Forecast of inflow of Colorado River into Lake Mead at Boulder Dam, 1939

Abstract

The May 1, 1939, forecast of inflow to Lake Mead was as follows: Accumulated precipitation during the period October 1938–April 1939, inclusive, compared with similar accumulative records for corresponding periods of the two previous seasons, indicated that the total precipitation to May 1, 1939, was 90 per cent of the average of the previous years, and that the inflow to Lake Mead would probably be 8,000,000 acre‐feet between May 1 and August 1, 1939. Based on water‐content of snow, records of this character available since 1936 indicated that the water‐content as of May 1, 1939, was 91 per cent of the previous three‐year average, or that the probable inflow would be 7,000,000 acre‐feet.