It's really simple . Go to https://www.wunderground.com/ and on the side next to the search feature this a link for JOIN . You will start there and full out a user name ( email address ) and make your password . After filling all your info you will get a station ID and you go into your My Acurite and under setting hit share weather and put your WU info there and hit save . It will take awhile for it to all take effect .
I already have a Wunderground account and am sharing my data. The problem is that when I go to view the WunderMap, my station is not on the map. That's what I'm wondering is how to get my station to show up on the map?