What is Virga you may ask? It is simply rain that does not quite make it to the ground. It is caused by a layer of moist air in the atmosphere situated over a layer of very dry air. With this setup, today it was literally raining over us, but was so dry near the ground that it never quite made it!
Weather buffs may have heard of a meteogram, but for those of you that haven’t, it is an image of our atmosphere as if you were looking at it sideways. Time is along the bottom, and elevation is along the sides. I included a picture of our atmosphere represented this way in this post. For our purposes, focus in on the bottom left portion of the picture. Notice how there is moisture above the ground (about 1-3 miles up) over-top of very dry air (0-1 miles up).
This virga was also seen on our 13 Future Track radar as the beam was able to pick it up at this altitude! The final image is of the virga off of Meridian Road on my way to the station today
The view is looking to the west around the time of the radar image.



This post was written by Aaron Brackett on November 1, 2009


I did see quite a bit of virga today driving home from my best friends house. Although for a few seconds, I did have a few raindrops hit my windshield.
We had sprinkles fall around 415p at alpine/linden, and with those sprinkles we decided not to go for a walk cuz of fear it would rain. turns out, nope! lol