Extended Streamflow Guidance
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1
060
FGUS65 KSTR 041920
ESGAZ

NATIONAL WEATHER SERVICE
COLORADO BASIN RIVER FORECAST CENTER
SALT LAKE CITY, UTAH

JANUARY 4, 2018

                        FLOOD POTENTIAL OUTLOOK
                                ARIZONA

The flood potential for Arizona Rivers and streams is not high at
this time.

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 0 percent of average in
the Salt-Verde River Basin, 10 percent of average for the Gila Basin and
0 percent for the Little Colorado Basin. December precipitation was
5 percent of average in the Salt-Verde River Basin, 15 percent in the
Gila River Basin, and 0 percent of average in the Little Colorado Basin.

January 1st snowpack conditions was 5 percent of average in the
Salt-Verde River Basin, 10 percent of average in the upper Gila,
and 0 percent of average in the Little Colorado River Basin.

Modeled soil moisture states were much below average at the
beginning of the water year. January through May runoff volumes
are primarily influenced by the frequency and magnitude of winter
rain events.

Due to the below average soil moisture conditions, below average
snow water equivalents and the presence of a La Nina year, the
flood potential for Arizona is not high at this time.


CBRFC

NNNN

$$




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.