Flood Potential in the Eastern Great Basin


The following are generalized discussions of the flood potential due to snowmelt in the Eastern Great Basin drainage as of April 1, 1996. Discussions are segregated by state. It is important to understand that the potential for flooding may increase dramatically if snowmelt accelerates rapidly due to above normal temperatures or if significant rain events occur.


UTAH: At this time, the spring snowmelt flood potential varies significantly from the northern sections to southern section of the Great Basin within Utah. In the north, above average snowpack and the forecasted above average runoff volumes suggest that there will be high flows (near bankfull) along most rivers and streams, with minor local overbank flows possible. Currently, the greatest potential for snowmelt flooding is in the Six Creeks drainages along the Wasatch Front, the Weber River drainage, and sections of the upper Provo River.

In the south, below average snowpack and forecasted much below average runoff volumes indicate stream discharges due to snowmelt will be relatively low with minimum flood potential.


IDAHO: The potential for snowmelt flooding along the Great Basin rivers within Idaho is considered to be moderate at this time. Above average snowpack exists in the headwater areas and along some local drainage areas. High flows are likely along some sections of the Bear River this spring.


Snowmelt Peak Flow Forecasts - April, 1996
Colorado Basin River Forecast Center (http://www.cbrfc.gov)
Last Modified: Thursday, 11-Apr-1996 07:38:56 MDT