The missile--a McDonald's bag containing an ice-cold drink--was launched into the car of another motorist in stalled traffic on Interstate 95 on July 2.
Hall, who was traveling north with her three young children and her pregnant sister, got into an altercation with another motorist involving gestures and abrupt lane switches.
The stories vary on exactly what happened, but everyone agrees that it ended with Hall throwing the bag, spilling drink all over the passenger in the other car.
The case has been dubbed the "McMissile" case and has attracted regional and national attention.
Court sources said CNN and several Washington television stations had requested cameras in the courtroom for the sentencing. No decision has been made on that request.
At Hall's trial, the jury had the option of convicting Hall of "unlawfully" throwing a missile, which would have given them the option of giving Hall no jail time.
But the jury was not aware of the two-year minimum before agreeing on the more serious charge.
Jim Ilijevich, a local defense attorney, said the missile statute is one of several that need some fine-tuning.
He said Hall was properly charged as the statute reads, but, "That statute is ridiculous. It doesn't really distinguish between a cup of ice and a bullet, and I can't believe this is what the legislature had in mind."
Ilijevich said he finds it "unfortunate" that Hall, who had no prior criminal record, is now a convicted felon.
