Mountain weather
Mountain weather is notorious for rapid changes that can catch many climbers by surprise. However, by understanding some simple rules that remind us of the power of nature the risk is reduced.
Consider carrying an altimeter-barometer which is a useful short term weather prediction system. Any significant rise or fall over a number of hours can indicate changing weather patterns and be your first warning.
The more rapid the change in the pressure (a fall in pressure - which shows as a rise in altitude) the more likely the storm is to be a violent one.
It is also worth noting that the worlds highest peaks are hammered by high speed winds referred to as the jet-stream. The greatest danger in these winds that can exceed 160 kmph (100mph) is lack of respect.
Lightning is another natural hazard that needs to be understood by all climbers. Lightning is a build up of electrical potential in rainclouds that often form above the peaks and ridges on mountains. The electrical build up is a result of electrons rushing past each other or past the earth. The build up of electrons creates an imbalance which by the sheer laws of nature seeks to balance itself.
The imbalance of electrons will seek to discharge itself through a path of least resistance. For climbers if hair stands on end or it metal equipment starts to sing evasive action should be taken, as this MAY indicate a potential build up of electrons seeking to discharge, or strike!! The following tips are useful to remember if you feel that you are in a lightning strike zone.
- Avoid gullies and moist areas in general
- Sit or crouch on a kit page or coiled rope
- Stay away from the 'top' and ridges
- Move away from metal objects (which intensify a strike)
- Learn EAR (expired air resuscitation) and CPR (cardio-pulmonary resuscitation) techniques