Discussion
Consider the following statements about precipitation measurement.
1. Rain gauges undercatch in windy conditions.
2. Snowfall is harder to measure accurately than rain.
3. Radar measures rainfall directly and needs no calibration.
Answer: C
The first two are correct. The third is wrong, since radar measures reflected power and must be calibrated against gauges to give a rainfall figure. Wind is the main source of gauge error. Snow is harder still to catch reliably.
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