  Temporal photometric variations at near infrared to submillimeter wavelengths
have been found in low-mass young stellar objects. These phenomena are
generally interpreted as accretion events of star-disk systems with varying
accretion rates. There is growing evidence suggesting that similar luminosity
flaring also occurs in high-mass star/cluster-forming regions. We report in
this Letter the rise and fall of the 900 ${\mu}$m continuum emission and the
newly found 349.1 GHz methanol maser emission in the massive star forming
region S255IR~SMA1 observed with the Submillimeter Array and the Atacama Large
Millimeter/submillimeter Array. The level of flux variation at a factor of
$\sim$ 2 at the submillimeter band and the relatively short 2-year duration of
this burst suggest that the event is probably similar to those milder and more
frequent minor bursts seen in 3D numerical simulations.
