In the mountains, there are often signs that lightning is imminent. The wind gets stronger and becomes gusty.The sky gets dark very quickly, and sometimes black if the storm is particularly violent.Click here to understand how a thunderstorm forms. Cumulonimbus clouds are a good indication of a thunderstorm and can be of an impressive size. Look at the clouds: Cumulus clouds, isolated dense clouds with clearly defined edges, can change into castellanus clouds – partial swelling and with a crenellated appearance – then into cumulonimbus storm clouds, often in the shape of an anvil.Generally speaking, there are several signs to look out for, but these are different depending on the kind of storm: Check the warning map on the MétéoFrance website to see if a storm is on its way. Storms can develop very quickly in the mountains, so any sign of lightning or thunder should be seen as a warning, even if it seems far away. How can you tell if a storm is on its way? A mountain lake under a sky full of dark clouds © Photo de Patrick Schneider on Unsplash If you suspect you have been affected by lightning, it’s wise to consult a doctor. Lightning can transmit current through the ground near an impact. Please note: one in three victims of lightning strikes does not survive, and those who do may suffer serious after-effects. The best advice is to avoid the mountains if there is any doubt about the weather and consider cancelling or postponing your trip for a day or two. If a storm is on its way, it’s best to be cautious and not take any unnecessary risks. IGN maps can help you find paths, huts or alternative routes – you can install the IGN apps on your phone. This will make it easier for you to alter your route or seek shelter if necessary. It won an award in 2019 for its contribution to protecting people in hazardous weather and can alert you in the case of a storm.Ĭheck the weather regularly before you head out, and again during your hike. Météorage is said to be a world specialist site for lightning detection. The MétéoFrance website has a useful mountain weather tab.ĭangerous thunderstorms are often predicted on the Keraunos website, run by the French Observatory of Tornadoes and violent storms. In the event of a storm in the mountains, it’s good to have a plan in place! Check websites that will give you precise information on the local weather situation over the coming hours. Is a mountain storm dangerous? What should you do to keep yourself safe? Here are some useful tips …Ĭheck the weather forecast before you set out It’s always a good idea to keep an eye on the weather forecast in the mountains © Photo Licence Unsplash+ Plan your exit You’re on holiday in the Alps and planning a hike in the mountains, you’re well prepared – your rucksack is packed and you’ve got food, clothes, walking poles, a map and GPS…īut even if you’ve checked the weather and everything looks good, the weather in the mountains can be unpredictable and there is a chance of stormy weather.
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