def fetch(dbname, dt, bbox):
    """Downloads RFE2 rainfall data from the data server."""
    url = "http://ftp.cpc.ncep.noaa.gov/fews/fewsdata/africa/rfe2/geotiff/africa_rfe.{0:04d}{1:02d}{2:02d}.tif.zip"
    return url, bbox, dt