Vous avez déjà entendu parler de l'orage de neige ? ⚡❄️ C'est exactement ce que cela semble être : un orage, mais avec de la neige au lieu de la pluie ! Ce phénomène rare se produit lorsque de l'air chaud s'élève dans un nuage orageux froid, créant des éclairs et de fortes détonations en plein milieu d'une tempête de neige. Et ce n'est qu'un des tours météorologiques les plus fous de la nature ; il y a aussi les tornades de feu, la pluie de sang et même la foudre en boule, qui ressemble à une sphère lumineuse flottant dans le ciel. Certains de ces phénomènes ressemblent à de la science-fiction, mais ils sont bel et bien réels à 100 % ! Restez dans les parages pour découvrir les événements météorologiques les plus fous que vous n'auriez jamais soupçonnés ! 🌪️🔥❄️ Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
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Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
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FunTranscript
00:00A strong snowstorm breaks out. Then, you start to hear a distinct thunder sound and have sparkles in the sky.
00:08Congratulations, you are one of the few people to have witnessed a snowstorm.
00:13Until recently, scientists were not even sure that it was a real phenomenon.
00:18But now, as more and more videos of this phenomenon appear online, they are trying to understand how these storms are formed and what their real danger is.
00:28One thing is for sure, if you see a lightning during a snowstorm, it is that there is at least 15 cm of snow falling somewhere nearby.
00:36We can even predict strong thunderstorms with snowstorms, but it does not work the other way around.
00:42All the heavy snowfalls do not cause such storms, and scientists are still wondering why.
00:48They think that this beautiful natural event occurs in a similar way to summer storms.
00:54Turbulences in the air raise the hot and humid air near the ground very high in the sky.
00:59As it rises, it cools down and forms clouds filled with tiny crystals of ice, overflowed water and gravel.
01:07When these elements collide inside the cloud, they create an electric charge that causes lightning and thunder.
01:14When it is cold enough for it to snow, the atmosphere does not have as much energy as in summer.
01:19Indeed, the ground does not heat up as much in winter, so there is less heat and humidity in the air.
01:25And there is less water overflowing in the clouds than during a summer storm.
01:31When the right conditions are met, it is usually near large American lakes that this phenomenon occurs.
01:37In these places, the cold air at an altitude mixes with the hot water of the lakes.
01:43This great difference in temperature creates areas where the air rises rapidly.
01:47And these pockets of rising air can cause lightning and thunders during heavy snow storms.
01:53They are also more frequent in the front chain of Colorado and in the high plains.
02:01Another difference between snowstorms and ordinary summer storms is that they are much more difficult to detect.
02:09Snow absorbs sound waves.
02:12So you can only hear the thunder if you are a few kilometers from its source.
02:17It will look more like a deaf rumbling than a powerful and lively blow.
02:22And it is more difficult to see a lightning on a white sky background bursting with flakes.
02:27Thus, snowstorms can take you by surprise and hit you like a regular storm.
02:34However, lightning and thunders that accompany a snowstorm are generally less frequent and less intense than those accompanying summer storms.
02:42Thus, the worst with snowstorms is probably the heavy snowfalls that can cause chaos on the roads and deprive you of electricity for days.
02:52Another rare and impressive winter meteorological phenomenon is the snowball.
02:57Nothing to do with pastry or Asian cuisine. It looks more like a wheel or a snow-covered tire.
03:03You will find these natural formations quite rare in the open prairies of North America or in some remote areas of northern Europe.
03:10For them to form, the conditions must be perfectly united.
03:14First of all, there must be a layer of wet snow on the ground.
03:18The snow must not adhere to the surface, as with ice or very light powder.
03:25Then, a strong but gentle wind where gravity must push the snow just as it should.
03:31As it moves, the snow rolls like a carpet and forms a big bath with a hole in the middle.
03:39Have you ever heard of red lightning, which is also called lightning bolt?
03:43Unlike ordinary lightning that strikes the ground from the clouds, these flash towards the atmosphere, about 80 km above the planet.
03:52They are extremely fast and last only a moment, which makes them very difficult to spot or study.
03:58Flashes are due to an accumulation of electricity in the clouds, just like normal lightning.
04:03They are generally red and can look like jellyfish or carrots and reach up to 48 km wide.
04:12Airplane pilots sometimes see them when they fly at very high altitudes.
04:17Unfortunately, they are not visible from the ground.
04:20Scientists think that flashings occur on all planets that have an atmosphere.
04:26They tested this idea in a laboratory by recreating the atmospheres of these planets and passing electricity through them.
04:33Their hypothesis proved to be accurate.
04:35A cavum is a large circular or oval opening that sometimes appears in certain clouds.
04:40These types of clouds float high in the sky and are often made up of tiny droplets of colder water than the freezing point, but have not yet frozen.
04:49They need ice crystals for this.
04:51When an airplane crosses the cloud, it can bring it these ice crystals.
04:56Once there, the droplets of water freeze quickly, thicken and begin to fall from the cloud.
05:03This creates a hole and, as other droplets freeze nearby, the hole enlarges and its edges extend.
05:11They are called dust whirlwinds, mini-tornadoes, which raise a lot of dust and dirt over time.
05:18They are small whirlwinds filled with tiny debris, and they can occur anywhere in the world.
05:25They are smaller and less powerful than regular tornadoes, but they can still be powerful enough to overturn small objects or lift light objects in the air.
05:36In very hot desert areas, they can be much larger and last longer, sometimes more than an hour.
05:43Dust whirlwinds are formed by sunbeams when the ground becomes very hot.
05:49Once the dust whirlwind has picked up speed, it behaves like a chimney, raising the hot air and lowering the cooler air in the middle.
05:58Dust whirlwinds can be dangerous if they are powerful enough.
06:02It is therefore preferable to stay away.
06:06Have you ever seen a white arch?
06:08They form in the same way as ordinary colored rainbows, but they are much larger.
06:13White arches are formed by tiny droplets in the fog or clouds, instead of big raindrops like in classic sky arches.
06:21But they also appear opposite the sun.
06:24You can therefore observe a white arch in a thin fog when the sun shines.
06:29It is possible to see one when the sun begins to pierce the fog, or if you are near the ocean, where the fog often forms.
06:37As the droplets of water in the fog are tiny, white arches do not have the usual bright colors of the rainbow.
06:44They can even be entirely white and very pale.
06:48Some white arches are difficult to see at first because they melt in the fog.
06:53But once you know how to spot them, they are easy to recognize.
06:58There are atmospheric rivers that flow high in the sky.
07:02They are long and thin streams of air in the atmosphere that carry a lot of water vapor.
07:07Even if you can't see them, they sometimes contain as much water as the Mississippi River carries in a day.
07:14When these celestial rivers reach the earth, the water vapor they contain often turns into rain or snow.
07:22Some are soft and useful, bringing water that dry regions need.
07:27But the biggest and most powerful can cause strong storms of rain or snow.
07:33If they stop moving above certain regions, they can cause floods, landslides and other problems.
07:41One of the most famous atmospheric rivers is called the Pineapple Express.
07:46It takes its name from the hot and humid air it carries from the tropical regions near Hawaii to places like the west coast of the United States.
07:55Mammoths are among the strangest and coolest clouds in the sky.
08:00They look like large pockets or bubbles.
08:04Their shape can vary a lot.
08:06Some look like smooth bubbles, others stretch like long tubes.
08:11Mammoths are generally formed under large thunderstorms.
08:15Inside these thunderstorms, strong winds cause turbulence
08:20which pushes the air and humidity down instead of bringing them up like in ordinary clouds.
08:25This creates these irregular shapes and pocket shapes.
08:29As mammoths are linked to powerful thunderstorms, they are often signs of bad weather, heavy rain, hail or lightning.
08:38In winter, if it's cold enough, they can sometimes bring snow.
08:42Sometimes they appear with other clouds, quieter, but it's quite rare.
08:48The best time to see mammoths is when the sun is low in the sky, for example at dawn or dusk.
08:54The sunlight illuminates the pockets, making them shine and even more impressive.