meteorology

The deluge of rain and snow in eastern Nepal, where Everest is located, in early October was also because of the westerly disturbance, officials at Nepal's meteorology department said.

"It's the result of a rare 'atmospheric tango' between the monsoon and the westerly disturbance," said Akshay Deoras, a research scientist with the department of meteorology at University of Reading in the UK.

Commenting on the heavy rains, Ester Brito from the country's meteorology institute told Reuters news agency that the weather conditions were uncommon.

But the answer also lies in the tricky nature of meteorology.

"The observatory is astronomy, it is also meteorology, and after many years I feel like I'm part of the brickwork."