December 2022 Streamflow Tile Map

A tile map of the US showing streamgages by flow levels through the month of December 2022. For each state, an area chart shows the proportion of streamgages in wet, normal, or dry conditions. Streamflow conditions are quantified using percentiles comparing the past month’s flow levels to the historic record for each streamgage. During the month of December, storm events brought wetter than normal conditions for much of the Eastern U.S., while a tropical storm brought flooding conditions to the Pacific Coast. At the national scale, many sites experienced wetter than normal conditions as a polar vortex and atmospheric river conditions persisted across the Eastern U.S. and Pacific Coast, respectively.