Wirelessly posted (HTC Diamond: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.11) Sprint MP6950SP)
I also use gps weather radar and cool for showing the radar but it doesn't give forcasts. At least mine doesn't.
I recommend the Weatherbug app on the marketplace. I believe there is a free and a more feature packed paid edition.