Grassland Productivity Forecast

Historical Data

Great Plains

Annual Changes in Grassland Plant Water Loss Relative to Mean Values

These maps depict percent difference in April-July grassland water loss (evapotranspiration) for the year compared to the 1900-2017 mean water loss for the same months for 476 counties in the Great Plains. Red colors indicate that the county was drier than average from April-July, white indicates that the county received near normal precipitation from April-July, and blue colors indicate that the county was wetter than normal from April-July. The map titles include the sea surface temperature anomalies in two different parts of the Pacific Ocean that occurred in April of that year. PDO = Pacific Decadal Osciilation. ENSO = El Nino Southern Oscillation. A '+' sign means the the sea surface temperature was warmer than average, a '0' means the sea surface temperature was near average, nd a '-' sign means that sea surface temperature was colder than average.