Gathering Storm 1
See also Gathering Storm 2 - the next shot in my stream.
Sydney, Australia. Looking south west from home across Neutral Bay towards Kirribilli and the Sydney CBD, at 7AM on this Saturday morning as a storm was gathering.
The cloud shape (Cumulonimbus) indicates a sharp localised drop in barometric pressure, and the flags on the Sydney Harbour Bridge can be seen to be flying towards the low, because air is being sucked from the higher surrounding atmos pressure into the low (the Bernoulli effect).
The storm's bark was worse than its bite. The wind got up to about 30 knots, but nothing much else happened. Very few people went sailng, either on the harbour or offshore.
We had a curry and a bottle of red.
Fierce looking weather fronts are not unusual in Sydney.
Those with good eyes and a clear monitor (and desperate) may be just able to see the tip of the Opera House roof directly below the tallest building in the image.
ISO 200, 1/30 sec, f4