RadarScope’s dual pane feature is especially useful in identifying these areas in that it allows you to assess the couplet, as well as the storm structure, in the same view. When examining these couplets, knowledge of the storm’s structure can help assess the tornado potential. Velocity couplets can provide clues to areas that may need further investigation. As such, a radar indicated Tornado Warning was issued with this storm. This suggests that there is the potential for a tornado. In the image above, the velocity couplet is very well defined and it lines up with the location of the notch in the reflectivity data. By WeatherOps powered by DTN based in Minneapolis, MINNESOTA (USA). Dual pane (example on the left) capability lets you compare two radar products side-by-side to obtain a complete understanding of the weather shown on. Comparing the reflectivity in the top image to the velocity image on the bottom, the couplet does not line up very well with the notch (the couplet is south of the notch in the reflectivity) and therefore, a tornado warning is not warranted.Ībout an hour and a half later, a velocity couplet was indicated just north of Lake Crystal, MN. RadarScope - Version Pro Tier 1 - Ultimate Weather Radar App for Work and Play Dual Pane Capability. The notch indicates inflow into the storm and is one area where tornadoes could develop. Looking at the top image in the graphic, you see a notch to the northeast of New Ulm. The reason being that the velocity couplet does not line up with any reflectivity structures where a potential tornado would be located. In the case of this particular storm, there was not a tornado warning at the time of this image. Below is an example of a velocity couplet from a storm near Minneapolis Sunday evening. This signature can clue meteorologists in to areas that may need further investigation. Green pixels show wind moving towards the radar while red pixels show wind moving away from the radar. It is simply a signature in which winds blowing away from the radar are next to winds blowing toward the radar. To start off, let’s explain what a velocity couplet is. While some cases clearly show the tornado potential, other cases may not be as clear cut. A velocity couplet seen on a RadarScope weather radar image may indicate the potential for a tornado, leading to tornado warnings being issued.
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