A team of NCAR scientists has released a reanalysis that combines an ensemble of 80 different hindcasts (forecasts made for a time in the past) with real-world observations to better understand phenomena like hurricanes and improve the reliability of forecasts.
The resulting reanalysis provides snapshots of the atmosphere four times a day from 2011 through 2019, and a detailed picture of atmospheric behavior ranging from daily weather cycles to regional fronts and storms to multiyear, global patterns like El Niño. See
this CISL article for more information.