Abstract: A storm shelter structure provides enhanced protection from penetration by blown debris and from collapse. The shelter has an anchorable framework and door with vent openings having covers removable from the outside to enable emergency access to the door latches. Roof and wall panels are formed of channel members assembled in side-by-side relation. Each channel includes a web with flanges along opposite side edges, one flange including an outwardly extending lip. Channels are fastened side-by-side with a non-lipped flange adjacent a lipped flange. Engagement between the outer edge of a non-lipped flange and a lipped flange increases the stiffness of a rib formed by the joined flanges. Each wall channel flange upper end has a tab aligned with a tab on an adjacent channel for engaging an aperture in the upper frame to facilitate wall assembly and increase gripping between the wall panels and the framework.