Summary
The observations of ten Aprils (1941–50) at Blue Hill have been analyzed, and it has been found that frost (night minimum temperature ≦32° F) (T) can be predicted on the basis of the 19h wet-bulb temperature (ti) by the formula:T=ti−k, in whichk is found to be 1.8 F deg. in clear weather and 2.1 F deg. in cloudy. The results of a test on an independent set of Aprils (1936–40), are satisfactory especially with clear skies at 19h.
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Karapiperis, P.P. Predicting minimum temperature (especially frost) by the evening wet-bulb at Blue Hill, Mass. in spring. Geofisica Pura e Applicata 24, 207–213 (1953). https://doi.org/10.1007/BF01996060
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DOI: https://doi.org/10.1007/BF01996060