Here is a list of 5 beautiful yet weird weather phenomenon that are observed in India. Although they are also observed worldwide, but I have mentioned them with respect to Indian subcontinent. The first one was observed very recently.
- Wave Clouds
Usually observed near the mountainous areas with parallel bands of clouds separated by empty spaces creating a beautiful rippled panoramic view.
REASON: The main contributing factor for the formation of such clouds is an obstruction – of a high mountain or a rock or a building. When the stable air flows through a high mountain it undergoes wave formation. If the air has moisture in it, then you’ll probably witness the beautiful waves in the sky just like someone has thrown a pebble in the water. The different heights in the atmosphere have different temperature variations and the warm air always try to ascend to the upper atmosphere. During the formation of the waves, the warm air after striking with the mountain sinks in and then tries to move upwards over cold air because of its natural behaviour. The moisture condenses and forms the Altostratus clouds in the cooler crests of the waves and evaporates away from the warmer, descending ones forming bands of alternate clouds.
- Halo around Moon
Observed during a full moon phase when a ring encircle around it which appear as an alien effect.
REASON : When the moonlight or the sunlight passes through cirrostratus clouds, thin transparent clouds formed above 18000 ft composed of ice crystals, striking through those ice crystals refract to the earth surface then a ring of rainbow colours can be observed around the moon or the sun. It is seen at exactly 22 degree angle of an observer with the clouds. The emergence of a halo also gives an indication of an upcoming heavy rain and thunderstorm laden by the cumulonimbus clouds.
- Red glow during dusk or dawn
The entire sky and the clouds above wrap up themselves in a rare and magnificent blanket of pink or orange light, giving a treat to the eyes.
REASON : After the sun sets or before its rising, the sunlight (dominated by red and far red wavelengths) sometimes strikes over ice crystals or particulates or aerosols and get reflected and scattered around in the atmosphere, enveloping everything around in a pinkish or orange glow. The phenomenon is also called as the Belt of Venus, Venus’s Girdle or Anti-twilight Arch.
- Phantom Rain or Virga
Heavy rainfall falling from the clouds but the ground remain unwet and it appears as if our eyes are deceiving us.
REASON : This phenomenon is observed either in the deserts or in temperate higher altitudes. When the ground temperature and pressure is higher than the above atmosphere then the rain water gradually evaporates in the mid air before even touching the ground, making the moment look extremely weird.
Extreme rainfall/downpour at a specific place in a short time period calling upon extreme floods and landslides.
REASON : The cloudbursts are caused by the heavily moisture laden cumulonimbus clouds which store massive amounts of water and extends from the ground level to a height of upto 50,000 ft. Sometimes these types of clouds stop moving forward because of stable wind flow or an obstruction (generally high mountains obstructing the wind movement from all three sides). Then they start down pouring and emptying themselves at that specific location and within few hours they result into heavy floods, landslides and destruction.