The wonder of watching distant storms

 Here is something I discovered towards the end of the last storm season. Sometimes the best storms to watch are not necessarily those that are directly overhead or approaching your location. Not at all. Sometimes the best storms to watch are those that are at a distance, too far away to have any effect on your location. 

One particular day always comes to mind. That day was Saturday the 9 March 2013. On this day, there were no storms in Pretoria itself. In fact it was a clear and sunny day over the city for pretty much whole day, with no rain at all. 

The early stages of what was to become one of the best storm watching days of my life

It all started just before 16:30 early that evening when a storm developed to the far east of Pretoria. It developed very quickly into the explosive billowing cumulonimbus cloud in the above image. But even this was still early days. The grand finale of the day was still to come. But I will come to that part a bit later.

Another line of clouds began developing to the NE and also grew into a mass of cumulonimbus that heralded something big about to happen.

  

http://www.youtube.com/watch?v=WnHZTIh7Rew , http://www.youtube.com/watch?v=l7At8jJkjec

The two above links are of the two storm systems a bit later in their development. They also include a third separate storm that developed much later but would also develop it's own amazing characteristic. The day would eventually end with one of the most spectacular arrangements of storms I've ever seen. Three storms, one to the south, another to the east and the other slightly to the north. Pretoria was almost basically surrounded on three sides by storms (although they were some distance outside the city, with the one to the east confirmed to be not far from the town of Ermelo in Mpumalanga). http://www.stormchasing.co.za/forums/weather-photographs/8636-pretoria-surrounded-by-storms-9-march-2013
 But what particularly made this set up so exciting was the fact that one of the storms was a possible supercell thunderstorm.

The mammatus storm to the east

The above storm, which I call the mammatus storm, developed from the billowing cumulonimbus formation in the top image. I shot the above photo about two hours after the top one. By then, it had developed a spectacular mammatus formation under it's anvil, which was a beauty to watch. The photo does not really do it much justice as I shot it with my camera phone fully zoomed in. That mammatus was truly breathtaking, even from that distance. I can only imagine what it must have been like for those directly underneath it.

The anvil storm to the south

I think it is quite clear why I call the one above the anvil storm. Just look at how stunning that anvil is. This didn't look like it was a particularly big storm but man that anvil was absolutely gorgeous and such a joy to watch. This began developing  bit later to the south about an hour after the other two storm systems had began developing. It seemed to be the least organised of the storms and looked mostly wispy at the beginning of it's development. The photo below is the anvil storm about 40 minutes before the above photo. At this point I was still largely focused on the other two storms systems which at this point were at a very interesting point in their development. It's just as well that it really began to take shape just as the sun was setting and I was treated to the beautiful sight in the above image.

The anvil storm in the early stages of it's development.

The possible supercell storm to the north

And saving the best for last. The storm above was the giant of the three. This was clearly the biggest of the three storms. It was imbedded within a line of clouds that formed in the north and northeast and only took its later form about 2 hours later.

The possible supercell about 2 hours earlier. It quite amazing to imagine that a few hours later this became the storm in the image above it.

I watched it develop and separate from the rest of the cloud and become a storm on its own. And boy did it. While I am aware that it is very difficult to tell whether a storm is a supercell simply from observing with the naked eye, this storm did seem to display all the hallmarks of a supercell thunderstorm. From the large overshooting top, to the the anvil that spread far ahead of the main updraft area, to the cumulus clouds along the side of the main cumulonimbus structure, an indication of a flanking line, a typical characteristic of a supercell thunderstorm. All these factors indicated that this storm could be a supercell.

Either way, watching storms at a distance is such a joy. Seeing the clouds develop and grow from little puffy cumulus clouds to towering, billowing cumulonimbus clouds in a matter of a few hours is an experience that is difficult to describe in words. And the neatest part? You don't get wet and the chances of being struck by lightning are almost zero. It's therapeutic too, serene almost.