The dialect studied in the present paper represents Northern Russian prosodic system in which each word bears a pitch accent (word-by-word melodic contour). The analysis based on 1360 phrases show the remarkable difference of this dialect from those up-todate known typologically related dialects from Pinega region: the pitch movement in Plesetsk idiom is falling (with a preceeding rise on prestressed syllable or on a consonant in stressed syllable’s onset as opposed to a rising one on a stressed vowel in Pinega’s system. Thus, the Northern Russian dialects may vary in the direction of the pitch movement of the word-by-word accent. Meanwhile it is also was found that the meaning of incompleteness in Plesetsk dialect is marked by H + L* !Н% melodic contour (the falling pitch accent with the middle phrase or boundary tone) whereas in the statement with the finality meaning the H + L* L% contour is used (the falling pitch accent with the low boundary tone). We argue finally that the data collected may serve as a basis to distinguish three level of boundary tones in the Northern Russian dialects with word-by-word melodic contour.