Playing for the first time since their match against Aston Villa was postponed due to a Covid-19 outbreak in their squad, Newcastle took less than a minute to grab the lead when Almiron swept his shot past West Brom keeper Sam Johnstone.
West Brom drew level five minutes into the second half at St James' Park.
Matt Phillips delivered a low cross which was met by defender Darnell Furlong, who lashed an unstoppable low shot past Karl Darlow.
Newcastle clinched the points in the 82nd minute when Dwight Gayle met a superb cross by fellow substitute Jacob Murphy to head past Johnstone.
Newcastle's second successive victory lifted the gloom from their virus issues, but struggling West Brom stay second bottom.
December 12, 2020