I have the MKII with a serial connection to WV32. Never used the usb, although I probably will at the next upgrade. As far as WV32 pushing out the data you need, you may want to contact Dave Heider at WV32.
Here's his contact info:
Dave Heider
15651 SE Woodland Heights Rd.
Amity, OR
(503) 864-3217
Fax (503) 864-4381
email: wxview@weatherview32.com