1. CDM Smith, Cambridge, MA 02139.
2. Univ. of New Hampshire, Durham, NH 03824 (corresponding author).
3. Dept. of Civil and Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931.
4. Dept. of Anthropology, Emory Univ., Atlanta, GA 30322.
5. Institut de L’Environnement et des Recherches Agricoles (INERA), Burkina Faso, West Africa.
6. Direction de la Météorologie (DM), Burkina Faso, West Africa.
7. La Direction Générale des Ressources en Eau (DGRE), Burkina Faso, West Africa.
8. AgWeatherNet, Washington State Univ., Prosser, WA 99350.