Weather Prediction from Observations of Cloudlets

Article metrics

Abstract

MAY I refer to the first letter of Sir G. Archdall Reid? (NATURE, November 7, p. 676). He says: “if then the behaviour of the smallest and thinnest fragment of cloud that can be clearly isolated be watched, it is usually possible to predict very quickly and with fair confidence the state of the weather for the next few hours. If the cloudlet waxes visibly, rain is almost certain; if it wanes, fine weather is equally probable; if it neither waxes nor wanes, existing conditions are likely to continue.” It seems to me that the method of forecasting is falsified on every day on which clouds form and when rain does not follow, and there are very many such days in the year; for the cumulus of a fine day, which is common in spring, summer, and autumn, and occurs sometimes in winter, begins its life as a cloudlet, whether the ordinary man gets up early enough to see it or not. Certainly, too, cirro-cumulus often begins its life as cloudlets, but I have never seen cumuli “wane into cirro-cumuli” and rather doubt whether any one has ever observed such a phenomenon.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

Author information

Rights and permissions

Reprints and Permissions

About this article

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.