it looks like that station uses wifi in two ways:
1) to download weather forecasts from accuweather
2) to upload your weather data to ... ?
read the docs that came with the station, and poke around in the lacrosse app - that should give you more clues
or jump right in: run a packet sniffer on your network to see if the station is uploading data, and if so, where the data are being sent. if it is sending to weather underground, then you can capture the data using the weewx-interceptor driver. if it is sending to lacrosse, and if it is not encrypted, then you might be able to extend the weewx-interceptor driver to understand whatever protocol it is using.
another approach would be to use the weewx-sdr driver. that uses rtl_433 and a usb sdr dongle to capture the radio signals directly from the sensors.
m