It hasn't been the greatest year for meteor showers. Most have been average, and many have had to contend with bright moonlight on the night of the shower's peak. That could change the night of November 21 if a prediction by two meteor scientists comes to fruition.
The Earth is passing by a stream of debris left by an unknown comet. On rare occasions, this pass creates an outburst of the alpha Monocerotid meteors (AMO). If the outburst occurs, you could see as many as 400 meteors per hour. Though, a more tempered prediction from Bill Cooke of NASA's Meteoroid Environment Office projects that 100 is a more reasonable ceiling. Additionally, that "if" is important. There's a chance it doesn't occur at all, in which case you'd see something more like three meteors per hour.
Nonetheless, if the shower -- with the potential to be labeled a "meteor storm" -- does arrive, it will be the first time since 1995, when the AMOs produced more than 400 meteors per hour. For the mathematically lazy, that's multiple meteors shooting across the sky every minute. (Other outbursts occurred in 1985, 1935, and 1925.)
As Cooke notes, some projections are even higher because we may pass closer to the center of the comet's debris stream than we did in 1995.