Predicting Tropical Cyclone Intensity Using Satellite-Measured Equivalent Blackbody Temperatures of Cloud Tops

A relationship between maximum winds and satellite-measured, equivalent blackbody temperatures near tropical cyclones was investigated with data from both the Atlantic and western North Pacific areas. This investigation revealed not only a significant correlation between satellite-derived equivalent blackbody temperatures and maximum winds but also a strong lag relationship between these temperatures and maximum winds. From this latter relationship, a regression technique was developed to forecast 24-hr changes of the maximum winds for weak (maximum winds less than or equal to 65-knots) and strong (maximum winds >65-knots) tropical cyclones by using the equivalent blackbody temperatures around the storm both alone and together with, changes in maximum winds during the preceding 24 hr and the current maximum winds. Testing these equations with independent data showed that the mean errors of forecasts made by the equations are lower than the errors in forecasts made by persistence techniques.