Valleys and basins across the western United States experience frequent episodes of radiation fog during the winter season. Freezing fog (FZFG) however is more rare. The high desert basins of northern Nevada are more likely to experience FZFG than lower elevation valleys as October–March minimum temperatures regularly fall below 0°C. During a period in mid-January 2005, northern Nevada, from Reno to Winnemucca experienced an unprecedented freezing fog episode. In Reno there were 14 daily reports of FZFG during January 2005, and nine of these days occurred consecutively from 16 through 24 January. Meteorological conditions for the nine day run of FZFG events in Reno were not extreme compared to single day episodes from 1997–2005. The height of the inversion base, inversion depth, surface temperature, wind speed, and surface pressure were found to be consistently above the mean but well below the maximum values for prior FZFG events. Regional scale surface conditions and synoptic scale upper atmospheric conditions were important factors in FZFG formation and persistence during the period 16–24 January.