The relatively frequent occurrence of low cloud in the area of Embakasi Airport near Nairobi (Kenya) is a great hazard particularly to aircraft without automatic landing device. The desire was therefore that the flight direction and control staff receive early and reliable information of low cloud from the meteorologist. The great difficulty is evident from the fact that low stratus can form and also disappear very suddenly. Considerable and sudden local and temporal variations prevent the meteorologist from an exact forecast of the phenomenon. The statistical results worked out from more than five years of observations should provide a means to tackle the problem, but they appear not to be sufficient unless the actual state of the atmosphere in its lowest 200 metres near the airfield is taken into account as an additional aid for the forecast. Radiosounding from a site to the northeast and below the level of the airfield would be of more use than that from Dagoretti which lies downstream and at a greater altitude. This suggestion had been made when the difficulties with the low cloud forecast became obvious. In the months with predominant low cloud during the night and morning hours the meteorologist will be prepared to foresee the occurrence of low cloud but must be alert in the months with only sporadic formation. A forecast based on merely statistic results is then not sufficiently reliable, if not impossible.