In a Facebook post on Monday evening, the Thai Meteorological Department said: “When cumulonimbus clouds move quickly, they could generate arcus clouds, or a low, horizontal cloud formation expanding from rain clouds and can be seen from several kilometres away.
“The rain clouds on Monday morning formed above Chachoengsao and moved east to cover the Greater Bangkok area. Their thickness blocked most of the light from the sun. The clouds were so thick and dark that the sky looked like it was night,” the post read.
Marine biologist Thon Thamrongnawasawat put this cloud phenomenon to global warming.
“With oceans getting warmer, more vapour is being released into the air, which is forming thick clouds that hold a huge amount of water,” he said in a Facebook post. “These clouds are thicker than usual and could bring heavy downpours….
