Fig. 2. Locations of 38 rainfall stations that make up the western Sahel precipitation index, as well as the 24 Gulf of Guinea precipitation stations. August-toNovember rainfall within the Gulf of Guinea region shows a predictive signal for western Sahel rainfall and hurricane activity during the following season. June-July rainfall in the western Sahel region provides a strong predictive signal for the following Augustthrough-October hurricane activity (see Landsea 1991).