There were yesterday, the top Flemish-Brabant and East-Flanders special cloud formations to see. It went to so-called ‘pilotengaten’, also known as a ‘fallstreak hole’.
Weatherman Frank Deboosere gave an explanation in the weather. “When a pilotengat is a plane through the clouds and flown. The clouds consisted of supercooled droplets, and these droplets verdampten and were instantly ice crystals. That has to spectacular holes in the clouds led.’