• Buffalo Bill Reservoir - Shoshone River April through July inflow to Buffalo Bill Reservoir is forecast at 570,000 acre-feet, which is 84 percent of the 30-year average of 679,000 acre-feet. Approximately 85,000 AF of the forecasted amount flowed into Buffalo Bill Reservoir during April, leaving 485,000 AF of inflow forecasted for May through July.
• Wind River - April through July snowmelt runoff into the Wind River above Bull Lake Creek is expected to be 290,000 acre-feet, which is 70 percent of the 30-year average of 412,000 acre-feet. Approximately 40,000 AF of the forecasted amount was received during April, leaving 250,000 AF of inflow forecasted for May through July.
• Bull Lake Reservoir - April through July snowmelt runoff into Bull Lake Reservoir from Bull Lake Creek is expected to be 100,000 acre-feet, which is 71 percent of the 30-year average of 141,000 acre-feet. Approximately 8,000 AF of the forecasted amount flowed into Bull Lake during April, leaving 92,000 AF of inflow forecasted for May through July.
• Boysen Reservoir - Wind River April through July inflow to Boysen Reservoir is forecast at 250,000 acre-feet, which is 44 percent of the 30-year average of 574,000 acre-feet. Approximately 52,000 AF of the forecasted amount flowed into Boysen Reservoir during April, leaving 198,000 AF of inflow forecasted for May through July.
• Bighorn Lake (Yellowtail Reservoir) - April through July inflow to Yellowtail Reservoir is forecast at 750,000 acre-feet, which is 66 percent of the 30-year average of 1,138,500 AF. Approximately 150,000 AF of the forecasted amount flowed into Yellowtail Reservoir during April, leaving 600,000 AF of inflow forecasted for May through July.

An acre-foot is the amount of water needed to cover 1 acre (43,560 square feet) 1 foot deep (325,851 gallons or 1,233.5 cubic meters).

For additional information on Buffalo Bill, Boysen and Bull Lake reservoirs, contact Wyoming Area Manager, Coleman W. Smith, Jr., at 307-261-5671.

For additional information on Yellowtail Reservoir, contact Montana Area Manager, Dan Jewell, at 406-247-7298.

The WYAO uses the most recent 30-year period, 1982 to 2011, to determine averages. For more information on snowmelt forecasts and real-time data, please visit the Great Plains Region's Water Operations web site at: www.usbr.gov/gp/lakes_reservoirs.