明日(あした) ashitaで de５()日(にち) 5nichi間(かん) kan雪(せつ) setsuが ga降(ふ)り()続(つづ)く() furitsuzukuことになる kotoninaru。 As of tomorrow it will have snowed for five days straight. Literal Tomorrow [with-で] 5-day snow [subject-が] continue-falling [nominalizer-こと] [dative-に] become. Without でしょう, this reads as a direct assertion rather than a projection. ~ことになる marks a future result that 'comes about' — different from ~ことになっている (already arranged) in that this emphasizes 'it will turn out that.' weathercompound verb~ことになる (it turns out that)で (boundary/reaching a point)
明日(あした) ashitaで de５()日(にち) 5nichi間(かん) kan雪(せつ) setsuが ga降(ふ)り()続(つづ)く() furitsuzukuことになる kotoninaru。 As of tomorrow it will have snowed for five days straight. Literal Tomorrow [with-で] 5-day snow [subject-が] continue-falling [nominalizer-こと] [dative-に] become. Without でしょう, this reads as a direct assertion rather than a projection. ~ことになる marks a future result that 'comes about' — different from ~ことになっている (already arranged) in that this emphasizes 'it will turn out that.' weathercompound verb~ことになる (it turns out that)で (boundary/reaching a point)