AbstractDirect field comparisons of precipitation gauges (PG) are difficult and costly. For this reason the development of correction models such as Folland's, based on wind tunnel tests, is very valuable. This note draws attention to some new wind tunnel data on the airflow over several types of gauge. the new data are in much better agreement with those of Robinson and Rodda (1969) than with those of Green and Helliwell (1972) supporting Folland's preference for the former data. In addition, the new data provide support for Folland's assumption that the airflows over the 5‐inch and Hellmann gauges are similar, though this appears to be more or less accidenta