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A capital R with a hooked tail and an arrowhead.
Also known as: Thunder symbol, Lightning plot symbol
A thunderstorm is drawn as a stylised capital R with a downward hooked tail representing lightning. Whether the R is drawn alone or with rain or hail symbols says whether the storm is in progress or has passed within the hour.
Denotes a thunderstorm, drawn as an angular capital R with a hooked descending tail standing for a lightning stroke.
Contexts: Navigation, Maps
Is combined with precipitation symbols to say whether the storm is current or was observed within the past hour but not at the time of observation.
Contexts: Navigation, Maps
An angular letter R whose descending stroke bends sharply and ends in a small arrowhead.