Curitiba Heavy Rain
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Today I observed a heavy rain cloud (Cumulonimbus) forming and moving over the city of Curitiba, bringing intense and rapid rain, with a sudden drop in temperature and possible presence of descending currents (downdraft).
The cloud structure was quite defined, with a dark and low base and well-developed tops — indicating strong convection. The system advanced quickly, typical of summer cells, even outside the season.
Characteristics observed:
Heavy and persistent rain for about [insert estimated time].
Scattered and occasional thunder.
Completely dark gray sky, visibility below 1 km at times.
Cold thermal sensation after the arrival of the rain.
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