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Jakarta, CNN Indonesia –
BNPB urged the public to be aware of hydrometeorological hazards during the next week, from November 21 to 27, 2020. The warning was issued based on predictions of extreme weather conditions BMKG which was released last weekend.
“These dangers can come in the form of floods, flash floods, landslides and high winds,” said the head of BNPB’s Center for Disaster Data, Information and Communication, Raditya Jati, in a press release on Sunday (22 /eleven).
BMKG’s extreme weather prediction appeared after monitoring the development of cyclonic circulation in the Indian Ocean west of Bengkulu and in the Java Sea south of Kalimantan.
This cyclonic circulation forms an area of convergence that extends in the waters of the north of Aceh, from the north of Sumatra to the western waters of Bengkulu, in the north of the Strait of Karimata, in the west of Papua to the south of Maluku, and from central Kalimantan to the Karimata Strait. South side.
“This condition may increase the potential for rain cloud growth around the cyclonic circulation area and along the convergence area,” said the BMKG statement received last Sunday.
BMKG analyzes the dynamics of the unstable atmosphere in the coming week to increase the growth potential of rain clouds in various regions of Indonesia.
“This condition is reinforced by the active Madden Julian Oscillation (MJO) phenomenon and the Rossby equatorial wave in Indonesian territory over the next week,” Meteorology Deputy Guswanto said, citing a statement from BMKG last weekend.
“Based on these conditions, BMKG predicts for the next week the potential for extreme weather and heavy rain that may be accompanied by lightning and strong winds,” he added.
BMKG predicts that at least 30 of Indonesia’s 34 provinces will experience the potential for extreme weather conditions and heavy rains accompanied by strong winds.
The thirty provinces are Aceh, North Sumatra, West Sumatra, Riau, Riau Islands, Jambi, Bengkulu, Bangka Belitung Islands, South Sumatra and Lampung.
Then Banten, DKI Jakarta, West Java, Central Java, DI Yogyakarta, East Java and West Nusa Tenggara. Then West Kalimantan, Central Kalimantan, North Kalimantan, East Kalimantan and South Kalimantan.
In addition, Gorontalo, West Sulawesi, Central Sulawesi, Southeast Sulawesi, South Sulawesi, Maluku, West Papua and Papua.
The four provinces not included in the extreme weather potential of the BMKG are Bali, East Nusa Tenggara (NTT), North Sulawesi and North Maluku.
“The public is advised to stay alert and watch out for potential extreme weather (tornadoes, heavy rain accompanied by lightning, hail, etc.) and the impacts it can cause, such as flooding, landslides, flash floods, puddles, high winds, downed trees and the road is slippery, “Guswanto said.
 The view when cloudy clouds covered the Jakarta area. (CNN Indonesia / Andry Novelino) |
Meanwhile, on Monday (11/23) morning, BMKG issued an early warning that heavy rains were occurring in the Jabodetabek area.
Meanwhile, in East Lombok, NTB, there was hail on Sunday afternoon. The hail was reported to have occurred around 3:20 p.m. WITA.
BMKG stated that the hail that occurred in the Montong Gading, East Lombok area was due to the formation of the Cumulonimbus cloud.
According to reports we receive from residents, it is true that there was hail in the Montong Gading area, East Lombok Regency, in the late afternoon, “said Prakirawan, Zainuddin Abdul Madjid International Airport (ZAM) Weather Station (ZAM) Levi Ratnasari.
He said that based on the results of the monitoring of radar and satellite images, it was observed that a convective cloud cover, that is, the Cumulonimbus cloud, was observed in the vicinity of the hail.
Levi said that the maximum temperature of Cumulonimbus clouds was observed to be very cold, reaching less than 80 degrees Celsius.
Note that cumulonimbus clouds or known as Cb clouds can form due to strong warming at the surface and unstable air in the region.
Levi added that the growth of Cb cloud tops can be more than six kilometers, where the content of the Cb cloud with a very cold upper cloud temperature of less than 80 degrees Celsius can produce ice grains.
Ice grains can fall to the surface also supported by surface temperature conditions in the region.
“When the temperature on the surface or on the ground is cold enough, the ice grains from the top of the Cb cloud can still fall as ice particles, so the resulting rain is ice grains,” said.
Typically, he said, hail occurs in a short time, but is followed by heavy rain accompanied by lightning and even strong winds.
On that basis, Levi appealed to the public to always be vigilant and recognize the weather around you if Cb clouds are observed, which are layered, cauliflower-black clouds. If that happens, the community is being asked to reduce their outdoor activities due to BMKG’s extreme weather forecast.
[Gambas:Video CNN] (between, child / wis)
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