Extended Streamflow Guidance
Issued by NWS
FGUS65 KSTR 072022
NATIONAL WEATHER SERVICE
COLORADO BASIN RIVER FORECAST CENTER
SALT LAKE CITY, UTAH
JANUARY 7, 2015
FLOOD POTENTIAL OUTLOOK
The flood potential for Arizona Rivers and streams is not high at this
Because the nature of flooding in Arizona is associated with rainfall
events versus snow melt it`s difficult to determine with much certainty
the flood threat over a season. Existing streamflow, soil, and snowpack
conditions are analyzed for their potential contribution to streamflow
levels during future rainfall events.
Seasonal October-December precipitation was 80 percent of average in
the Salt-Verde River Basin, 75 percent of average for the Gila Basin and
85 percent for the Little Colorado Basin. December precipitation was
140 percent of average in the Salt-Verde River Basin, 85 percent in the
Gila River Basin, and 160 percent of average in the Little Colorado Basin.
January 1st snow water equivalent was near 60 percent of average in the
Salt-Verde River Basin, 35 percent of average in the upper Gila,
and 50 percent of average in the Little Colorado River Basin.
Modeled soil moisture states vary with most areas below average at this
time. However, the January through May runoff volumes are primarily
influenced by the frequency and magnitude of winter rain events.
Given the presence of weak ENSO El Nino climate conditions, there is a
chance for above average rainfall over the next few months. The latest
CPC climate forecasts suggest wetter than average precipitation