SLCESPAZ NATIONAL WEATHER SERVICE COLORADO BASIN RIVER FORECAST CENTER SALT LAKE CITY, UTAH June 1, 2021 The following are updated forecasts for the Lake Mead Local (or Intervening Flow). Forecasts include monthly values for June - August. ------------------------------------------------------------------- May 1-31 OBSERVED (EST.) CBRFC LML INFLOW: - values in KAF - (Mead Release 1085.7 + Mead Evap 46.0 + Mead Storage Change -473.4 + SNWP Use 28.0 - Lagged Powell Release 639.4) ~ 46.9 ------------------------------------------------------------------- FORECASTS: * All Forecasts are the 50% exceedance probability value * Lake Mead Intervening Flow: June 47 KAF ( 81% of average) July 73 KAF (100% of average) August 85 KAF (100% of average) Lake Mead Adjusted Intervening Flow: June 22.7 KAF July 68.0 KAF August 89.1 KAF Equation Used for Adjusted Flow: Inflow(BOR) = Inflow(NWS) + Evap(BOR) - Evap(NWS) + BankStorageChange(BOR) ------------------------------------------------------------------- Tributaries: Virgin River nr Littlefield Jun 6.3 KAF ( 62% of average) Jul 7.1 KAF (100% of average) Aug 9.1 KAF (100% of average) Little Colorado nr Cameron Jun 0.5 KAF (110% of average) Jul 6.3 KAF (100% of average) Aug 19.3 KAF (100% of average) Paria Creek nr Lees Ferry Jun 0.1 KAF ( 23% of average) Jul 1.0 KAF (101% of average) Aug 2.4 KAF (100% of average) * All Forecasts are the 50% exceedance probability value * $$ Finch/CBRFC