What if it raining channel 4

Sign in to play Britain's Wildest Weather Britain's Wildest Weather Jaw-dropping on-the-spot footage oft the most extraordinary weather of the year. First shown: Sat 5 Dec 47 mins. Britain's Wildest Weather 's extraordinary weather, from record-breaking heat and rain to an avalanche in Wales.

Designed by BAE Advanced Technologies, its purpose was to analyse the ionosphere, a region of the upper atmosphere, with the aim of developing better radio communications technology. HAARP was a target of conspiracy theorists, who said it was used for weather modification, to cause earthquakes, tsunamis and the disappearance of Flight MH The Russian government is said to have used rain prevention methods since Soviet times, seeding clouds three times a year during Victory Day, City Day and Russia Day.

Ahead of each public holiday, the Russian Air Force often dispatches up to 12 cargo planes carrying loads of silver iodide, liquid nitrogen and cement powder to seed clouds above Moscow and empty the skies of moisture. Episode 5. Episode 6. Episode 7. Episode 8. Dr Louis from Dublin thinks so. Episode 9. However, if rain falls for long enough, the temperature of the air will start to fall. This is because water from rain drops will start to evaporate and cool the air — just like the process of evaporating sweat on your skin cools you down in summer.

So as you can see, the temperature is crucial as to what falls from the sky, with even half a degree making a huge difference. The height of a location above sea level is another highly influential factor on the likelihood of snow.

In most cases, the higher up a hill or mountain you go, the colder it gets — roughly by 1C for each metres. This is why snow is always more likely over hills and mountains than lower down. What you may be surprised to know is by how much the chance of snow increases with altitude. If there is a 20 per cent chance of snow at sea-level, this rises to 35 per cent at m, 60 per cent at m and around 75 per cent at m.

This shows how a journey that travels over hills can start off as a rainy one, but can easily turn into a snowy one with a relatively small increase in altitude. Urban areas are renowned for being slightly warmer than rural areas during winter, due to the large amount of heat generated by city life — buildings, industry and transport. In some cases, this urban warmth can be enough to raise the temperature sufficiently to mean that sleet falls rather than snow.