WP Wunderground table width issue

I’ve seen this covered before but I am unable to get the table width I want.

I am using this shortcode:
[forecast location=”04261″ caption=”” measurement=’F’ todaylabel=”Today” datelabel=”date(‘m/d/Y’)” highlow=’%%high%%°/%%low%%°’ numdays=”3″ iconset=”Helen” class=”css_table_class” cache=”true” width=”270px”]

For this sidebar on this page:
http://hostingbyhighroad.com/primetimeskiclub/?page_id=14

But the width does not change. I’ve tried % as well. Also custom css. Nothing seems to work.

http://wordpress.org/plugins/wunderground/