<P> On November 19, 1981, a rapid accumulation of over a foot of snow caused the roof to collapse, requiring it to be re-inflated . It deflated the following winter on December 30, 1982, again because of a tear caused by heavy snow . This was four days before the Vikings played the Dallas Cowboys in the last regular - season game of the 1982 NFL season . In the spring following that same winter, on April 14, 1983, the Metrodome roof deflated because of a tear caused by a late - season heavy snow, and the scheduled Twins' game with the California Angels was postponed . On April 26, 1986, the Metrodome roof suffered a slight tear because of high winds, causing a nine - minute delay in the bottom of the seventh inning versus the Angels; however, the roof did not deflate . </P> <P> Birdair had conducted a regular inspection of the Metrodome roof in April 2010 . Its report to the Metropolitan Sports Facilities Commission stated that "the outer membrane is in good condition and still holding up well", and rated the inner liner's condition as "fair to poor". The inspectors also noted that the inner liner of the roof was dirty (mostly due to emissions from automotive events) and had some holes in it, advising that the holes be monitored to avoid large tears from enlarging . In addition, Birdair noted some minor areas on the outer membrane that needed repairing, which were done by the time of the Commission's July regular meeting . Overall, Birdair noted the membrane was weathering as anticipated and had exceeded its service life of 20 years; it recommended planning for replacement of the roof fabric, and noted that planning and implementation would take an additional five years and cost $12--15 million . In forming their own conclusion, the Metropolitan Sports Facilities Commission staff decided that the outer membrane was in very good shape and that the roof continued to have serviceable life, and planned to schedule another testing in four years; the Commission made no recommendations . </P> <P> A severe winter storm arrived on December 10--11, 2010, with over 17 inches (43 cm) of snow accumulation, and strong winds; those winds made the roof unsafe for the snow removal crew . As the workers were pulled back, the roof was already sagging in the center . On December 12 at about 5: 00 a.m., the roof had a catastrophic collapse as three panels tore open . The night before, a Fox Sports crew setting up for an upcoming Vikings game noticed water leaking from the roof and kept their cameras on all night; those cameras captured the roof tearing and ice and snow falling into the stadium . No one was injured . Most of the roof sagged and came to rest on cable stays . The collapse caused no damage inside the stadium aside from a light fixture and some seats . The turf was not damaged; a drainage system designed for cleaning purposes allowed the field to dry out . On December 15, 2010, a fourth panel ripped open, sending more snow and ice into the dome . </P> <P> The Vikings and the New York Giants had been scheduled to play a football game on the afternoon of December 12 . The game had already been postponed to Monday night, the 13th, due to concerns of stadium officials . Because of the tears in the roof, the NFL relocated the game to Ford Field in Detroit . The league considered moving that game to the University of Minnesota's nearby TCF Bank Stadium, but it had been shut down and winterized for the season and would have needed several days to prepare for a football game . Tickets to the game were free, and the Giants ended up winning the game . Due to roof repair time estimates, the Vikings December 20 game against the Chicago Bears was moved to TCF Bank Stadium . The final two games for the 2010 Minnesota Vikings season already were scheduled as road games, and the team had already been eliminated from the playoffs . </P>

When did the roof collapse at the metrodome
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