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Weather

2 stories

Reading the air above a hot road

A distant road can seem wet as light crosses the air near its surface. Thermometers, wind and viewing angle reveal different parts of that small weather system.

What a rain gauge misses on a windy day

A rain gauge counts the water that reaches its opening. Wind bends the path of drops around the instrument, so shape, height and site exposure can change the recorded total even between neighboring gauges.