From 1 to 5 December 1930, a fog stagnated over the Meuse valley, stretching from Jemeppe to Huy. This accident partly occurred due to the morphology of the valley. Indeed, over one to two kilometers wide, the valley's height is 60 to 80 meters, while the top of the valley, that is, the plateaus on the right and left banks, reaches more than 200 meters in some places. During this first week of December, atmospheric pressure was extremely high, around 1030 mbar, and it was cold (0 °C during the day and as low as −10 °C at night) with a weak east wind, ranging from one to three km/h. This is referred to as a Temperature inversion.
From 1 to 5 December 1930, a fog stagnated over the Meuse valley, stretching, from Jemeppe to Huy. This accident partly occurred due to the morphology of the valley. Indeed, over one to two kilometers wide, the valley's height is 60 to 80 meters, while the top of the valley, that is, the plateaus on the right and left banks, reaches more than 200 meters in some places. During this first week of December, atmospheric pressure was extremely high around 1030 mbar, and it was cold (0 °C during the day and as low as −10 °C at night) with a weak east wind, ranging from one to three km/h. This is referred to as a Temperature inversion.