Tag Archives: Radar Anomalies

Tale Of Two Downbursts

Lake Michigan sailors have had a challenging summer. In mid-July, competitors in the Chicago-Mac were treated to a rare type of downburst known as heat burst (or dry downburst) near Milwaukee late on Saturday night (click here for the summary). Three weeks later, sailors at the T-10 North American Championship near Chicago had an encounter with a different kind of downburst, one that blasted the fleet with hurricane-force winds. These downbursts, while similar in some ways, are very different in others. The downburst at the T-10 Nationals offers an opportunity to introduce a pair of relatively unknown Doppler weather radar products – storm heights (echo tops) and vertically integrated liquid (VIL) – that can help shed light on the evolution of an approaching thunderstorm.

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Doppler Radar: When Is A Storm Not A Storm

Doppler Weather Radar

Doppler weather radar has a lot to offer a weather-savvy boater. Before leaving the security of your dock, a quick look at the wide array of radar products offered by the National Weather Service (NWS) can help you determine if thunderstorms are occurring nearby. With a little knowledge and practice, you can use radar to identify where the strongest storms are located, the speed and the direction in which they are moving, and if they possess rotation which raises the possibility of a tornado or waterspout. But a quick look doesn’t always tell the full story.
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