Above to much above average runoff volumes were observed throughout the Great Salt Lake Basin for the April-July period. Early season forecasts issued in January mirrored the much below average snowpack conditions resulting in forecasts that were too low. As the season progressed forecasts were increased, especially in February and March, due mainly to an increasing snowpack. Forecasts changed little from April to June as the near to above average snowpack (100-120% of average in most areas) fluctuated but did not change significantly in this period. An extreme event occurred in June as it ended up being cool and one of the wettest June’s as well as one of the wettest summer months on record for many locations. The mid and upper elevation snowpack was maintained and the melt delayed. This resulted in much larger runoff volumes than expected as well as significant delays in the observed peak flows.

Observed flows were within the 10 and 90 percent exceedance values at most locations and near the most probable forecasts in many instances.