Knickerbocker Storm: Washington, D.C.'s biggest snowfall, causes a disaster when the roof of the Knickerbocker Theatre collapses, killing over 100 people.

The Knickerbocker storm was a blizzard on January 27–28, 1922 in the upper South and the middle Atlantic United States. The storm took its name from the resulting collapse of the Knickerbocker Theatre in Washington, D.C., shortly after 9 p.m. on January 28, which killed 98 people and injured 133.

The Knickerbocker Theatre was a movie theater located at 18th Street and Columbia Road in the Adams Morgan neighborhood of Washington, D.C. in the United States. The theater's roof collapsed on January 28, 1922, under the weight of snow from a two-day blizzard that was later dubbed the Knickerbocker storm. The theater was showing Get-Rich-Quick Wallingford at the time of the collapse, which killed 98 patrons and injured 133.

January 28 is the 28th day of the year in the Gregorian calendar; 337 days remain until the end of the year.