 However, not all of these predictions prove reliable, and many of them have since been found not to stand up to rigorous statistical testing.It was not until the invention of the electric telegraph in 1835 that the modern age of weather forecasting began.Before that, the fastest that distant weather reports could travel was around 160 kilometres per day (100 mi/d), but was more typically 60–120 kilometres per day (40–75 mi/day) (whether by land or by sea).