A statistical study of satellite derived channel 3 Microwave Sounding Unit (MSU) brightness-temperatures and conventionally derived fields by Parke (1994) showed that the MSU can be used to locate baroclinic waves. Most significantly, Parke found high negative average correlations between the synoptic scale MSU and midlevel height patterns in accordance with theory. However, there were instances in his six month sample where the correlations were not as expected. In this ...