The U.S.D.A. Agricultural Research Service’s (ARS) Grazinglands Research Laboratory (GRL) operates two weather station networks on two research watersheds in southwestern Oklahoma. Meteorological and hydrologic conditions in the Little Washita Experimental Watershed (LWREW) have been measured since 1961. In 1994, the ARS began monitoring the meteorological conditions in this watershed with an automated 42-station network called the ARS Micronet. This network was downgraded to 20 core stations in 2005. Also in 2005, the Ft. Cobb Reservoir (FC) Watershed was equipped with 15 weather stations like those deployed in the LWREW. This network of 15 stations will help address research objectives associated with the Conservation Effectiveness Assessment Project (CEAP). Collectively, the LWREW and FC weather station networks are referred to as the ARS Micronet. This overview provides general watershed information and description of the meteorological network.