![]() ![]() Video: Visible true colour satellite images showing inland fog across parts of NSW, the ACT and Vic on Friday morning. The fog lasted for hours in some area before dispersing as the air warmed up. Source: / Instagramįriday’s first light revealed broad areas of fog and low cloud pooling in valleys across eastern NSW, the ACT and central and eastern Vic. The combination of clear skies and relatively light winds over southeastern Australia on Thursday night allowed temperatures to cool enough for fog to form. , 1:53PM UTC Feeling foggy this morning? You weren't aloneįog was widespread across southeastern Australia on Friday morning, with visibility reduced to 100m or less in parts of NSW and Vic. ![]() Unlike previous types of precipitation, hail is almost always associated with a thunderstorm. Hail, unlike other types of precipitation can vary in size significantly, from that of a pea up to baseball. These ice particles come in various shapes from round to irregular lumps, and can be transparent or opaque. Rounding out the last of the list is the all too familiar hail. Sleet forms when snowflakes, or frozen raindrops, partially melt as they fall, before refreezing before they hit the ground. Snow grains are less than 1mm in diameter whilst snow pellets are less than 5mm in diameter.Īnother form of precipitation that is more widely known is sleet (or ice pellets). Whilst these are both white or opaque they differ in that they fall from different types of clouds and are different sizes. Less obvious to identify are snow grains and snow pellets. Snow is white or translucent ice crystals with complex hexagonal shapes, often joining together to form snowflakes. Snow is first up, and the one most people can readily identify. This leads us nicely into our frozen precipitation. For those wondering what it's called if the raindrop is smaller than 0.5mm - freezing drizzle. When this drop hits a cold surface, it almost immediately freezes. If the cold layer under a cloud is too shallow for the droplet to completely freeze before it hits the ground, it instead hits the ground as a supercooled raindrop. ![]() The last of the purely liquid precipitation is freezing rain. To be classed as rain, a drop must have a diameter of 0.5mm or greater, with anything under this considered drizzle. Most people think of rain as any liquid drop falling from the sky, however there is a distinct difference between rain and drizzle, and that is in their size. For example, for snow or snow pellets to reach the ground a cold airmass is needed, such as that behind a cold front.Ī cold front moving over the southeast on Tuesday 16th May Which of these we experience on the ground is determined by how raindrops and snowflakes are altered by atmospheric conditions as they fall. Whilst everyone knows the difference between rain and snow, some may not be familiar with differences between these and the other types of precipitation, so lets have a look at the main points that differentiate them from each other. Snowfall is just wintery type of precipitation, with sleet, snow grain, and snow/ice pellets all various other forms of precipitation we can expect more of through the colder months. With winter approaching and the cold weather already beginning to make its mark, we have already seen our first snowfalls across parts of the Alpine region. There are many forms of precipitation that can fall, some more frequently than others and some of which can easily be confused with others.
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