Tuesday, 4 April 2017

HIKING THE WILDERNESS - LIGHTNING




Quathlamba
“A mass of Spears. Named thus by the Zulu warriors before the white man came. Today called the Drakensberg, Mountains of the Dragon, a name given by the Voortrekkers. Evocative names, both equally applicable to South Africa’s mightiest mountain range with its spear-like peaks – reminiscent of the saw-toothed spine of a gigantic dragon.”


Panorama April 1966





“Listen to the streams as they gurgle from their cradles and you will hear the story of the mountains. You will hear fascinating tales if only you listen! Lie next to a stream and listen to the song of the mountains. The smiling faces of the flowers, dancing in the wind. Venture into the remote valleys or stand on a peak at sunrise or sunset, after snow has fallen, and you will hear a song that you will never forget - the Song of the High Mountain".




DRAKENSBERG WILDERNESS PHOTOS © WILLEM PELSER










I SOLO HIKE THE WILDERNESS, NOT TO ESCAPE LIFE, BUT FOR LIFE NOT TO ESCAPE ME”

UNKNOWN












HIKING THE WILDERNESS
LIGHTNING

Of all the hazards that can best you in the wilderness, it is certain that being struck by lightning is one of the most terrifying. That bolt from the blue can zap you without warning, melting your boots to your feet and reducing you to a smoking heap. And it’s so hard to get away from, too – especially if you are high up or in the forest. Well, that does not have to be the case. One of the reasons why you should take an interest in the weather around you is so that you can avoid being on that knife-edge ridge in a thunderstorm.




Warning signs
   Your best source of information for thunderstorms and the menace of lightning is the weather forecast. And if storms are predicted for your area, amend your plans – it’s better to spend a few hours in the outdoor shops. If you do get caught out, there are a few steps you can take to avoid becoming toast.

   If you hear thunder or see lightning, don’t hang around for the rain to come, get to safety as quickly as you can. If you can hear the rumble of thunder the storm is probably only 10-16km away. You can see lightning a lot further off, usually up to 24km away, but in the hills your visibility and the sound of the thunder may be obscured and deflected by valleys and ridges. When you see the flash start counting. Stop when you hear the bang. Divide your result by 3 for a metric answer and by 5 for a distance in miles. If your result is between 5 and 8km, you are in the usual strike zone for lightning, and therefore most at risk.


Protect and survive
   The best places to shelter from the rain are often the worst places to avoid lightning. Tall trees are natural lightning conductors, but caves and overhangs too will conduct electricity around you and your body will act as a conducting core.

   If you are in a forest, see if you can find a patch of younger trees. If you’re on rocky terrain, see if you can find a boulder. Sit on your rucksack with your head down and your hands on your knees. You don’t need to throw out all your metal ware – lightning has bigger fish to fry than being drawn by your ice axe, walking poles, camera or crampons – but it may be sensible to lay them to one side. The middle of a well-drained slope is probably the best place to be.





Clouds
   If you take a little time to learn which clouds are associated with the different types of approaching weather you can impress your friends with forecasting prowess in the wilderness. If you only learn to identify two – learn cirrus, the high level, wispy clouds that precede a warm front and follow a cold one, and cumulonimbus, the angry thunderclouds which foretell severe weather.


Wind chill
   However cold the air temperature actually is, you will feel colder if there is also a wind blowing. Wind chill is the dramatic factor loved by news reporters because it sounds so dramatic: ‘Although the air temperature was just above freezing, wind chill on the remote farm saw temperatures plummet to -10! There can be no doubt that the wind chill is a killer – it’s a measure of how your body reacts to the conditions of cold air being blown against it. Freezing air will cause you more harm faster if it hits you at 50kmh! If the ambient temperature is -5 degree Celsius and there is a 20kmh wind blowing, the temperature will feel to you as if it is more like -12 degrees Celsius.





How does this affect the Wilderness hiker?
   You have to be prepared for the conditions you’ll find in the wilderness. It’s not just the case of checking to see if it’s going to rain. High winds can make ridge walking very dangerous. Snowfall can occur even in summer at altitude, rain will swell watercourses making route changes necessary, and poor visibility will slow you down, even if your navigation is Exocet-like.

   The moral is, keep your eye on the weather reports before you go. Get accurate forecasts, and understand how they will affect you on the ground in the Wilderness and Mountains.


The End.


Safe Hiking.




References and Acknowledgements

From the book – The Ultimate Hiking Skills Manual – Hinkes/Bagshaw

Photos: Willem Pelser
Compiled by Willem Pelser



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