Formation of stratocumulus which however later became cumulonimbus. A rain shower is very clear in the background. The cloud formation was due to an upper low over the Central Mediterranean. Several waterspouts to the north of Malta were also noticed. This was due to very light and cool prevailing wind contrasting with warm sea temperatures and combined with wind shear as can be clearly seen in the weather sounding. Though instability was low (only 160J per kg) local weather conditions might have enhanced the instability. The thumbnail waterspout photos are courtesy of the Maltaweathersite facebook page.