At https://www.aviationweather.gov on the Forecasts puldown, then the Aviation Forecasts selection, the chart opens and often shows what looks like a letter R with a tail in the lower right, in different colors. The legend does show the symbol. What does it indicate?
1 Answer
The Info button (top right) takes you to an explanation site, which in turn links you to
https://www.AviationWeather.gov/metar/symbol
Which explains the Symbol (under the section Fog or special weather) as Thunderstorm
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$\begingroup$ Excellent! I guess I need to poke around there more, I hadn't even tried the Info pages at all. Thanks. $\endgroup$ Jul 9, 2018 at 15:09