On this day in Lewis & Clark history...
While at their winter quarters across from St. Louis (Camp River Dubois), the temperature dropped well below freezing accompanied with strong winds.
From the journals...
Tuesday Jany 3rd 1804
a Verry Cold blustering day in Doneyan Co: Thermometer one oClock in the open air the mercuria fell to 21 D. below the freezing point [11° F]
all the after part of the Day the wind so high that the View up the Missouris appeared Dredfull, as the wind blew off the Sand with fury as to Almost darken that part of the atmespear this added to agutation of the water apd. truly gloomy
Photo taken with permission at Fort Mandan.