, northern part of Central Java, southern part of Central Kalimantan, South Kalimantan and Southeast Maluku," said Kukuh on Monday (14/1).
Kukuh explained as for the high waves, still likely occurring along the northern seas to the west of Sumatra, the seas south of Java to Bali, to the East Nusa Tenggara (NTT), then the seas of Sulawesi and Borneo and the southern seas of eastern Indonesia.
He also mentioned that a lot of factors that affect the weather extreme conditions in Indonesia. "The first is the concentration of a very thick cumulonimbus cloud; occur due to the cooling effect on the atmosphere. It was triggered by extreme winter in the northern hemisphere where some places has temperatures up to minus 30 degrees Celsius," said Kukuh.
The current accumulation of cumulonimbus clouds can reach up to 17 km, which is 13 km normally. Accumulation has also been creating winds in some areas.
Other thing he said is due to tropical cyclones Narelle that has now moved away from Indonesia to the south-west Australia.
"But, despite those, this year’s monsoon which moves from the mainland of Asia is quite strong," said Kukuh.
He warns preparedness communities across Indonesia against extreme weather.
"It had not even reached the peak of extreme weather yet. From mid-January to February with potential rain accompanied by strong winds and high waves would reach the top," said Kukuh.
Meanwhile, Head of Data, Information and Public Relations of the National Agency for Disaster Management (BNPB) Sutopo Purwo Nugroho said they are anticipating various actions for flood in Jakarta and surrounding areas during the rainy season in 2012/2013.
"First, we have been coordinating with the ministries / institutions, local government and other elements in accordance with the Presidential Instruction on the prevention of floods and landslides. In addition, it has been done some technical coordination’s with the Central Region of Ciliwung Cisadane Ministry of Public Works, BPBD Jakarta Public Works Department and related agencies since October 2012, "said Sutopo on Monday (14/1).
Second attempt, according to Sutopo, the Contingent planning against floods and landslides nationwide have been prepared, where one of the priority areas are flood in Jakarta.
"Detailed contingency plan to cope with floods in Jakarta has been compiled. Contingency plans in the mapped flood prone areas, logistics capabilities and equipment, human resources, institutions, early warning systems, funding, and so on. Currently logistics and equipment has been brought closer to the flood points in Jakarta. BNPB have developed a device InaSAFE (Indonesia Assessment Scenario for Emergency) to analyze potential flood inundation, impact and logistics requirements needed to use in the worst case scenario of flooding in Jakarta," said Sutopo.
His team was ready for the worst that could happen. "In accordance with the reported potential BMKG Jakarta as a city with a relatively high concentration of rainfall during the beginning of January to mid-February, so we will be ready with the worst," said Sutopo.