The National Oceanic and Atmospheric Administration (NOAA) cannot reveal weather forecasts from a particularly accurate hurricane prediction model to the public that pays for the American government agency – because of a deal with a private insurance risk firm.

The model at issue is called the Hurricane Forecast Improvement Program (HFIP) Corrected Consensus Approach (HCCA). In 2023, it was deemed in a National Hurricane Center (NHC) report [PDF] to be one of the two “best performers,” the other being a model called IVCN (Intensity Variable Consensus).

2020 contract between NOAA and RenaissanceRe Risk Sciences, disclosed in response to a Freedom of Information Act request by The Washington Post, requires NOAA to keep HCCA forecasts – which incorporate a proprietary technique from RenaissanceRe – secret for five years.