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Here's a diagram that puts it all together. Follow us on Twitter. Sleet falls as ice pallets and can be found bouncing off the wind-shields or the roof during the winters. It originally falls as snow, but after reaching a warm layer of temperature, it melts and takes the form of rain. However, after exiting from this warm layer, the raindrops reshapes into pallets of ice as they enter the next cold layer near the surface of the Earth.
Freezing rain refers to those rain droplets which freeze upon hitting the surface of ground. Freezing rain falls into a shallow layer of cold air which is present near the ground surface. It leaves a glaze coating. It is important to mention that it falls just like normal rain, and it only takes the frozen form on contact with any type of surface on Earth like trees and power lines.
Freezing rain also starts with the same set-up as snow. However, after entering a warm layer, the snowflakes melt and take the form of rain.
Unlike sleet, it does not get time to refreeze and thus ends up falling as rain drops. Thus, all three forms of precipitation can be easily differentiated. Snow falls through cold air and reaches the surface. Sleet is the frozen precipitation which melts in thin warm air and then refreezes again before hitting the ground. Freezing rain is also a type of frozen precipitation but it melts in the warm air and freezes again only after coming in contact with cold surfaces.
Where the forecast gets complected and in my opinion, one of the hardest to forecast is when we get into a freezing rain and sleet event. There is a little bit more that has to happen to create either modes of those precipitation types.
In typical situations, temperatures usually cool with height. The difference is how deep of shallow the colder air is near the surface.
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