Virga

Virga2

A cold front passed through North Texas today around 12 noon. A line of high clouds and some light wind marked the passage of the front. Is it just me, or do sounds become more acute just before a front passes? Just like rain has a smell, fronts seem to amplify sound. Could that be due to the density of the air increasing prior to passage?

Anyways, back to Virga. The high clouds featured some beautiful high-altitude, wispy virga; something you don’t see too often in Texas. Virga is more common in  higher-altitude, Virga1drier regions. In meteorology, virga is an observable streak or shaft of precipitation that falls from a cloud but evaporates before reaching the ground. At high altitudes the precipitation falls mainly as ice crystals before melting and finally evaporating; this is often due to compressional heating, because the air pressure increases closer to the ground. It is more common in the desert and in temperate climates. In North America, it is commonly seen in the Western United States and the Canadian Prairies. This is why you witness it more in Colorado than Texas. I look forward to getting better and more frequent pictures of virga soon!

Virga3

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