Beginning in 1982, clear weather observations are often recorded with a missing Present Weather indicator. This practice has an adverse effect on our precipitation estimates as it introduces a wet bias. In order to circumvent this problem we have devised a method of correction which links PW with cloudiness. It is assumed that any observer making a cloud cover observation will also make a PW observation, and vice versa. Therefore, when encountering a missing observation from 1982 and later observations, cloudiness is checked. If cloudiness is missing, PW is assumed to be missing, and is not included in the precipitation calculation. If a cloudiness observation is present, however, it is assumed that there was a PW observation and that the weather was clear. The observation is used as a clear weather observation in the precipitation calculation. As a test, PW and cloudiness observations were checked prior to 1982. Cases in which a cloudiness observation was present but the PW observation was missing were very rare. We are confident, therefore, that our method of correcting PW is accurate.