。
We couldn't arrive on time because of the storm.
Literal
Storm [because-of-に-ために] we [topic-は] on-time [at-に] arrive-could-not.
我々 (われわれ) is a markedly formal first-person plural — typical of speeches, reports, and masculine written register, carrying an authoritative, slightly old-fashioned tone compared to the neutral 私たち. 定時 ('fixed/scheduled time') and 到着できなかった (potential negative of 到着する) round out the formal report-style register.