Boston to lift snow emergency Wednesday . Boston mobilizes Hundreds National Guardsmen amid blizzard conditions . Hundreds of flights are canceled at Massachusetts 's LaGuardia Airport Thomas Bosco . More than 15,000 households are without power in Massachusetts .
Boston to lift snow emergency Thursday . Massachusetts mobilizes 250 National Guardsmen amid blizzard conditions . Hundreds of flights are canceled at Boston 's Logan International Airport . More than 15,000 households are without power in Massachusetts .