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Bandung –
The Agency for Meteorology, Climatology and Geophysics (BMKG) said that the floods in the city of Bandung, West Java, occurred due to the high intensity of rain since Thursday (12/24) from 16.00 WIB to 20.00 WIB.
BMKG Class I Bandung chief Tony Agus Wijaya said the heavy rains were caused by significant alterations in wind patterns. As a result, the clouds gathered in Bandung City and there were heavy rains.
“There is a significant disturbance in the West Java region causing a slowdown in the air mass in West West Java. This condition supports the growth of rain clouds, even in the West Java region,” Tony told detikcom, Friday (12/25/2020).
In addition, he noted that the wind distribution pattern on December 24, 2020 at 00.00 UTC, generally the winds passing through the West Java region are dominated by winds from the southwest to the northwest.
“The wind pattern is influenced by the dynamic conditions of the air layer, which is always changing. And now is the rainy season, leading to the peak of the rainy season in January,” he said.
Based on Stageof Bandung Automatic Weather Station (AWS), the rainfall in Bandung city reaches 83 millimeters with very heavy (extreme) rain intensity. Various local factors were also mentioned as the cause of the heavy rains.
What is understood by local factors is the level of humidity in the air. At the time of the incident, the growth process of rain clouds is faster. The humidity of the air is humid enough that there is an increase in the growth activity of convective rain clouds with dense types of Cumulus and Cumulonimbus causing moderate to heavy rainfall.
The humidity level was recorded at 00.00 UTC in the city of Bandung, in layers of 850 mb, 700 mb, 500 and 200 mb ranging between 80 and 95 percent. Additionally, both Himawari satellite imagery records and weather radar images recorded significant growth of convective or Cumulonimbus clouds from noon to night.
“This condition is expected to cause flooding,” he concluded.
(mud / mud)
