Modern weather forecasting changes more than fleet routing

Would modern weather forecasts affect naval operations in the First World War?

They would help, though the expected direct effect is limited. Supplying modern weather satellites as well could add an intelligence advantage.

Modern forecasts would improve some First World War naval planning, although a limited effect is expected here because there is less scope for the amphibious operations that benefit most directly. If the scenario also supplies modern weather satellites, their sensors introduce a separate intelligence advantage. Infrared equipment might reveal the large heat signatures of oil-fired battleships at sea. That reconnaissance possibility depends on supplying the observation system along with the forecasts.