Several studies have examined the West African Monsoon (WAM), but analyses of the relationship between MCSs (Mesoscale Convective Systems) and the Saharan Air Layer (SAL) remain scarce. During the 2006 NASA-African Monsoon Multidisciplinary Analyses (NAMMA) project, a number of measurements were utilized in an effort to study and quantify the SAL during the West African Monsoon. Satellite imagery from MODIS and the GOES SAL-split window platform indicated high atmospheric dust loading over Senegal and the eastern Atlantic Ocean during a SAL outbreak on 10-11 September 2006. A strong squall line event also occurred on 11 September; this squall line was part of the vortex that later became TD 8 (and eventually Hurricane Helene). In-situ (radiosonde) and ground-based (radar, aerosol optical depth) measurements will be used to characterize the SAL at locations over the continent and ocean. Investigation and comparison of these measurements, with an emphasis on probing the characteristics of this SAL outbreak, may lead to a better understanding of the squall line/SAL interaction. Preliminary analysis and results will be presented at the meeting.