One reason for Hurricane Sandy's noteworthy impact was a discrepancy in its forecasting. Scientists knew of the hurricane days before it made landfall, but two different models consistently made two different predictions for its track. One week in advance of the actual landfall, the European Centre for Medium‐Range Weather Forecasts (ECMWF) predicted that the hurricane would eventually make landfall, while the Global Forecast System (GFS) forecast that the hurricane would travel toward the central north Atlantic. A sudden turn to the left—a move scientists say would only be expected every 714 years—caused Sandy to hit land.