This research was partially funded by NASA/GAPP Grant NA16GP1605, NASA EOS-IDS Grant NAG5-3640, NASA TRMM Grant NAG5-7716, and the NSF STC Program (Agreement EAR-9876800). We would like to thank Dr. S. Shumate of the NWS/Colorado River Forecast Center for providing the surface temperature data. The first author also would like to thank Dr. Jaime E. Combariza and other staff at the Computer Center and Information Technology, The University of Arizona, for their help and support. Thanks are also extended to Ms. Corrie Thies for her careful reading and editing of the manuscript.
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