1. Climate Prediction Center, National Centers for Environmental Prediction, National Oceanic and Atmospheric Administration, College Park, Maryland;
2. Climate Prediction Center, National Centers for Environmental Prediction, National Oceanic and Atmospheric Administration, College Park, Maryland, and University Corporation for Atmospheric Research, Boulder, Colorado;
3. Agence Nationale de l’Aviation Civile et de la Météorologie, Dakar, Senegal;
4. Direction Générale de la Santé Publique, Dakar, Senegal